Mercurial > hg > octave-jordi
annotate src/lex.l @ 8535:75e6ab186761
lexer debugging functions
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 19 Jan 2009 16:53:30 -0500 |
| parents | 0e0bd07e6ae2 |
| children | de1b944d5306 |
| rev | line source |
|---|---|
| 1994 | 1 /* |
| 1 | 2 |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 4753 | 24 %option prefix = "octave_" |
| 25 | |
| 4208 | 26 %s COMMAND_START |
| 27 %s MATRIX_START | |
| 4240 | 28 |
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29 %x SCRIPT_FILE_BEGIN |
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30 |
| 4240 | 31 %x NESTED_FUNCTION_END |
| 32 %x NESTED_FUNCTION_BEGIN | |
| 1 | 33 |
| 34 %{ | |
| 240 | 35 #ifdef HAVE_CONFIG_H |
| 1220 | 36 #include <config.h> |
| 240 | 37 #endif |
| 38 | |
| 1341 | 39 #include <cctype> |
| 40 #include <cstring> | |
| 41 | |
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42 #include <set> |
| 5765 | 43 #include <sstream> |
| 1823 | 44 #include <string> |
| 4214 | 45 #include <stack> |
| 1823 | 46 |
| 4093 | 47 #ifdef HAVE_UNISTD_H |
| 48 #ifdef HAVE_SYS_TYPES_H | |
| 49 #include <sys/types.h> | |
| 50 #endif | |
| 51 #include <unistd.h> | |
| 52 #endif | |
| 53 | |
| 2926 | 54 #include "cmd-edit.h" |
| 4153 | 55 #include "quit.h" |
| 4910 | 56 #include "lo-mappers.h" |
| 2926 | 57 |
| 1497 | 58 // These would be alphabetical, but y.tab.h must be included before |
| 59 // oct-gperf.h and y.tab.h must be included after token.h and the tree | |
| 60 // class declarations. We can't include y.tab.h in oct-gperf.h | |
| 61 // because it may not be protected to allow it to be included multiple | |
| 62 // times. | |
| 63 | |
| 4264 | 64 #include "Cell.h" |
| 3665 | 65 #include "comment-list.h" |
| 2181 | 66 #include "defun.h" |
| 1355 | 67 #include "error.h" |
| 4910 | 68 #include "gripes.h" |
| 1351 | 69 #include "input.h" |
| 1355 | 70 #include "lex.h" |
| 2891 | 71 #include "ov.h" |
| 1355 | 72 #include "parse.h" |
| 2987 | 73 #include "pt-all.h" |
| 2891 | 74 #include "symtab.h" |
| 75 #include "token.h" | |
| 76 #include "toplev.h" | |
| 1355 | 77 #include "utils.h" |
| 78 #include "variables.h" | |
| 2492 | 79 #include <y.tab.h> |
| 80 #include <oct-gperf.h> | |
| 1 | 81 |
| 2716 | 82 #if ! (defined (FLEX_SCANNER) \ |
| 83 && defined (YY_FLEX_MAJOR_VERSION) && YY_FLEX_MAJOR_VERSION >= 2 \ | |
| 84 && defined (YY_FLEX_MINOR_VERSION) && YY_FLEX_MINOR_VERSION >= 5) | |
| 85 #error lex.l requires flex version 2.5.4 or later | |
| 86 #endif | |
| 87 | |
| 4753 | 88 #define yylval octave_lval |
| 89 | |
| 90 // Arrange to get input via readline. | |
| 91 | |
| 92 #ifdef YY_INPUT | |
| 93 #undef YY_INPUT | |
| 94 #endif | |
| 95 #define YY_INPUT(buf, result, max_size) \ | |
| 96 if ((result = octave_read (buf, max_size)) < 0) \ | |
| 97 YY_FATAL_ERROR ("octave_read () in flex scanner failed"); | |
| 98 | |
| 99 // Try to avoid crashing out completely on fatal scanner errors. | |
| 100 // The call to yy_fatal_error should never happen, but it avoids a | |
| 101 // `static function defined but not used' warning from gcc. | |
| 102 | |
| 103 #ifdef YY_FATAL_ERROR | |
| 104 #undef YY_FATAL_ERROR | |
| 105 #endif | |
| 106 #define YY_FATAL_ERROR(msg) \ | |
| 107 do \ | |
| 108 { \ | |
| 109 error (msg); \ | |
| 110 OCTAVE_QUIT; \ | |
| 111 yy_fatal_error (msg); \ | |
| 112 } \ | |
| 113 while (0) | |
| 114 | |
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115 #define DISPLAY_TOK_AND_RETURN(tok) \ |
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116 do \ |
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117 { \ |
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118 int tok_val = tok; \ |
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119 if (Vdisplay_tokens) \ |
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120 display_token (tok_val); \ |
| 8535 | 121 if (lexer_debug_flag) \ |
| 122 { \ | |
| 123 std::cerr << "R: "; \ | |
| 124 display_token (tok_val); \ | |
| 125 std::cerr << std::endl; \ | |
| 126 } \ | |
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127 return tok_val; \ |
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128 } \ |
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129 while (0) |
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130 |
| 4910 | 131 #define COUNT_TOK_AND_RETURN(tok) \ |
| 132 do \ | |
| 133 { \ | |
| 134 Vtoken_count++; \ | |
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135 DISPLAY_TOK_AND_RETURN (tok); \ |
| 4910 | 136 } \ |
| 137 while (0) | |
| 138 | |
| 4753 | 139 #define TOK_RETURN(tok) \ |
| 140 do \ | |
| 141 { \ | |
| 142 current_input_column += yyleng; \ | |
| 143 lexer_flags.quote_is_transpose = false; \ | |
| 144 lexer_flags.convert_spaces_to_comma = true; \ | |
| 4910 | 145 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 146 } \ |
| 147 while (0) | |
| 148 | |
| 149 #define TOK_PUSH_AND_RETURN(name, tok) \ | |
| 150 do \ | |
| 151 { \ | |
| 152 yylval.tok_val = new token (name, input_line_number, \ | |
| 153 current_input_column); \ | |
| 154 token_stack.push (yylval.tok_val); \ | |
| 155 TOK_RETURN (tok); \ | |
| 156 } \ | |
| 157 while (0) | |
| 158 | |
| 159 #define BIN_OP_RETURN(tok, convert) \ | |
| 160 do \ | |
| 161 { \ | |
| 162 yylval.tok_val = new token (input_line_number, current_input_column); \ | |
| 163 token_stack.push (yylval.tok_val); \ | |
| 164 current_input_column += yyleng; \ | |
| 165 lexer_flags.quote_is_transpose = false; \ | |
| 166 lexer_flags.convert_spaces_to_comma = convert; \ | |
| 4910 | 167 COUNT_TOK_AND_RETURN (tok); \ |
| 4753 | 168 } \ |
| 169 while (0) | |
| 170 | |
| 171 #define XBIN_OP_RETURN(tok, convert) \ | |
| 172 do \ | |
| 173 { \ | |
| 174 gripe_matlab_incompatible_operator (yytext); \ | |
| 175 BIN_OP_RETURN (tok, convert); \ | |
| 176 } \ | |
| 177 while (0) | |
| 178 | |
| 8535 | 179 #define LEXER_DEBUG(pattern) \ |
| 180 do \ | |
| 181 { \ | |
| 182 if (lexer_debug_flag) \ | |
| 183 lexer_debug (pattern, yytext); \ | |
| 184 } \ | |
| 185 while (0) | |
| 186 | |
| 3883 | 187 // TRUE means that we have encountered EOF on the input stream. |
| 188 bool parser_end_of_input = false; | |
| 189 | |
| 1826 | 190 // Flags that need to be shared between the lexer and parser. |
| 191 lexical_feedback lexer_flags; | |
| 192 | |
| 1351 | 193 // Stack to hold tokens so that we can delete them when the parser is |
| 194 // reset and avoid growing forever just because we are stashing some | |
| 195 // information. This has to appear before lex.h is included, because | |
| 196 // one of the macros defined there uses token_stack. | |
| 2614 | 197 // |
| 5775 | 198 // FIXME -- this should really be static, but that causes |
| 2614 | 199 // problems on some systems. |
| 4214 | 200 std::stack <token*> token_stack; |
| 1351 | 201 |
| 1826 | 202 // Did eat_whitespace() eat a space or tab, or a newline, or both? |
| 1 | 203 |
| 1826 | 204 typedef int yum_yum; |
| 1 | 205 |
| 1826 | 206 const yum_yum ATE_NOTHING = 0; |
| 207 const yum_yum ATE_SPACE_OR_TAB = 1; | |
| 208 const yum_yum ATE_NEWLINE = 2; | |
| 1088 | 209 |
| 3351 | 210 // Is the closest nesting level a square bracket, squiggly brace or a paren? |
| 1826 | 211 |
| 4214 | 212 class bracket_brace_paren_nesting_level |
| 1826 | 213 { |
| 214 public: | |
| 215 | |
| 4214 | 216 bracket_brace_paren_nesting_level (void) : context () { } |
| 1826 | 217 |
| 3351 | 218 ~bracket_brace_paren_nesting_level (void) { } |
| 219 | |
| 4214 | 220 void bracket (void) { context.push (BRACKET); } |
| 221 bool is_bracket (void) | |
| 222 { return ! context.empty () && context.top () == BRACKET; } | |
| 223 | |
| 224 void brace (void) { context.push (BRACE); } | |
| 225 bool is_brace (void) | |
| 226 { return ! context.empty () && context.top () == BRACE; } | |
| 227 | |
| 228 void paren (void) { context.push (PAREN); } | |
| 229 bool is_paren (void) | |
| 230 { return ! context.empty () && context.top () == PAREN; } | |
| 231 | |
| 4608 | 232 bool is_bracket_or_brace (void) |
| 233 { return (! context.empty () | |
| 234 && (context.top () == BRACKET || context.top () == BRACE)); } | |
| 235 | |
| 4214 | 236 bool none (void) { return context.empty (); } |
| 237 | |
| 238 void remove (void) { if (! context.empty ()) context.pop (); } | |
| 239 | |
| 240 void clear (void) { while (! context.empty ()) context.pop (); } | |
| 1826 | 241 |
| 242 private: | |
| 243 | |
| 4214 | 244 std::stack<int> context; |
| 245 | |
| 5225 | 246 static const int BRACKET; |
| 247 static const int BRACE; | |
| 248 static const int PAREN; | |
| 1826 | 249 |
| 3351 | 250 bracket_brace_paren_nesting_level (const bracket_brace_paren_nesting_level&); |
| 1826 | 251 |
| 3351 | 252 bracket_brace_paren_nesting_level& |
| 253 operator = (const bracket_brace_paren_nesting_level&); | |
| 1826 | 254 }; |
| 255 | |
| 5225 | 256 const int bracket_brace_paren_nesting_level::BRACKET = 1; |
| 257 const int bracket_brace_paren_nesting_level::BRACE = 2; | |
| 258 const int bracket_brace_paren_nesting_level::PAREN = 3; | |
| 259 | |
| 3351 | 260 static bracket_brace_paren_nesting_level nesting_level; |
| 1 | 261 |
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262 static bool Vdisplay_tokens = false; |
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263 |
| 4910 | 264 static unsigned int Vtoken_count = 0; |
| 265 | |
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266 // The start state that was in effect when the beginning of a block |
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267 // comment was noticed. |
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268 static int block_comment_nesting_level = 0; |
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269 |
| 8535 | 270 // Internal variable for lexer debugging state. |
| 271 static bool lexer_debug_flag = false; | |
| 272 | |
| 146 | 273 // Forward declarations for functions defined at the bottom of this |
| 274 // file. | |
| 275 | |
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276 static int text_yyinput (void); |
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277 static void xunput (char c, char *buf); |
| 1 | 278 static void fixup_column_count (char *s); |
| 146 | 279 static void do_comma_insert_check (void); |
| 4867 | 280 static int is_keyword_token (const std::string& s); |
| 4238 | 281 static void prep_for_function (void); |
| 282 static void prep_for_nested_function (void); | |
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283 static int process_comment (bool start_in_block, bool& eof); |
| 2857 | 284 static bool match_any (char c, const char *s); |
| 3263 | 285 static bool next_token_is_sep_op (void); |
| 3246 | 286 static bool next_token_is_bin_op (bool spc_prev); |
| 287 static bool next_token_is_postfix_unary_op (bool spc_prev); | |
| 3523 | 288 static std::string strip_trailing_whitespace (char *s); |
| 3246 | 289 static void handle_number (void); |
| 975 | 290 static int handle_string (char delim, int text_style = 0); |
| 4612 | 291 static int handle_close_bracket (bool spc_gobbled, int bracket_type); |
| 3974 | 292 static int handle_identifier (void); |
| 3096 | 293 static bool have_continuation (bool trailing_comments_ok = true); |
| 294 static bool have_ellipsis_continuation (bool trailing_comments_ok = true); | |
| 3665 | 295 static void scan_for_comments (const char *); |
| 1826 | 296 static yum_yum eat_whitespace (void); |
| 297 static yum_yum eat_continuation (void); | |
| 3388 | 298 static void maybe_warn_separator_insert (char sep); |
| 3400 | 299 static void gripe_single_quote_string (void); |
| 4037 | 300 static void gripe_matlab_incompatible (const std::string& msg); |
| 301 static void maybe_gripe_matlab_incompatible_comment (char c); | |
| 302 static void gripe_matlab_incompatible_continuation (void); | |
| 303 static void gripe_matlab_incompatible_operator (const std::string& op); | |
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304 static void display_token (int tok); |
| 8535 | 305 static void lexer_debug (const char *pattern, const char *text); |
| 1 | 306 |
| 307 %} | |
| 308 | |
| 309 D [0-9] | |
| 310 S [ \t] | |
| 5570 | 311 NL ((\n)|(\r)|(\r\n)) |
| 2042 | 312 SNL ({S}|{NL}) |
| 1 | 313 EL (\.\.\.) |
| 967 | 314 BS (\\) |
| 315 CONT ({EL}|{BS}) | |
| 1 | 316 Im [iIjJ] |
| 967 | 317 CCHAR [#%] |
| 318 COMMENT ({CCHAR}.*{NL}) | |
| 319 SNLCMT ({SNL}|{COMMENT}) | |
| 320 NOT ((\~)|(\!)) | |
| 4037 | 321 POW ((\*\*)|(\^)) |
| 322 EPOW (\.{POW}) | |
| 5290 | 323 IDENT ([_$a-zA-Z][_$a-zA-Z0-9]*) |
| 1 | 324 EXPON ([DdEe][+-]?{D}+) |
| 3220 | 325 NUMBER (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)|(0[xX][0-9a-fA-F]+)) |
| 1 | 326 %% |
| 327 | |
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328 <SCRIPT_FILE_BEGIN>. { |
| 8535 | 329 LEXER_DEBUG ("<SCRIPT_FILE_BEGIN>."); |
| 330 | |
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331 BEGIN (INITIAL); |
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332 xunput (yytext[0], yytext); |
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333 COUNT_TOK_AND_RETURN (SCRIPT); |
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334 } |
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335 |
| 4240 | 336 <NESTED_FUNCTION_END>. { |
| 8535 | 337 LEXER_DEBUG ("<NESTED_FUNCTION_END>."); |
| 338 | |
| 4323 | 339 BEGIN (NESTED_FUNCTION_BEGIN); |
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340 xunput (yytext[0], yytext); |
| 4910 | 341 COUNT_TOK_AND_RETURN (';'); |
| 4240 | 342 } |
| 343 | |
| 344 <NESTED_FUNCTION_BEGIN>. { | |
| 8535 | 345 LEXER_DEBUG ("<NESTED_FUNCTION_BEGIN>."); |
| 346 | |
| 4323 | 347 BEGIN (INITIAL); |
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348 xunput (yytext[0], yytext); |
| 4238 | 349 prep_for_nested_function (); |
| 4910 | 350 COUNT_TOK_AND_RETURN (FCN); |
| 4238 | 351 } |
| 352 | |
| 968 | 353 %{ |
| 4208 | 354 // Help and other command-style functions are a pain in the ass. This |
| 968 | 355 // stuff needs to be simplified. May require some changes in the |
| 356 // parser too. | |
| 357 %} | |
| 358 | |
| 4208 | 359 <COMMAND_START>{NL} { |
| 8535 | 360 LEXER_DEBUG ("<COMMAND_START>{NL}"); |
| 361 | |
| 4323 | 362 BEGIN (INITIAL); |
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363 input_line_number++; |
| 967 | 364 current_input_column = 1; |
| 2857 | 365 lexer_flags.quote_is_transpose = false; |
| 366 lexer_flags.convert_spaces_to_comma = true; | |
| 5212 | 367 lexer_flags.doing_rawcommand = false; |
| 4910 | 368 COUNT_TOK_AND_RETURN ('\n'); |
| 967 | 369 } |
| 1 | 370 |
| 4208 | 371 <COMMAND_START>[\;\,] { |
| 8535 | 372 LEXER_DEBUG ("<COMMAND_START>[\\;\\,]"); |
| 373 | |
| 5102 | 374 if (lexer_flags.doing_rawcommand) |
| 5279 | 375 TOK_PUSH_AND_RETURN (yytext, SQ_STRING); |
| 5102 | 376 |
| 377 BEGIN (INITIAL); | |
| 378 | |
| 379 if (strcmp (yytext, ",") == 0) | |
| 380 TOK_RETURN (','); | |
| 967 | 381 else |
| 5102 | 382 TOK_RETURN (';'); |
| 967 | 383 } |
| 1 | 384 |
| 4208 | 385 <COMMAND_START>[\"\'] { |
| 8535 | 386 LEXER_DEBUG ("<COMMAND_START>[\\\"\\']"); |
| 387 | |
| 975 | 388 current_input_column++; |
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389 int tok = handle_string (yytext[0], true); |
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390 COUNT_TOK_AND_RETURN (tok); |
| 975 | 391 } |
| 392 | |
| 4923 | 393 <COMMAND_START>[^#% \t\r\n\;\,\"\'][^ \t\r\n\;\,]*{S}* { |
| 8535 | 394 LEXER_DEBUG ("<COMMAND_START>[^#% \\t\\r\\n\\;\\,\\\"\\'][^ \\t\\r\\n\\;\\,]*{S}*"); |
| 395 | |
| 3523 | 396 std::string tok = strip_trailing_whitespace (yytext); |
| 5279 | 397 TOK_PUSH_AND_RETURN (tok, SQ_STRING); |
| 967 | 398 } |
| 1 | 399 |
| 968 | 400 %{ |
| 1 | 401 // For this and the next two rules, we're looking at ']', and we |
| 971 | 402 // need to know if the next token is `=' or `=='. |
| 1 | 403 // |
| 404 // It would have been so much easier if the delimiters were simply | |
| 405 // different for the expression on the left hand side of the equals | |
| 406 // operator. | |
| 971 | 407 // |
| 408 // It's also a pain in the ass to decide whether to insert a comma | |
| 409 // after seeing a ']' character... | |
|
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410 |
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411 // FIXME -- we need to handle block comments here. |
| 968 | 412 %} |
| 413 | |
| 4208 | 414 <MATRIX_START>{SNLCMT}*\]{S}* { |
| 8535 | 415 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*\\]{S}*"); |
| 416 | |
| 3665 | 417 scan_for_comments (yytext); |
| 1001 | 418 fixup_column_count (yytext); |
| 419 int c = yytext[yyleng-1]; | |
| 420 int cont_is_spc = eat_continuation (); | |
| 4608 | 421 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); |
| 5345 | 422 int tok_to_return = handle_close_bracket (spc_gobbled, ']'); |
| 423 if (spc_gobbled) | |
| 424 yyunput (' ', yytext); | |
| 425 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 4608 | 426 } |
| 427 | |
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428 %{ |
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429 // FIXME -- we need to handle block comments here. |
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430 %} |
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431 |
| 4608 | 432 <MATRIX_START>{SNLCMT}*\}{S}* { |
| 8535 | 433 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*\\}{S}*"); |
| 434 | |
| 4608 | 435 scan_for_comments (yytext); |
| 436 fixup_column_count (yytext); | |
| 437 int c = yytext[yyleng-1]; | |
| 438 int cont_is_spc = eat_continuation (); | |
| 439 bool spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 5345 | 440 int tok_to_return = handle_close_bracket (spc_gobbled, '}'); |
| 441 if (spc_gobbled) | |
| 442 yyunput (' ', yytext); | |
| 443 COUNT_TOK_AND_RETURN (tok_to_return); | |
| 967 | 444 } |
| 1 | 445 |
| 968 | 446 %{ |
| 1088 | 447 // Commas are element separators in matrix constants. If we don't |
| 448 // check for continuations here we can end up inserting too many | |
| 449 // commas. | |
| 968 | 450 %} |
| 451 | |
| 4208 | 452 <MATRIX_START>{S}*\,{S}* { |
| 8535 | 453 LEXER_DEBUG ("<MATRIX_START>{S}*\\,{S}*"); |
| 454 | |
| 1088 | 455 current_input_column += yyleng; |
| 3388 | 456 |
| 1088 | 457 int tmp = eat_continuation (); |
| 3388 | 458 |
| 2857 | 459 lexer_flags.quote_is_transpose = false; |
| 460 lexer_flags.convert_spaces_to_comma = true; | |
| 3388 | 461 |
| 462 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) | |
| 463 { | |
| 464 maybe_warn_separator_insert (';'); | |
| 465 | |
| 4476 | 466 yyunput (';', yytext); |
| 3388 | 467 } |
| 468 | |
| 4910 | 469 COUNT_TOK_AND_RETURN (','); |
| 967 | 470 } |
| 1 | 471 |
| 968 | 472 %{ |
| 473 // In some cases, spaces in matrix constants can turn into commas. | |
| 474 // If commas are required, spaces are not important in matrix | |
| 1088 | 475 // constants so we just eat them. If we don't check for continuations |
| 476 // here we can end up inserting too many commas. | |
| 968 | 477 %} |
| 430 | 478 |
| 4208 | 479 <MATRIX_START>{S}+ { |
| 8535 | 480 LEXER_DEBUG ("<MATRIX_START>{S}+"); |
| 481 | |
| 1088 | 482 current_input_column += yyleng; |
| 3388 | 483 |
| 484 int tmp = eat_continuation (); | |
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485 bool bin_op = next_token_is_bin_op (true); |
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486 bool postfix_un_op = next_token_is_postfix_unary_op (true); |
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487 bool sep_op = next_token_is_sep_op (); |
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488 |
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489 if (! (postfix_un_op || bin_op || sep_op) |
| 4608 | 490 && nesting_level.is_bracket_or_brace () |
| 3388 | 491 && lexer_flags.convert_spaces_to_comma) |
| 967 | 492 { |
| 3388 | 493 if ((tmp & ATE_NEWLINE) == ATE_NEWLINE) |
| 494 { | |
| 495 maybe_warn_separator_insert (';'); | |
| 967 | 496 |
| 4476 | 497 yyunput (';', yytext); |
| 3388 | 498 } |
| 499 | |
| 4476 | 500 lexer_flags.quote_is_transpose = false; |
| 501 lexer_flags.convert_spaces_to_comma = true; | |
| 502 | |
| 503 maybe_warn_separator_insert (','); | |
| 504 | |
| 4910 | 505 COUNT_TOK_AND_RETURN (','); |
| 967 | 506 } |
| 507 } | |
| 430 | 508 |
| 968 | 509 %{ |
| 1088 | 510 // Semicolons are handled as row seprators in matrix constants. If we |
| 511 // don't eat whitespace here we can end up inserting too many | |
| 512 // semicolons. | |
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513 |
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514 // FIXME -- we need to handle block comments here. |
| 968 | 515 %} |
| 516 | |
| 4208 | 517 <MATRIX_START>{SNLCMT}*;{SNLCMT}* { |
| 8535 | 518 LEXER_DEBUG ("<MATRIX_START>{SNLCMT}*;{SNLCMT}*"); |
| 519 | |
| 3665 | 520 scan_for_comments (yytext); |
| 967 | 521 fixup_column_count (yytext); |
| 1001 | 522 eat_whitespace (); |
| 2857 | 523 lexer_flags.quote_is_transpose = false; |
| 524 lexer_flags.convert_spaces_to_comma = true; | |
| 4910 | 525 COUNT_TOK_AND_RETURN (';'); |
| 967 | 526 } |
| 527 | |
| 968 | 528 %{ |
| 1088 | 529 // In some cases, new lines can also become row separators. If we |
| 530 // don't eat whitespace here we can end up inserting too many | |
| 531 // semicolons. | |
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532 |
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533 // FIXME -- we need to handle block comments here. |
| 985 | 534 %} |
| 535 | |
| 4208 | 536 <MATRIX_START>{S}*{COMMENT}{SNLCMT}* | |
| 537 <MATRIX_START>{S}*{NL}{SNLCMT}* { | |
| 8535 | 538 LEXER_DEBUG ("<MATRIX_START>{S}*{COMMENT}{SNLCMT}*|<MATRIX_START>{S}*{NL}{SNLCMT}*"); |
| 539 | |
| 3665 | 540 scan_for_comments (yytext); |
| 1082 | 541 fixup_column_count (yytext); |
| 1088 | 542 eat_whitespace (); |
| 3388 | 543 |
| 4476 | 544 lexer_flags.quote_is_transpose = false; |
| 545 lexer_flags.convert_spaces_to_comma = true; | |
| 546 | |
| 547 if (nesting_level.none ()) | |
| 548 return LEXICAL_ERROR; | |
| 985 | 549 |
| 4608 | 550 if (nesting_level.is_bracket_or_brace ()) |
| 3388 | 551 { |
| 552 maybe_warn_separator_insert (';'); | |
| 553 | |
| 4910 | 554 COUNT_TOK_AND_RETURN (';'); |
| 985 | 555 } |
| 556 } | |
| 557 | |
| 967 | 558 \[{S}* { |
| 8535 | 559 LEXER_DEBUG ("\\[{S}*"); |
| 560 | |
| 3351 | 561 nesting_level.bracket (); |
| 975 | 562 |
| 1082 | 563 current_input_column += yyleng; |
| 2857 | 564 lexer_flags.quote_is_transpose = false; |
| 565 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 566 |
| 5615 | 567 if (lexer_flags.defining_func && ! lexer_flags.parsed_function_name) |
| 568 lexer_flags.looking_at_return_list = true; | |
| 569 else | |
| 570 lexer_flags.looking_at_matrix_or_assign_lhs = true; | |
| 571 | |
| 975 | 572 promptflag--; |
| 573 eat_whitespace (); | |
| 574 | |
| 5102 | 575 lexer_flags.bracketflag++; |
| 576 BEGIN (MATRIX_START); | |
| 577 COUNT_TOK_AND_RETURN ('['); | |
| 967 | 578 } |
| 1 | 579 |
| 968 | 580 \] { |
| 8535 | 581 LEXER_DEBUG ("\\]"); |
| 582 | |
| 1826 | 583 nesting_level.remove (); |
| 968 | 584 |
| 5102 | 585 TOK_RETURN (']'); |
| 968 | 586 } |
| 587 | |
| 588 %{ | |
| 589 // Imaginary numbers. | |
| 590 %} | |
| 591 | |
| 592 {NUMBER}{Im} { | |
| 8535 | 593 LEXER_DEBUG ("{NUMBER}{Im}"); |
| 594 | |
| 3246 | 595 handle_number (); |
| 4910 | 596 COUNT_TOK_AND_RETURN (IMAG_NUM); |
| 968 | 597 } |
| 598 | |
| 599 %{ | |
| 600 // Real numbers. Don't grab the `.' part of a dot operator as part of | |
| 601 // the constant. | |
| 602 %} | |
| 603 | |
| 8535 | 604 {D}+/\.[\*/\\^\'] | |
| 968 | 605 {NUMBER} { |
| 8535 | 606 LEXER_DEBUG ("{D}+/\\.[\\*/\\^\\']|{NUMBER}"); |
| 3246 | 607 handle_number (); |
| 4910 | 608 COUNT_TOK_AND_RETURN (NUM); |
| 968 | 609 } |
| 610 | |
| 611 %{ | |
| 612 // Eat whitespace. Whitespace inside matrix constants is handled by | |
| 4208 | 613 // the <MATRIX_START> start state code above. |
| 968 | 614 %} |
| 615 | |
| 967 | 616 {S}* { |
| 617 current_input_column += yyleng; | |
| 618 } | |
| 619 | |
| 968 | 620 %{ |
| 621 // Continuation lines. Allow comments after continuations. | |
| 622 %} | |
| 623 | |
| 967 | 624 {CONT}{S}*{NL} | |
| 625 {CONT}{S}*{COMMENT} { | |
| 8535 | 626 LEXER_DEBUG ("{CONT}{S}*{NL}|{CONT}{S}*{COMMENT}"); |
| 627 | |
| 4037 | 628 if (yytext[0] == '\\') |
| 629 gripe_matlab_incompatible_continuation (); | |
| 3665 | 630 scan_for_comments (yytext); |
| 967 | 631 promptflag--; |
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632 input_line_number++; |
| 967 | 633 current_input_column = 1; |
| 634 } | |
| 1 | 635 |
| 968 | 636 %{ |
| 637 // End of file. | |
| 638 %} | |
| 639 | |
| 967 | 640 <<EOF>> { |
| 8535 | 641 LEXER_DEBUG ("<<EOF>>"); |
| 642 | |
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643 if (block_comment_nesting_level != 0) |
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644 { |
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645 warning ("block comment open at end of input"); |
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646 |
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647 if ((reading_fcn_file || reading_script_file) |
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648 && ! curr_fcn_file_name.empty ()) |
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649 warning ("near line %d of file `%s.m'", |
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650 input_line_number, curr_fcn_file_name.c_str ()); |
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651 } |
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652 |
| 967 | 653 TOK_RETURN (END_OF_INPUT); |
| 654 } | |
| 1 | 655 |
| 968 | 656 %{ |
| 970 | 657 // Identifiers. Truncate the token at the first space or tab but |
| 658 // don't write directly on yytext. | |
| 968 | 659 %} |
| 660 | |
| 967 | 661 {IDENT}{S}* { |
| 8535 | 662 LEXER_DEBUG ("{IDENT}{S}*"); |
| 663 | |
| 4238 | 664 int id_tok = handle_identifier (); |
| 665 | |
| 666 if (id_tok >= 0) | |
| 4910 | 667 COUNT_TOK_AND_RETURN (id_tok); |
| 967 | 668 } |
| 1 | 669 |
| 968 | 670 %{ |
| 4342 | 671 // Function handles. |
| 672 %} | |
| 673 | |
| 4930 | 674 "@" { |
| 8535 | 675 LEXER_DEBUG ("@"); |
| 676 | |
| 4930 | 677 current_input_column++; |
| 678 lexer_flags.quote_is_transpose = false; | |
| 679 lexer_flags.convert_spaces_to_comma = false; | |
| 680 lexer_flags.looking_at_function_handle++; | |
| 681 COUNT_TOK_AND_RETURN ('@'); | |
| 4342 | 682 } |
| 683 | |
| 684 %{ | |
| 968 | 685 // A new line character. New line characters inside matrix constants |
| 4208 | 686 // are handled by the <MATRIX_START> start state code above. If closest |
| 985 | 687 // nesting is inside parentheses, don't return a row separator. |
| 968 | 688 %} |
| 689 | |
| 967 | 690 {NL} { |
| 8535 | 691 LEXER_DEBUG ("{NL}"); |
| 692 | |
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693 input_line_number++; |
| 967 | 694 current_input_column = 1; |
| 2857 | 695 lexer_flags.quote_is_transpose = false; |
| 696 lexer_flags.convert_spaces_to_comma = true; | |
| 1826 | 697 if (nesting_level.none ()) |
| 4910 | 698 COUNT_TOK_AND_RETURN ('\n'); |
| 4037 | 699 else if (nesting_level.is_paren ()) |
| 700 gripe_matlab_incompatible ("bare newline inside parentheses"); | |
| 4608 | 701 else if (nesting_level.is_bracket_or_brace ()) |
| 985 | 702 return LEXICAL_ERROR; |
| 967 | 703 } |
| 1 | 704 |
| 968 | 705 %{ |
| 706 // Single quote can either be the beginning of a string or a transpose | |
| 707 // operator. | |
| 708 %} | |
| 709 | |
| 967 | 710 "'" { |
| 8535 | 711 LEXER_DEBUG ("'"); |
| 712 | |
| 967 | 713 current_input_column++; |
| 2857 | 714 lexer_flags.convert_spaces_to_comma = true; |
| 1 | 715 |
| 1826 | 716 if (lexer_flags.quote_is_transpose) |
| 967 | 717 { |
| 718 do_comma_insert_check (); | |
| 4910 | 719 COUNT_TOK_AND_RETURN (QUOTE); |
| 967 | 720 } |
| 721 else | |
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722 { |
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723 int tok = handle_string ('\''); |
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724 COUNT_TOK_AND_RETURN (tok); |
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725 } |
| 967 | 726 } |
| 1 | 727 |
| 968 | 728 %{ |
| 971 | 729 // Double quotes always begin strings. |
| 730 %} | |
| 731 | |
| 973 | 732 \" { |
| 8535 | 733 LEXER_DEBUG ("\""); |
| 734 | |
| 973 | 735 current_input_column++; |
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736 int tok = handle_string ('"'); |
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737 COUNT_TOK_AND_RETURN (tok); |
| 973 | 738 } |
| 971 | 739 |
| 740 %{ | |
| 985 | 741 // Gobble comments. If closest nesting is inside parentheses, don't |
| 742 // return a new line. | |
| 743 %} | |
| 968 | 744 |
| 967 | 745 {CCHAR} { |
| 8535 | 746 LEXER_DEBUG ("{CCHAR}"); |
| 747 | |
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748 xunput (yytext[0], yytext); |
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749 |
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750 bool eof = false; |
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751 int tok = process_comment (false, eof); |
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752 |
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753 if (eof) |
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754 TOK_RETURN (END_OF_INPUT); |
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755 else if (tok > 0) |
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756 COUNT_TOK_AND_RETURN (tok); |
| 967 | 757 } |
| 440 | 758 |
| 968 | 759 %{ |
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760 // Block comments. |
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761 %} |
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762 |
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763 ^{S}*{CCHAR}\{{S}*{NL} { |
| 8535 | 764 LEXER_DEBUG ("^{S}*{CCHAR}\\{{S}*{NL}"); |
| 765 | |
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766 input_line_number++; |
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767 current_input_column = 1; |
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768 block_comment_nesting_level++; |
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769 promptflag--; |
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770 bool eof = false; |
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771 process_comment (true, eof); |
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772 } |
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773 |
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774 %{ |
| 968 | 775 // Other operators. |
| 776 %} | |
| 777 | |
| 8535 | 778 ":" { LEXER_DEBUG (":"); BIN_OP_RETURN (':', false); } |
| 779 | |
| 780 ".+" { LEXER_DEBUG (".+"); XBIN_OP_RETURN (EPLUS, false); } | |
| 781 ".-" { LEXER_DEBUG (".-"); XBIN_OP_RETURN (EMINUS, false); } | |
| 782 ".*" { LEXER_DEBUG (".*"); BIN_OP_RETURN (EMUL, false); } | |
| 783 "./" { LEXER_DEBUG ("./"); BIN_OP_RETURN (EDIV, false); } | |
| 784 ".\\" { LEXER_DEBUG (".\\"); BIN_OP_RETURN (ELEFTDIV, false); } | |
| 785 ".^" { LEXER_DEBUG (".^"); BIN_OP_RETURN (EPOW, false); } | |
| 786 ".**" { LEXER_DEBUG (".**"); XBIN_OP_RETURN (EPOW, false); } | |
| 787 ".'" { LEXER_DEBUG (".'"); do_comma_insert_check (); BIN_OP_RETURN (TRANSPOSE, true); } | |
| 788 "++" { LEXER_DEBUG ("++"); do_comma_insert_check (); XBIN_OP_RETURN (PLUS_PLUS, true); } | |
| 789 "--" { LEXER_DEBUG ("--"); do_comma_insert_check (); XBIN_OP_RETURN (MINUS_MINUS, true); } | |
| 790 "<=" { LEXER_DEBUG ("<="); BIN_OP_RETURN (EXPR_LE, false); } | |
| 791 "==" { LEXER_DEBUG ("=="); BIN_OP_RETURN (EXPR_EQ, false); } | |
| 792 "~=" { LEXER_DEBUG ("~="); BIN_OP_RETURN (EXPR_NE, false); } | |
| 793 "!=" { LEXER_DEBUG ("!="); XBIN_OP_RETURN (EXPR_NE, false); } | |
| 794 ">=" { LEXER_DEBUG (">="); BIN_OP_RETURN (EXPR_GE, false); } | |
| 795 "&" { LEXER_DEBUG ("&"); BIN_OP_RETURN (EXPR_AND, false); } | |
| 796 "|" { LEXER_DEBUG ("|"); BIN_OP_RETURN (EXPR_OR, false); } | |
| 797 "<" { LEXER_DEBUG ("<"); BIN_OP_RETURN (EXPR_LT, false); } | |
| 798 ">" { LEXER_DEBUG (">"); BIN_OP_RETURN (EXPR_GT, false); } | |
| 799 "+" { LEXER_DEBUG ("+"); BIN_OP_RETURN ('+', false); } | |
| 800 "-" { LEXER_DEBUG ("-"); BIN_OP_RETURN ('-', false); } | |
| 801 "*" { LEXER_DEBUG ("*"); BIN_OP_RETURN ('*', false); } | |
| 802 "/" { LEXER_DEBUG ("/"); BIN_OP_RETURN ('/', false); } | |
| 803 "\\" { LEXER_DEBUG ("\\"); BIN_OP_RETURN (LEFTDIV, false); } | |
| 804 ";" { LEXER_DEBUG (";"); BIN_OP_RETURN (';', true); } | |
| 805 "," { LEXER_DEBUG (","); BIN_OP_RETURN (',', true); } | |
| 806 "^" { LEXER_DEBUG ("^"); BIN_OP_RETURN (POW, false); } | |
| 807 "**" { LEXER_DEBUG ("**"); XBIN_OP_RETURN (POW, false); } | |
| 808 "=" { LEXER_DEBUG ("="); BIN_OP_RETURN ('=', true); } | |
| 809 "&&" { LEXER_DEBUG ("&&"); BIN_OP_RETURN (EXPR_AND_AND, false); } | |
| 810 "||" { LEXER_DEBUG ("||"); BIN_OP_RETURN (EXPR_OR_OR, false); } | |
| 811 "<<" { LEXER_DEBUG ("<<"); XBIN_OP_RETURN (LSHIFT, false); } | |
| 812 ">>" { LEXER_DEBUG (">>"); XBIN_OP_RETURN (RSHIFT, false); } | |
| 967 | 813 |
| 814 {NOT} { | |
| 8535 | 815 LEXER_DEBUG ("{NOT}"); |
| 816 | |
| 4037 | 817 if (yytext[0] == '~') |
| 818 BIN_OP_RETURN (EXPR_NOT, false); | |
| 819 else | |
| 820 XBIN_OP_RETURN (EXPR_NOT, false); | |
| 967 | 821 } |
| 1 | 822 |
| 967 | 823 "(" { |
| 8535 | 824 LEXER_DEBUG ("("); |
| 825 | |
| 4131 | 826 lexer_flags.looking_at_indirect_ref = false; |
| 1826 | 827 nesting_level.paren (); |
| 985 | 828 promptflag--; |
| 967 | 829 TOK_RETURN ('('); |
| 830 } | |
| 831 | |
| 832 ")" { | |
| 8535 | 833 LEXER_DEBUG (")"); |
| 834 | |
| 1826 | 835 nesting_level.remove (); |
| 967 | 836 current_input_column++; |
| 2857 | 837 lexer_flags.quote_is_transpose = true; |
| 4608 | 838 lexer_flags.convert_spaces_to_comma = nesting_level.is_bracket_or_brace (); |
| 1001 | 839 do_comma_insert_check (); |
| 4910 | 840 COUNT_TOK_AND_RETURN (')'); |
| 967 | 841 } |
| 842 | |
| 8535 | 843 "." { LEXER_DEBUG ("."); TOK_RETURN ('.'); } |
| 844 | |
| 845 "+=" { LEXER_DEBUG ("+="); XBIN_OP_RETURN (ADD_EQ, false); } | |
| 846 "-=" { LEXER_DEBUG ("-="); XBIN_OP_RETURN (SUB_EQ, false); } | |
| 847 "*=" { LEXER_DEBUG ("*="); XBIN_OP_RETURN (MUL_EQ, false); } | |
| 848 "/=" { LEXER_DEBUG ("/="); XBIN_OP_RETURN (DIV_EQ, false); } | |
| 849 "\\=" { LEXER_DEBUG ("\\="); XBIN_OP_RETURN (LEFTDIV_EQ, false); } | |
| 850 ".+=" { LEXER_DEBUG (".+="); XBIN_OP_RETURN (ADD_EQ, false); } | |
| 851 ".-=" { LEXER_DEBUG (".-="); XBIN_OP_RETURN (SUB_EQ, false); } | |
| 852 ".*=" { LEXER_DEBUG (".*="); XBIN_OP_RETURN (EMUL_EQ, false); } | |
| 853 "./=" { LEXER_DEBUG ("./="); XBIN_OP_RETURN (EDIV_EQ, false); } | |
| 854 ".\\=" { LEXER_DEBUG (".\\="); XBIN_OP_RETURN (ELEFTDIV_EQ, false); } | |
| 855 {POW}= { LEXER_DEBUG ("{POW}="); XBIN_OP_RETURN (POW_EQ, false); } | |
| 856 {EPOW}= { LEXER_DEBUG ("{EPOW}="); XBIN_OP_RETURN (EPOW_EQ, false); } | |
| 857 "&=" { LEXER_DEBUG ("&="); XBIN_OP_RETURN (AND_EQ, false); } | |
| 858 "|=" { LEXER_DEBUG ("|="); XBIN_OP_RETURN (OR_EQ, false); } | |
| 859 "<<=" { LEXER_DEBUG ("<<="); XBIN_OP_RETURN (LSHIFT_EQ, false); } | |
| 860 ">>=" { LEXER_DEBUG (">>="); XBIN_OP_RETURN (RSHIFT_EQ, false); } | |
| 2877 | 861 |
| 4608 | 862 \{{S}* { |
| 8535 | 863 LEXER_DEBUG ("\\{{S}*"); |
| 864 | |
| 3351 | 865 nesting_level.brace (); |
| 4608 | 866 |
| 867 current_input_column += yyleng; | |
| 868 lexer_flags.quote_is_transpose = false; | |
| 869 lexer_flags.convert_spaces_to_comma = true; | |
| 870 | |
| 3351 | 871 promptflag--; |
| 4608 | 872 eat_whitespace (); |
| 873 | |
| 4613 | 874 lexer_flags.braceflag++; |
| 4608 | 875 BEGIN (MATRIX_START); |
| 4910 | 876 COUNT_TOK_AND_RETURN ('{'); |
| 3351 | 877 } |
| 878 | |
| 879 "}" { | |
| 8535 | 880 LEXER_DEBUG ("}"); |
| 881 | |
| 3351 | 882 nesting_level.remove (); |
| 883 | |
| 4608 | 884 TOK_RETURN ('}'); |
| 3351 | 885 } |
| 886 | |
| 968 | 887 %{ |
| 2066 | 888 // Unrecognized input is a lexical error. |
| 968 | 889 %} |
| 1 | 890 |
| 2042 | 891 . { |
| 8535 | 892 LEXER_DEBUG ("."); |
| 893 | |
| 4240 | 894 // EOF happens here if we are parsing nested functions. |
| 895 | |
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896 xunput (yytext[0], yytext); |
| 4248 | 897 |
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898 int c = text_yyinput (); |
| 4248 | 899 |
| 900 if (c != EOF) | |
| 4240 | 901 { |
| 902 current_input_column++; | |
| 903 | |
| 904 error ("invalid character `%s' (ASCII %d) near line %d, column %d", | |
| 4248 | 905 undo_string_escape (static_cast<char> (c)), c, |
| 4240 | 906 input_line_number, current_input_column); |
| 907 | |
| 908 return LEXICAL_ERROR; | |
| 909 } | |
| 910 else | |
| 911 TOK_RETURN (END_OF_INPUT); | |
| 2066 | 912 } |
| 1 | 913 |
| 914 %% | |
| 915 | |
| 767 | 916 // GAG. |
| 917 // | |
| 918 // If we're reading a matrix and the next character is '[', make sure | |
| 919 // that we insert a comma ahead of it. | |
| 920 | |
| 146 | 921 void |
| 1 | 922 do_comma_insert_check (void) |
| 923 { | |
| 1001 | 924 int spc_gobbled = eat_continuation (); |
| 2970 | 925 |
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926 int c = text_yyinput (); |
| 2970 | 927 |
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928 xunput (c, yytext); |
| 2970 | 929 |
| 1001 | 930 if (spc_gobbled) |
| 4410 | 931 yyunput (' ', yytext); |
| 2970 | 932 |
| 3351 | 933 lexer_flags.do_comma_insert = (lexer_flags.bracketflag && c == '['); |
| 1 | 934 } |
| 935 | |
| 767 | 936 // Fix things up for errors or interrupts. The parser is never called |
| 937 // recursively, so it is always safe to reinitialize its state before | |
| 938 // doing any parsing. | |
| 939 | |
| 1 | 940 void |
| 941 reset_parser (void) | |
| 942 { | |
| 1826 | 943 // Start off on the right foot. |
| 4323 | 944 BEGIN (INITIAL); |
| 4318 | 945 |
| 3883 | 946 parser_end_of_input = false; |
| 4238 | 947 end_tokens_expected = 0; |
| 948 | |
| 949 while (! symtab_context.empty ()) | |
| 950 symtab_context.pop (); | |
| 287 | 951 |
| 7336 | 952 symbol_table::reset_parent_scope (); |
| 953 | |
| 1826 | 954 // We do want a prompt by default. |
| 1 | 955 promptflag = 1; |
| 287 | 956 |
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957 // We are not in a block comment. |
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958 block_comment_nesting_level = 0; |
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959 |
| 3351 | 960 // Error may have occurred inside some brackets, braces, or parentheses. |
| 985 | 961 nesting_level.clear (); |
| 287 | 962 |
| 1826 | 963 // Clear out the stack of token info used to track line and column |
| 964 // numbers. | |
| 143 | 965 while (! token_stack.empty ()) |
| 4214 | 966 { |
| 967 delete token_stack.top (); | |
| 968 token_stack.pop (); | |
| 969 } | |
| 287 | 970 |
| 1826 | 971 // Can be reset by defining a function. |
| 985 | 972 if (! (reading_script_file || reading_fcn_file)) |
| 973 { | |
| 974 current_input_column = 1; | |
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975 input_line_number = command_editor::current_command_number (); |
| 985 | 976 } |
| 287 | 977 |
| 1826 | 978 // Only ask for input from stdin if we are expecting interactive |
| 979 // input. | |
| 3174 | 980 if ((interactive || forced_interactive) |
| 3880 | 981 && ! (reading_fcn_file |
| 982 || reading_script_file | |
| 983 || get_input_from_eval_string | |
| 3174 | 984 || input_from_startup_file)) |
| 287 | 985 yyrestart (stdin); |
| 991 | 986 |
| 1826 | 987 // Clear the buffer for help text. |
| 4426 | 988 while (! help_buf.empty ()) |
| 989 help_buf.pop (); | |
| 1755 | 990 |
| 1826 | 991 // Reset other flags. |
| 992 lexer_flags.init (); | |
| 1 | 993 } |
| 994 | |
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995 static int |
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996 text_yyinput (void) |
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997 { |
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998 int c = yyinput (); |
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999 |
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1000 // Convert CRLF into just LF and single CR into LF. |
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1001 |
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1002 if (c == '\r') |
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1003 { |
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1004 c = yyinput (); |
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1005 |
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1006 if (c != '\n') |
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1007 { |
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1008 yyunput (c, yytext); |
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1009 c = '\n'; |
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1010 } |
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1011 } |
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1012 |
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1013 if (c == '\n') |
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1014 input_line_number++; |
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1015 |
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1016 return c; |
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1017 } |
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1018 |
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1019 static void |
| 8535 | 1020 display_character (char c) |
| 1021 { | |
| 1022 if (isgraph (c)) | |
| 1023 std::cerr << c; | |
| 1024 else | |
| 1025 switch (c) | |
| 1026 { | |
| 1027 case 0: | |
| 1028 std::cerr << "NUL"; | |
| 1029 break; | |
| 1030 | |
| 1031 case 1: | |
| 1032 std::cerr << "SOH"; | |
| 1033 break; | |
| 1034 | |
| 1035 case 2: | |
| 1036 std::cerr << "STX"; | |
| 1037 break; | |
| 1038 | |
| 1039 case 3: | |
| 1040 std::cerr << "ETX"; | |
| 1041 break; | |
| 1042 | |
| 1043 case 4: | |
| 1044 std::cerr << "EOT"; | |
| 1045 break; | |
| 1046 | |
| 1047 case 5: | |
| 1048 std::cerr << "ENQ"; | |
| 1049 break; | |
| 1050 | |
| 1051 case 6: | |
| 1052 std::cerr << "ACK"; | |
| 1053 break; | |
| 1054 | |
| 1055 case 7: | |
| 1056 std::cerr << "\\a"; | |
| 1057 break; | |
| 1058 | |
| 1059 case 8: | |
| 1060 std::cerr << "\\b"; | |
| 1061 break; | |
| 1062 | |
| 1063 case 9: | |
| 1064 std::cerr << "\\t"; | |
| 1065 break; | |
| 1066 | |
| 1067 case 10: | |
| 1068 std::cerr << "\\n"; | |
| 1069 break; | |
| 1070 | |
| 1071 case 11: | |
| 1072 std::cerr << "\\v"; | |
| 1073 break; | |
| 1074 | |
| 1075 case 12: | |
| 1076 std::cerr << "\\f"; | |
| 1077 break; | |
| 1078 | |
| 1079 case 13: | |
| 1080 std::cerr << "\\r"; | |
| 1081 break; | |
| 1082 | |
| 1083 case 14: | |
| 1084 std::cerr << "SO"; | |
| 1085 break; | |
| 1086 | |
| 1087 case 15: | |
| 1088 std::cerr << "SI"; | |
| 1089 break; | |
| 1090 | |
| 1091 case 16: | |
| 1092 std::cerr << "DLE"; | |
| 1093 break; | |
| 1094 | |
| 1095 case 17: | |
| 1096 std::cerr << "DC1"; | |
| 1097 break; | |
| 1098 | |
| 1099 case 18: | |
| 1100 std::cerr << "DC2"; | |
| 1101 break; | |
| 1102 | |
| 1103 case 19: | |
| 1104 std::cerr << "DC3"; | |
| 1105 break; | |
| 1106 | |
| 1107 case 20: | |
| 1108 std::cerr << "DC4"; | |
| 1109 break; | |
| 1110 | |
| 1111 case 21: | |
| 1112 std::cerr << "NAK"; | |
| 1113 break; | |
| 1114 | |
| 1115 case 22: | |
| 1116 std::cerr << "SYN"; | |
| 1117 break; | |
| 1118 | |
| 1119 case 23: | |
| 1120 std::cerr << "ETB"; | |
| 1121 break; | |
| 1122 | |
| 1123 case 24: | |
| 1124 std::cerr << "CAN"; | |
| 1125 break; | |
| 1126 | |
| 1127 case 25: | |
| 1128 std::cerr << "EM"; | |
| 1129 break; | |
| 1130 | |
| 1131 case 26: | |
| 1132 std::cerr << "SUB"; | |
| 1133 break; | |
| 1134 | |
| 1135 case 27: | |
| 1136 std::cerr << "ESC"; | |
| 1137 break; | |
| 1138 | |
| 1139 case 28: | |
| 1140 std::cerr << "FS"; | |
| 1141 break; | |
| 1142 | |
| 1143 case 29: | |
| 1144 std::cerr << "GS"; | |
| 1145 break; | |
| 1146 | |
| 1147 case 30: | |
| 1148 std::cerr << "RS"; | |
| 1149 break; | |
| 1150 | |
| 1151 case 31: | |
| 1152 std::cerr << "US"; | |
| 1153 break; | |
| 1154 | |
| 1155 case 32: | |
| 1156 std::cerr << "SPACE"; | |
| 1157 break; | |
| 1158 | |
| 1159 case 127: | |
| 1160 std::cerr << "DEL"; | |
| 1161 break; | |
| 1162 } | |
| 1163 } | |
| 1164 static void | |
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1165 xunput (char c, char *buf) |
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1166 { |
| 8535 | 1167 if (lexer_debug_flag) |
| 1168 { | |
| 1169 std::cerr << "U: "; | |
| 1170 display_character (c); | |
| 1171 std::cerr << std::endl; | |
| 1172 } | |
| 1173 | |
|
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1174 if (c == '\n') |
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1175 input_line_number--; |
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1176 |
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1177 yyunput (c, buf); |
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1178 } |
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1179 |
| 767 | 1180 // If we read some newlines, we need figure out what column we're |
| 1181 // really looking at. | |
| 1182 | |
| 1 | 1183 static void |
| 1184 fixup_column_count (char *s) | |
| 1185 { | |
| 1186 char c; | |
| 1187 while ((c = *s++) != '\0') | |
| 1188 { | |
| 1189 if (c == '\n') | |
|
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1190 { |
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1191 input_line_number++; |
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1192 current_input_column = 1; |
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1193 } |
| 1 | 1194 else |
| 1195 current_input_column++; | |
| 1196 } | |
| 1197 } | |
| 1198 | |
| 767 | 1199 // Include these so that we don't have to link to libfl.a. |
| 246 | 1200 |
| 3332 | 1201 int |
| 1 | 1202 yywrap (void) |
| 1203 { | |
| 287 | 1204 return 1; |
| 1 | 1205 } |
| 1206 | |
| 767 | 1207 // Tell us all what the current buffer is. |
| 1208 | |
| 1 | 1209 YY_BUFFER_STATE |
| 1210 current_buffer (void) | |
| 1211 { | |
| 1212 return YY_CURRENT_BUFFER; | |
| 1213 } | |
| 1214 | |
| 767 | 1215 // Create a new buffer. |
| 1216 | |
| 1 | 1217 YY_BUFFER_STATE |
| 1218 create_buffer (FILE *f) | |
| 1219 { | |
| 1220 return yy_create_buffer (f, YY_BUF_SIZE); | |
| 1221 } | |
| 1222 | |
| 767 | 1223 // Start reading a new buffer. |
| 1224 | |
| 1 | 1225 void |
| 1226 switch_to_buffer (YY_BUFFER_STATE buf) | |
| 1227 { | |
| 1228 yy_switch_to_buffer (buf); | |
| 1229 } | |
| 1230 | |
| 767 | 1231 // Delete a buffer. |
| 1232 | |
| 1 | 1233 void |
| 1234 delete_buffer (YY_BUFFER_STATE buf) | |
| 1235 { | |
| 1236 yy_delete_buffer (buf); | |
| 1237 } | |
| 1238 | |
| 767 | 1239 // Restore a buffer (for unwind-prot). |
| 1240 | |
| 1 | 1241 void |
| 1242 restore_input_buffer (void *buf) | |
| 1243 { | |
| 2861 | 1244 switch_to_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 1245 } |
| 1246 | |
| 767 | 1247 // Delete a buffer (for unwind-prot). |
| 1248 | |
| 1 | 1249 void |
| 1250 delete_input_buffer (void *buf) | |
| 1251 { | |
| 2861 | 1252 delete_buffer (static_cast<YY_BUFFER_STATE> (buf)); |
| 1 | 1253 } |
| 1254 | |
| 4238 | 1255 static void |
| 1256 prep_for_function (void) | |
| 1257 { | |
| 1258 end_tokens_expected++; | |
| 1259 | |
| 1260 promptflag--; | |
| 1261 | |
| 1262 lexer_flags.defining_func = true; | |
| 1263 lexer_flags.parsed_function_name = false; | |
| 1264 | |
| 1265 if (! (reading_fcn_file || reading_script_file)) | |
| 1266 input_line_number = 1; | |
| 1267 } | |
| 1268 | |
| 1269 static void | |
| 1270 prep_for_nested_function (void) | |
| 1271 { | |
| 4240 | 1272 lexer_flags.parsing_nested_function = 1; |
| 4426 | 1273 help_buf.push (std::string ()); |
| 4238 | 1274 prep_for_function (); |
| 4240 | 1275 // We're still only expecting one end token for this set of functions. |
| 1276 end_tokens_expected--; | |
| 4238 | 1277 yylval.tok_val = new token (input_line_number, current_input_column); |
| 1278 token_stack.push (yylval.tok_val); | |
| 1279 } | |
| 1280 | |
| 1281 // Handle keywords. Return -1 if the keyword should be ignored. | |
| 767 | 1282 |
| 1 | 1283 static int |
| 4867 | 1284 is_keyword_token (const std::string& s) |
| 1 | 1285 { |
| 3805 | 1286 int l = input_line_number; |
| 1287 int c = current_input_column; | |
| 1288 | |
| 1823 | 1289 int len = s.length (); |
| 922 | 1290 |
| 5088 | 1291 const octave_kw *kw = octave_kw_hash::in_word_set (s.c_str (), len); |
| 191 | 1292 |
| 1497 | 1293 if (kw) |
| 143 | 1294 { |
| 1497 | 1295 yylval.tok_val = 0; |
| 1296 | |
| 1297 switch (kw->kw_id) | |
| 1298 { | |
| 1299 case break_kw: | |
| 2764 | 1300 case case_kw: |
| 1497 | 1301 case catch_kw: |
| 1302 case continue_kw: | |
| 1303 case else_kw: | |
| 1304 case elseif_kw: | |
| 1305 case global_kw: | |
| 2764 | 1306 case otherwise_kw: |
| 1497 | 1307 case return_kw: |
| 2846 | 1308 case static_kw: |
| 3484 | 1309 case until_kw: |
| 1497 | 1310 case unwind_protect_cleanup_kw: |
| 1311 break; | |
| 1312 | |
| 1313 case end_kw: | |
|
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1314 if (lexer_flags.looking_at_object_index |
|
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1315 || (lexer_flags.defining_func |
|
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1316 && ! (lexer_flags.looking_at_return_list |
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1317 || lexer_flags.parsed_function_name))) |
| 4234 | 1318 return 0; |
| 1319 else | |
| 4238 | 1320 { |
| 1321 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1322 return -1; | |
| 1323 else | |
| 1324 { | |
| 1325 yylval.tok_val = new token (token::simple_end, l, c); | |
| 1326 end_tokens_expected--; | |
| 1327 } | |
| 1328 } | |
| 1497 | 1329 break; |
| 1330 | |
| 1331 case end_try_catch_kw: | |
| 4238 | 1332 end_tokens_expected--; |
| 1497 | 1333 yylval.tok_val = new token (token::try_catch_end, l, c); |
| 1334 break; | |
| 1335 | |
| 1336 case end_unwind_protect_kw: | |
| 4238 | 1337 end_tokens_expected--; |
| 1497 | 1338 yylval.tok_val = new token (token::unwind_protect_end, l, c); |
| 1339 break; | |
| 1340 | |
| 1341 case endfor_kw: | |
| 4238 | 1342 end_tokens_expected--; |
| 1497 | 1343 yylval.tok_val = new token (token::for_end, l, c); |
| 1344 break; | |
| 1345 | |
| 1346 case endfunction_kw: | |
| 4238 | 1347 { |
| 1348 if (reading_fcn_file && end_tokens_expected == 1) | |
| 1349 return -1; | |
| 1350 else | |
| 1351 { | |
| 1352 yylval.tok_val = new token (token::function_end, l, c); | |
| 1353 end_tokens_expected--; | |
| 1354 } | |
| 1355 } | |
| 1497 | 1356 break; |
| 1357 | |
| 1358 case endif_kw: | |
| 4238 | 1359 end_tokens_expected--; |
| 1497 | 1360 yylval.tok_val = new token (token::if_end, l, c); |
| 1361 break; | |
| 1362 | |
| 2764 | 1363 case endswitch_kw: |
| 4238 | 1364 end_tokens_expected--; |
| 2764 | 1365 yylval.tok_val = new token (token::switch_end, l, c); |
| 1366 break; | |
| 1367 | |
| 1497 | 1368 case endwhile_kw: |
| 4238 | 1369 end_tokens_expected--; |
| 1497 | 1370 yylval.tok_val = new token (token::while_end, l, c); |
| 1371 break; | |
| 1372 | |
| 1373 case for_kw: | |
| 1374 case while_kw: | |
| 4238 | 1375 end_tokens_expected++; |
| 1376 // Fall through... | |
| 1377 | |
| 1378 case do_kw: | |
| 1497 | 1379 promptflag--; |
| 1826 | 1380 lexer_flags.looping++; |
| 1497 | 1381 break; |
| 1382 | |
| 1383 case if_kw: | |
| 1384 case try_kw: | |
| 2764 | 1385 case switch_kw: |
| 1497 | 1386 case unwind_protect_kw: |
| 4238 | 1387 end_tokens_expected++; |
| 1497 | 1388 promptflag--; |
| 1389 break; | |
| 1390 | |
| 1391 case function_kw: | |
| 4238 | 1392 { |
| 1393 if (lexer_flags.defining_func) | |
| 1394 { | |
| 1395 if (reading_fcn_file) | |
| 1396 { | |
| 1397 if (lexer_flags.parsing_nested_function) | |
| 1398 { | |
| 4323 | 1399 BEGIN (NESTED_FUNCTION_END); |
| 4240 | 1400 |
| 4238 | 1401 yylval.tok_val = new token (token::function_end, l, c); |
| 4240 | 1402 token_stack.push (yylval.tok_val); |
| 1403 | |
| 1404 return END; | |
| 4238 | 1405 } |
| 1406 else | |
| 1407 { | |
| 1408 prep_for_nested_function (); | |
| 4240 | 1409 |
| 4238 | 1410 return FCN; |
| 1411 } | |
| 1412 } | |
| 1413 else | |
| 1414 { | |
| 1415 error ("nested functions not implemented in this context"); | |
| 1416 | |
| 1417 if ((reading_fcn_file || reading_script_file) | |
| 1418 && ! curr_fcn_file_name.empty ()) | |
| 1419 error ("near line %d of file `%s.m'", | |
| 1420 input_line_number, curr_fcn_file_name.c_str ()); | |
| 1421 else | |
| 1422 error ("near line %d", input_line_number); | |
| 1423 | |
| 1424 return LEXICAL_ERROR; | |
| 1425 } | |
| 1426 } | |
| 1427 else | |
| 1428 prep_for_function (); | |
| 1429 } | |
| 1497 | 1430 break; |
| 1431 | |
| 3174 | 1432 case magic_file_kw: |
| 1433 { | |
| 1434 if ((reading_fcn_file || reading_script_file) | |
| 1435 && ! curr_fcn_file_full_name.empty ()) | |
| 1436 yylval.tok_val = new token (curr_fcn_file_full_name, l, c); | |
| 1437 else | |
| 1438 yylval.tok_val = new token ("stdin", l, c); | |
| 1439 } | |
| 1440 break; | |
| 1441 | |
| 1442 case magic_line_kw: | |
| 1443 yylval.tok_val = new token (static_cast<double> (l), "", l, c); | |
| 1444 break; | |
| 1445 | |
| 1497 | 1446 default: |
| 1447 panic_impossible (); | |
| 1448 } | |
| 1449 | |
| 1450 if (! yylval.tok_val) | |
| 1451 yylval.tok_val = new token (l, c); | |
| 1452 | |
| 476 | 1453 token_stack.push (yylval.tok_val); |
| 1497 | 1454 |
| 1455 return kw->tok; | |
| 143 | 1456 } |
| 1 | 1457 |
| 1458 return 0; | |
| 1459 } | |
| 1460 | |
| 2702 | 1461 static bool |
| 3523 | 1462 is_variable (const std::string& name) |
| 2702 | 1463 { |
|
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|
1464 return (symbol_table::is_variable (name) |
|
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1465 || (lexer_flags.pending_local_variables.find (name) |
|
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|
1466 != lexer_flags.pending_local_variables.end ())); |
| 2702 | 1467 } |
| 1468 | |
|
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|
1469 void |
| 3523 | 1470 force_local_variable (const std::string& name) |
| 2702 | 1471 { |
| 7336 | 1472 octave_value& val = symbol_table::varref (name); |
| 1473 | |
| 1474 if (! val.is_defined ()) | |
| 1475 val = Matrix (); | |
| 2702 | 1476 } |
| 1477 | |
|
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|
1478 static std::string |
|
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|
1479 grab_block_comment (stream_reader& reader, bool& eof) |
|
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|
1480 { |
|
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|
1481 std::string buf; |
|
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1482 |
|
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|
1483 bool at_bol = true; |
|
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|
1484 bool look_for_marker = false; |
|
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1485 |
|
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|
1486 bool warned_incompatible = false; |
|
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1487 |
|
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1488 int c = 0; |
|
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1489 |
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1490 while ((c = reader.getc ()) != EOF) |
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1491 { |
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|
1492 current_input_column++; |
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1493 |
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1494 if (look_for_marker) |
|
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1495 { |
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1496 at_bol = false; |
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1497 look_for_marker = false; |
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1498 |
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1499 if (c == '{' || c == '}') |
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1500 { |
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1501 std::string tmp_buf (1, static_cast<char> (c)); |
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1502 |
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1503 int type = c; |
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1504 |
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1505 bool done = false; |
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1506 |
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1507 while ((c = reader.getc ()) != EOF && ! done) |
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|
1508 { |
|
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|
1509 current_input_column++; |
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|
1510 |
|
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1511 switch (c) |
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1512 { |
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1513 case ' ': |
|
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1514 case '\t': |
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1515 tmp_buf += static_cast<char> (c); |
|
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|
1516 break; |
|
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|
1517 |
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1518 case '\n': |
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1519 { |
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1520 current_input_column = 0; |
|
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1521 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1522 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1523 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1524 if (type == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1525 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1526 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1527 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1528 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1529 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1530 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1531 block_comment_nesting_level--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1532 promptflag++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1533 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1534 if (block_comment_nesting_level == 0) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1535 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1536 buf += grab_comment_block (reader, true, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1537 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1538 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1539 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1540 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1541 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1542 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1543 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1544 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1545 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1546 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1547 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1548 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1549 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1550 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1551 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1552 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1553 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1554 |
|
7898
cce16b4e0970
lex.l (grab_block_comment): Use parens around || expression within && expression
John W. Eaton <jwe@octave.org>
parents:
7728
diff
changeset
|
1555 if (at_bol && (c == '%' || c == '#')) |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1556 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1557 if (c == '#' && ! warned_incompatible) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1558 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1559 warned_incompatible = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1560 maybe_gripe_matlab_incompatible_comment (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1561 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1562 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1563 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1564 look_for_marker = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1565 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1566 else |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1567 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1568 buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1569 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1570 if (c == '\n') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1571 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1572 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1573 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1574 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1575 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1576 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1577 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1578 if (c == EOF) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1579 eof = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1580 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1581 return buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1582 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1583 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1584 std::string |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1585 grab_comment_block (stream_reader& reader, bool at_bol, |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1586 bool& eof) |
| 1 | 1587 { |
| 4426 | 1588 std::string buf; |
| 1019 | 1589 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1590 // TRUE means we are at the beginning of a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1591 bool begin_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1592 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1593 // TRUE means we are currently reading a comment block. |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1594 bool in_comment = false; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1595 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1596 bool warned_incompatible = false; |
| 3665 | 1597 |
| 1019 | 1598 int c = 0; |
| 1 | 1599 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1600 while ((c = reader.getc ()) != EOF) |
| 1019 | 1601 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1602 current_input_column++; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1603 |
| 2300 | 1604 if (begin_comment) |
| 1605 { | |
| 1606 if (c == '%' || c == '#') | |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1607 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1608 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1609 continue; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1610 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1611 else if (at_bol && c == '{') |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1612 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1613 std::string tmp_buf (1, static_cast<char> (c)); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1614 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1615 bool done = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1616 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1617 while ((c = reader.getc ()) != EOF && ! done) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1618 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1619 current_input_column++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1620 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1621 switch (c) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1622 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1623 case ' ': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1624 case '\t': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1625 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1626 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1627 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1628 case '\n': |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1629 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1630 current_input_column = 0; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1631 at_bol = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1632 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1633 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1634 block_comment_nesting_level++; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1635 promptflag--; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1636 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1637 buf += grab_block_comment (reader, eof); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1638 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1639 in_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1640 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1641 if (eof) |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1642 goto done; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1643 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1644 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1645 |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1646 default: |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1647 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1648 tmp_buf += static_cast<char> (c); |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1649 buf += tmp_buf; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1650 done = true; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1651 break; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1652 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1653 } |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1654 } |
| 2300 | 1655 else |
|
7723
74f5e0c7de9e
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John W. Eaton <jwe@octave.org>
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7722
diff
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|
1656 { |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1657 at_bol = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
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|
1658 begin_comment = false; |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7722
diff
changeset
|
1659 } |
| 2300 | 1660 } |
| 1661 | |
| 1019 | 1662 if (in_comment) |
| 1 | 1663 { |
| 4426 | 1664 buf += static_cast<char> (c); |
| 1755 | 1665 |
| 1019 | 1666 if (c == '\n') |
| 3427 | 1667 { |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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7722
diff
changeset
|
1668 at_bol = true; |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1669 current_input_column = 0; |
| 3427 | 1670 in_comment = false; |
| 1671 } | |
| 1019 | 1672 } |
| 1673 else | |
| 1674 { | |
| 1675 switch (c) | |
| 991 | 1676 { |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1677 case ' ': |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
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changeset
|
1678 case '\t': |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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|
1679 break; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1680 |
| 4037 | 1681 case '#': |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1682 if (! warned_incompatible) |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
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|
1683 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1684 warned_incompatible = true; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1685 maybe_gripe_matlab_incompatible_comment (c); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
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|
1686 } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1687 // fall through... |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1688 |
| 1019 | 1689 case '%': |
| 2300 | 1690 in_comment = true; |
| 1691 begin_comment = true; | |
| 1019 | 1692 break; |
| 777 | 1693 |
| 1019 | 1694 default: |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1695 current_input_column--; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
1696 reader.ungetc (c); |
| 1019 | 1697 goto done; |
| 1 | 1698 } |
| 1699 } | |
| 1019 | 1700 } |
| 991 | 1701 |
| 1019 | 1702 done: |
| 991 | 1703 |
|
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parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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7634
diff
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|
1704 if (c == EOF) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
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|
1705 eof = true; |
|
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parse scripts completely before executing
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diff
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|
1706 |
| 4426 | 1707 return buf; |
| 1 | 1708 } |
| 1709 | |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1710 class |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1711 flex_stream_reader : public stream_reader |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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changeset
|
1712 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1713 public: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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7715
diff
changeset
|
1714 flex_stream_reader (char *buf_arg) : stream_reader (), buf (buf_arg) { } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1715 |
|
7728
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|
1716 int getc (void) { return ::text_yyinput (); } |
|
8447
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make input_line_number work again
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|
1717 int ungetc (int c) { ::xunput (c, buf); return 0; } |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1718 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1719 private: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1720 char *buf; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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changeset
|
1721 }; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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|
1722 |
|
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John W. Eaton <jwe@octave.org>
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|
1723 static int |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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|
1724 process_comment (bool start_in_block, bool& eof) |
|
7715
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John W. Eaton <jwe@octave.org>
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7634
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|
1725 { |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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|
1726 eof = false; |
|
5b4d278ec828
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|
1727 |
|
5b4d278ec828
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|
1728 std::string help_txt; |
|
5b4d278ec828
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|
1729 |
|
5b4d278ec828
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|
1730 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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|
1731 help_txt = help_buf.top (); |
|
5b4d278ec828
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|
1732 |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
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changeset
|
1733 flex_stream_reader flex_reader (yytext); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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|
1734 |
|
7723
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John W. Eaton <jwe@octave.org>
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|
1735 // process_comment is only supposed to be called when we are not |
|
74f5e0c7de9e
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John W. Eaton <jwe@octave.org>
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|
1736 // initially looking at a block comment. |
|
74f5e0c7de9e
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|
1737 |
|
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changeset
|
1738 std::string txt = start_in_block |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
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|
1739 ? grab_block_comment (flex_reader, eof) |
|
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|
1740 : grab_comment_block (flex_reader, false, eof); |
|
7720
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John W. Eaton <jwe@octave.org>
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|
1741 |
| 8535 | 1742 if (lexer_debug_flag) |
| 1743 std::cerr << "C: " txt << std::endl; | |
| 1744 | |
|
7715
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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|
1745 if (help_txt.empty () && nesting_level.none ()) |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1746 { |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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changeset
|
1747 if (! help_buf.empty ()) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1748 help_buf.pop (); |
|
5b4d278ec828
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diff
changeset
|
1749 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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changeset
|
1750 help_buf.push (txt); |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1751 } |
|
7720
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unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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changeset
|
1752 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
1753 octave_comment_buffer::append (txt); |
|
7715
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1754 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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changeset
|
1755 current_input_column = 1; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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7634
diff
changeset
|
1756 lexer_flags.quote_is_transpose = false; |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1757 lexer_flags.convert_spaces_to_comma = true; |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
1758 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1759 if (YY_START == COMMAND_START) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
1760 BEGIN (INITIAL); |
|
5b4d278ec828
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diff
changeset
|
1761 |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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|
1762 if (nesting_level.none ()) |
|
5b4d278ec828
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diff
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|
1763 { |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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7634
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changeset
|
1764 lexer_flags.doing_rawcommand = false; |
|
5b4d278ec828
parse scripts completely before executing
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diff
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|
1765 return '\n'; |
|
5b4d278ec828
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diff
changeset
|
1766 } |
|
5b4d278ec828
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|
1767 else if (nesting_level.is_bracket_or_brace ()) |
|
5b4d278ec828
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|
1768 return ';'; |
|
5b4d278ec828
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|
1769 else |
|
5b4d278ec828
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|
1770 return 0; |
|
5b4d278ec828
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changeset
|
1771 } |
|
5b4d278ec828
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|
1772 |
| 767 | 1773 // Return 1 if the given character matches any character in the given |
| 1774 // string. | |
| 1775 | |
| 2857 | 1776 static bool |
| 2804 | 1777 match_any (char c, const char *s) |
| 1 | 1778 { |
| 1779 char tmp; | |
| 1780 while ((tmp = *s++) != '\0') | |
| 1781 { | |
| 1782 if (c == tmp) | |
| 2857 | 1783 return true; |
| 1 | 1784 } |
| 2857 | 1785 return false; |
| 1 | 1786 } |
| 1787 | |
| 767 | 1788 // Given information about the spacing surrounding an operator, |
| 1789 // return 1 if it looks like it should be treated as a binary | |
| 1790 // operator. For example, | |
| 1791 // | |
| 3774 | 1792 // [ 1 + 2 ] or [ 1+ 2] or [ 1+2 ] ==> binary |
| 1793 // | |
| 1794 // [ 1 +2 ] ==> unary | |
| 767 | 1795 |
| 2857 | 1796 static bool |
| 3246 | 1797 looks_like_bin_op (bool spc_prev, int next_char) |
| 1 | 1798 { |
| 3246 | 1799 bool spc_next = (next_char == ' ' || next_char == '\t'); |
| 1800 | |
| 608 | 1801 return ((spc_prev && spc_next) || ! spc_prev); |
| 1 | 1802 } |
| 1803 | |
| 3263 | 1804 // Recognize separators. If the separator is a CRLF pair, it is |
| 1805 // replaced by a single LF. | |
| 1806 | |
| 1807 static bool | |
| 1808 next_token_is_sep_op (void) | |
| 1809 { | |
| 1810 bool retval = false; | |
| 1811 | |
|
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|
1812 int c = text_yyinput (); |
|
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|
1813 |
|
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|
1814 retval = match_any (c, ",;\n]"); |
|
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|
1815 |
|
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|
1816 xunput (c, yytext); |
| 3263 | 1817 |
| 1818 return retval; | |
| 1819 } | |
| 1820 | |
| 767 | 1821 // Try to determine if the next token should be treated as a postfix |
| 1822 // unary operator. This is ugly, but it seems to do the right thing. | |
| 1823 | |
| 2857 | 1824 static bool |
| 3246 | 1825 next_token_is_postfix_unary_op (bool spc_prev) |
| 1 | 1826 { |
| 2857 | 1827 bool un_op = false; |
| 1 | 1828 |
|
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|
1829 int c0 = text_yyinput (); |
| 1 | 1830 |
| 3246 | 1831 if (c0 == '\'' && ! spc_prev) |
| 1832 { | |
| 1833 un_op = true; | |
| 1834 } | |
| 1835 else if (c0 == '.') | |
| 1836 { | |
|
7728
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|
1837 int c1 = text_yyinput (); |
| 3246 | 1838 un_op = (c1 == '\''); |
|
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|
1839 xunput (c1, yytext); |
| 3246 | 1840 } |
| 4613 | 1841 else if (c0 == '+') |
| 1842 { | |
|
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|
1843 int c1 = text_yyinput (); |
| 4613 | 1844 un_op = (c1 == '+'); |
|
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|
1845 xunput (c1, yytext); |
| 4613 | 1846 } |
| 1847 else if (c0 == '-') | |
| 1848 { | |
|
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|
1849 int c1 = text_yyinput (); |
| 4613 | 1850 un_op = (c1 == '-'); |
|
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|
1851 xunput (c1, yytext); |
| 4613 | 1852 } |
| 1 | 1853 |
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1854 xunput (c0, yytext); |
| 1 | 1855 |
| 1856 return un_op; | |
| 1857 } | |
| 1858 | |
| 767 | 1859 // Try to determine if the next token should be treated as a binary |
| 3246 | 1860 // operator. |
| 1521 | 1861 // |
| 3246 | 1862 // This kluge exists because whitespace is not always ignored inside |
| 3774 | 1863 // the square brackets that are used to create matrix objects (though |
| 1864 // spacing only really matters in the cases that can be interpreted | |
| 1865 // either as binary ops or prefix unary ops: currently just +, -). | |
| 1866 // | |
| 3779 | 1867 // Note that a line continuation directly following a + or - operator |
| 1868 // (e.g., the characters '[' 'a' ' ' '+' '\' LFD 'b' ']') will be | |
| 1869 // parsed as a binary operator. | |
| 767 | 1870 |
| 2857 | 1871 static bool |
| 3246 | 1872 next_token_is_bin_op (bool spc_prev) |
| 1 | 1873 { |
| 2857 | 1874 bool bin_op = false; |
| 1 | 1875 |
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1876 int c0 = text_yyinput (); |
| 1 | 1877 |
| 1878 switch (c0) | |
| 1879 { | |
| 777 | 1880 case '+': |
| 1881 case '-': | |
| 3774 | 1882 { |
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1883 int c1 = text_yyinput (); |
| 3774 | 1884 |
| 1885 switch (c1) | |
| 1886 { | |
| 1887 case '+': | |
| 1888 case '-': | |
| 1889 // Unary ops, spacing doesn't matter. | |
| 1890 break; | |
| 1891 | |
| 1892 case '=': | |
| 1893 // Binary ops, spacing doesn't matter. | |
| 1894 bin_op = true; | |
| 1895 break; | |
| 1896 | |
| 1897 default: | |
| 1898 // Could be either, spacing matters. | |
| 1899 bin_op = looks_like_bin_op (spc_prev, c1); | |
| 1900 break; | |
| 1901 } | |
| 1902 | |
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1903 xunput (c1, yytext); |
| 3774 | 1904 } |
| 1905 break; | |
| 1906 | |
| 1907 case ':': | |
| 3246 | 1908 case '/': |
| 1909 case '\\': | |
| 1910 case '^': | |
| 3774 | 1911 // Always a binary op (may also include /=, \=, and ^=). |
| 1912 bin_op = true; | |
| 1276 | 1913 break; |
| 1914 | |
| 3246 | 1915 // .+ .- ./ .\ .^ .* .** |
| 1554 | 1916 case '.': |
| 1917 { | |
|
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1918 int c1 = text_yyinput (); |
| 3246 | 1919 |
| 3774 | 1920 if (match_any (c1, "+-/\\^*")) |
| 1921 // Always a binary op (may also include .+=, .-=, ./=, ...). | |
| 1922 bin_op = true; | |
| 3698 | 1923 else if (! isdigit (c1) && c1 != ' ' && c1 != '\t' && c1 != '.') |
| 3774 | 1924 // A structure element reference is a binary op. |
| 1925 bin_op = true; | |
| 3246 | 1926 |
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1927 xunput (c1, yytext); |
| 1554 | 1928 } |
| 1929 break; | |
| 1930 | |
| 3246 | 1931 // = == & && | || * ** |
| 1932 case '=': | |
| 1 | 1933 case '&': |
| 3246 | 1934 case '|': |
| 1 | 1935 case '*': |
| 3774 | 1936 // Always a binary op (may also include ==, &&, ||, **). |
| 1937 bin_op = true; | |
| 3246 | 1938 break; |
| 1939 | |
| 3774 | 1940 // < <= <> > >= |
| 1 | 1941 case '<': |
| 1942 case '>': | |
| 3774 | 1943 // Always a binary op (may also include <=, <>, >=). |
| 1944 bin_op = true; | |
| 1945 break; | |
| 1946 | |
| 1947 // ~= != | |
| 777 | 1948 case '~': |
| 1949 case '!': | |
| 3246 | 1950 { |
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1951 int c1 = text_yyinput (); |
| 3246 | 1952 |
| 3774 | 1953 // ~ and ! can be unary ops, so require following =. |
| 1954 if (c1 == '=') | |
| 1955 bin_op = true; | |
| 3246 | 1956 |
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1957 xunput (c1, yytext); |
| 3246 | 1958 } |
| 1 | 1959 break; |
| 1960 | |
| 1961 default: | |
| 1276 | 1962 break; |
| 1 | 1963 } |
| 1964 | |
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1965 xunput (c0, yytext); |
| 1 | 1966 |
| 1967 return bin_op; | |
| 1968 } | |
| 1969 | |
| 767 | 1970 // Used to delete trailing white space from tokens. |
| 1971 | |
| 3536 | 1972 static std::string |
| 1 | 1973 strip_trailing_whitespace (char *s) |
| 1974 { | |
| 3523 | 1975 std::string retval = s; |
| 1 | 1976 |
| 1823 | 1977 size_t pos = retval.find_first_of (" \t"); |
| 1 | 1978 |
| 8021 | 1979 if (pos != std::string::npos) |
| 1823 | 1980 retval.resize (pos); |
| 1 | 1981 |
| 1982 return retval; | |
| 1983 } | |
| 1984 | |
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1985 // FIXME -- we need to handle block comments here. |
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1986 |
| 3665 | 1987 static void |
| 1988 scan_for_comments (const char *text) | |
| 1989 { | |
| 1990 std::string comment_buf; | |
| 1991 | |
| 1992 bool in_comment = false; | |
| 1993 bool beginning_of_comment = false; | |
| 1994 | |
| 1995 int len = strlen (text); | |
| 1996 int i = 0; | |
| 1997 | |
| 1998 while (i < len) | |
| 1999 { | |
| 2000 char c = text[i++]; | |
| 2001 | |
| 2002 switch (c) | |
| 2003 { | |
| 2004 case '%': | |
| 2005 case '#': | |
| 2006 if (in_comment) | |
| 2007 { | |
| 2008 if (! beginning_of_comment) | |
| 3802 | 2009 comment_buf += static_cast<char> (c); |
| 3665 | 2010 } |
| 2011 else | |
| 2012 { | |
| 4037 | 2013 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2014 in_comment = true; |
| 2015 beginning_of_comment = true; | |
| 2016 } | |
| 2017 break; | |
| 2018 | |
| 2019 case '\n': | |
| 2020 if (in_comment) | |
| 2021 { | |
| 3802 | 2022 comment_buf += static_cast<char> (c); |
| 3665 | 2023 octave_comment_buffer::append (comment_buf); |
| 2024 comment_buf.resize (0); | |
| 2025 in_comment = false; | |
| 2026 beginning_of_comment = false; | |
| 2027 } | |
| 2028 break; | |
| 2029 | |
| 2030 default: | |
| 2031 if (in_comment) | |
| 2032 { | |
| 3802 | 2033 comment_buf += static_cast<char> (c); |
| 3665 | 2034 beginning_of_comment = false; |
| 2035 } | |
| 2036 break; | |
| 2037 } | |
| 2038 } | |
| 2039 | |
| 2040 if (! comment_buf.empty ()) | |
| 2041 octave_comment_buffer::append (comment_buf); | |
| 2042 } | |
| 2043 | |
| 1001 | 2044 // Discard whitespace, including comments and continuations. |
| 1088 | 2045 // |
| 2046 // Return value is logical OR of the following values: | |
| 2047 // | |
| 1826 | 2048 // ATE_NOTHING : no spaces to eat |
| 1088 | 2049 // ATE_SPACE_OR_TAB : space or tab in input |
| 2050 // ATE_NEWLINE : bare new line in input | |
| 1001 | 2051 |
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2052 // FIXME -- we need to handle block comments here. |
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2053 |
| 1826 | 2054 static yum_yum |
| 975 | 2055 eat_whitespace (void) |
| 2056 { | |
| 1826 | 2057 yum_yum retval = ATE_NOTHING; |
| 3665 | 2058 |
| 2059 std::string comment_buf; | |
| 2060 | |
| 2857 | 2061 bool in_comment = false; |
| 3665 | 2062 bool beginning_of_comment = false; |
| 2063 | |
| 2064 int c = 0; | |
| 2065 | |
|
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2066 while ((c = text_yyinput ()) != EOF) |
| 975 | 2067 { |
| 2068 current_input_column++; | |
| 2069 | |
| 2070 switch (c) | |
| 2071 { | |
| 2072 case ' ': | |
| 2073 case '\t': | |
| 3665 | 2074 if (in_comment) |
| 2075 { | |
| 3802 | 2076 comment_buf += static_cast<char> (c); |
| 3665 | 2077 beginning_of_comment = false; |
| 2078 } | |
| 1088 | 2079 retval |= ATE_SPACE_OR_TAB; |
| 975 | 2080 break; |
| 2081 | |
| 2082 case '\n': | |
| 1088 | 2083 retval |= ATE_NEWLINE; |
| 3665 | 2084 if (in_comment) |
| 2085 { | |
| 3802 | 2086 comment_buf += static_cast<char> (c); |
| 3665 | 2087 octave_comment_buffer::append (comment_buf); |
| 2088 comment_buf.resize (0); | |
| 2089 in_comment = false; | |
| 2090 beginning_of_comment = false; | |
| 2091 } | |
| 975 | 2092 current_input_column = 0; |
| 2093 break; | |
| 2094 | |
| 2095 case '#': | |
| 2096 case '%': | |
| 3665 | 2097 if (in_comment) |
| 2098 { | |
| 2099 if (! beginning_of_comment) | |
| 3802 | 2100 comment_buf += static_cast<char> (c); |
| 3665 | 2101 } |
| 2102 else | |
| 2103 { | |
| 4037 | 2104 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2105 in_comment = true; |
| 2106 beginning_of_comment = true; | |
| 2107 } | |
| 975 | 2108 break; |
| 2109 | |
| 1001 | 2110 case '.': |
| 2111 if (in_comment) | |
| 3665 | 2112 { |
| 3802 | 2113 comment_buf += static_cast<char> (c); |
| 3665 | 2114 beginning_of_comment = false; |
| 2115 break; | |
| 2116 } | |
| 1001 | 2117 else |
| 2118 { | |
| 2119 if (have_ellipsis_continuation ()) | |
| 2120 break; | |
| 2121 else | |
| 2122 goto done; | |
| 2123 } | |
| 2124 | |
| 2125 case '\\': | |
| 2126 if (in_comment) | |
| 3665 | 2127 { |
| 3802 | 2128 comment_buf += static_cast<char> (c); |
| 3665 | 2129 beginning_of_comment = false; |
| 2130 break; | |
| 2131 } | |
| 1001 | 2132 else |
| 2133 { | |
| 3105 | 2134 if (have_continuation ()) |
| 1001 | 2135 break; |
| 2136 else | |
| 2137 goto done; | |
| 2138 } | |
| 2139 | |
| 975 | 2140 default: |
| 2141 if (in_comment) | |
| 3665 | 2142 { |
| 3802 | 2143 comment_buf += static_cast<char> (c); |
| 3665 | 2144 beginning_of_comment = false; |
| 2145 break; | |
| 2146 } | |
| 975 | 2147 else |
| 2148 goto done; | |
| 2149 } | |
| 2150 } | |
| 2151 | |
| 3665 | 2152 if (! comment_buf.empty ()) |
| 2153 octave_comment_buffer::append (comment_buf); | |
| 2154 | |
| 975 | 2155 done: |
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|
2156 xunput (c, yytext); |
| 1082 | 2157 current_input_column--; |
| 1001 | 2158 return retval; |
| 975 | 2159 } |
| 2160 | |
| 3220 | 2161 static inline bool |
| 2162 looks_like_hex (const char *s, int len) | |
| 2163 { | |
| 2164 return (len > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X')); | |
| 2165 } | |
| 2166 | |
| 975 | 2167 static void |
| 3246 | 2168 handle_number (void) |
| 972 | 2169 { |
| 3220 | 2170 double value = 0.0; |
| 2171 int nread = 0; | |
| 2172 | |
| 3598 | 2173 if (looks_like_hex (yytext, strlen (yytext))) |
| 3220 | 2174 { |
| 2175 unsigned long ival; | |
| 3598 | 2176 |
| 2177 nread = sscanf (yytext, "%lx", &ival); | |
| 2178 | |
| 3220 | 2179 value = static_cast<double> (ival); |
| 2180 } | |
| 2181 else | |
| 3598 | 2182 { |
| 2183 char *tmp = strsave (yytext); | |
| 2184 | |
| 2185 char *idx = strpbrk (tmp, "Dd"); | |
| 2621 | 2186 |
| 3598 | 2187 if (idx) |
| 2188 *idx = 'e'; | |
| 2189 | |
| 2190 nread = sscanf (tmp, "%lf", &value); | |
| 2191 | |
| 2192 delete [] tmp; | |
| 2193 } | |
| 972 | 2194 |
| 1826 | 2195 // If yytext doesn't contain a valid number, we are in deep doo doo. |
| 985 | 2196 |
| 972 | 2197 assert (nread == 1); |
| 2198 | |
| 3988 | 2199 lexer_flags.quote_is_transpose = true; |
| 2200 lexer_flags.convert_spaces_to_comma = true; | |
| 972 | 2201 |
| 2202 yylval.tok_val = new token (value, yytext, input_line_number, | |
| 2203 current_input_column); | |
| 2204 | |
| 2205 token_stack.push (yylval.tok_val); | |
| 2206 | |
| 2207 current_input_column += yyleng; | |
| 2208 | |
| 2209 do_comma_insert_check (); | |
| 2210 } | |
| 2211 | |
| 1001 | 2212 // We have seen a backslash and need to find out if it should be |
| 2213 // treated as a continuation character. If so, this eats it, up to | |
| 2214 // and including the new line character. | |
| 2215 // | |
| 973 | 2216 // Match whitespace only, followed by a comment character or newline. |
| 2217 // Once a comment character is found, discard all input until newline. | |
| 2218 // If non-whitespace characters are found before comment | |
| 2219 // characters, return 0. Otherwise, return 1. | |
| 2220 | |
|
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2221 // FIXME -- we need to handle block comments here. |
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|
2222 |
| 2857 | 2223 static bool |
| 3096 | 2224 have_continuation (bool trailing_comments_ok) |
| 973 | 2225 { |
| 5765 | 2226 std::ostringstream buf; |
| 973 | 2227 |
| 3665 | 2228 std::string comment_buf; |
| 2229 | |
| 2857 | 2230 bool in_comment = false; |
| 3665 | 2231 bool beginning_of_comment = false; |
| 2232 | |
| 2233 int c = 0; | |
| 2234 | |
|
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|
2235 while ((c = text_yyinput ()) != EOF) |
| 973 | 2236 { |
| 3802 | 2237 buf << static_cast<char> (c); |
| 973 | 2238 |
| 2239 switch (c) | |
| 2240 { | |
| 2241 case ' ': | |
| 2242 case '\t': | |
| 3665 | 2243 if (in_comment) |
| 2244 { | |
| 3802 | 2245 comment_buf += static_cast<char> (c); |
| 3665 | 2246 beginning_of_comment = false; |
| 2247 } | |
| 973 | 2248 break; |
| 2249 | |
| 2250 case '%': | |
| 2251 case '#': | |
| 1091 | 2252 if (trailing_comments_ok) |
| 3665 | 2253 { |
| 2254 if (in_comment) | |
| 2255 { | |
| 2256 if (! beginning_of_comment) | |
| 3802 | 2257 comment_buf += static_cast<char> (c); |
| 3665 | 2258 } |
| 2259 else | |
| 2260 { | |
| 4037 | 2261 maybe_gripe_matlab_incompatible_comment (c); |
| 3665 | 2262 in_comment = true; |
| 2263 beginning_of_comment = true; | |
| 2264 } | |
| 2265 } | |
| 1091 | 2266 else |
| 2267 goto cleanup; | |
| 973 | 2268 break; |
| 2269 | |
| 2270 case '\n': | |
| 3665 | 2271 if (in_comment) |
| 2272 { | |
| 3802 | 2273 comment_buf += static_cast<char> (c); |
| 3665 | 2274 octave_comment_buffer::append (comment_buf); |
| 2275 } | |
| 975 | 2276 current_input_column = 0; |
| 1001 | 2277 promptflag--; |
| 4037 | 2278 gripe_matlab_incompatible_continuation (); |
| 2857 | 2279 return true; |
| 973 | 2280 |
| 2281 default: | |
| 3665 | 2282 if (in_comment) |
| 2283 { | |
| 3802 | 2284 comment_buf += static_cast<char> (c); |
| 3665 | 2285 beginning_of_comment = false; |
| 2286 } | |
| 2287 else | |
| 1091 | 2288 goto cleanup; |
| 2289 break; | |
| 973 | 2290 } |
| 2291 } | |
| 2292 | |
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|
2293 xunput (c, yytext); |
| 2857 | 2294 return false; |
| 973 | 2295 |
| 3096 | 2296 cleanup: |
| 4051 | 2297 |
| 5765 | 2298 std::string s = buf.str (); |
| 4051 | 2299 |
| 2300 int len = s.length (); | |
| 2301 while (len--) | |
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2302 xunput (s[len], yytext); |
| 3096 | 2303 |
| 2857 | 2304 return false; |
| 973 | 2305 } |
| 2306 | |
| 1001 | 2307 // We have seen a `.' and need to see if it is the start of a |
| 2308 // continuation. If so, this eats it, up to and including the new | |
| 2309 // line character. | |
| 2310 | |
| 2857 | 2311 static bool |
| 3096 | 2312 have_ellipsis_continuation (bool trailing_comments_ok) |
| 973 | 2313 { |
|
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2314 char c1 = text_yyinput (); |
| 973 | 2315 if (c1 == '.') |
| 2316 { | |
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2317 char c2 = text_yyinput (); |
| 1091 | 2318 if (c2 == '.' && have_continuation (trailing_comments_ok)) |
| 2857 | 2319 return true; |
| 973 | 2320 else |
| 2321 { | |
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2322 xunput (c2, yytext); |
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2323 xunput (c1, yytext); |
| 973 | 2324 } |
| 2325 } | |
| 2326 else | |
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2327 xunput (c1, yytext); |
| 973 | 2328 |
| 2857 | 2329 return false; |
| 973 | 2330 } |
| 2331 | |
| 1001 | 2332 // See if we have a continuation line. If so, eat it and the leading |
| 2333 // whitespace on the next line. | |
| 1088 | 2334 // |
| 2335 // Return value is the same as described for eat_whitespace(). | |
| 1001 | 2336 |
| 1826 | 2337 static yum_yum |
| 1001 | 2338 eat_continuation (void) |
| 2339 { | |
| 1826 | 2340 int retval = ATE_NOTHING; |
| 3665 | 2341 |
|
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2342 int c = text_yyinput (); |
| 3665 | 2343 |
| 1001 | 2344 if ((c == '.' && have_ellipsis_continuation ()) |
| 3105 | 2345 || (c == '\\' && have_continuation ())) |
| 1001 | 2346 retval = eat_whitespace (); |
| 2347 else | |
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2348 xunput (c, yytext); |
| 1001 | 2349 |
| 2350 return retval; | |
| 2351 } | |
| 2352 | |
| 973 | 2353 static int |
| 975 | 2354 handle_string (char delim, int text_style) |
| 973 | 2355 { |
| 5765 | 2356 std::ostringstream buf; |
| 973 | 2357 |
| 3805 | 2358 int bos_line = input_line_number; |
| 2359 int bos_col = current_input_column; | |
| 2360 | |
| 973 | 2361 int c; |
| 1031 | 2362 int escape_pending = 0; |
| 973 | 2363 |
|
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|
2364 while ((c = text_yyinput ()) != EOF) |
| 973 | 2365 { |
| 2366 current_input_column++; | |
| 2367 | |
| 3105 | 2368 if (c == '\\') |
| 973 | 2369 { |
| 5359 | 2370 if (delim == '\'' || escape_pending) |
| 1053 | 2371 { |
| 3802 | 2372 buf << static_cast<char> (c); |
| 1053 | 2373 escape_pending = 0; |
| 2374 } | |
| 2375 else | |
| 2376 { | |
| 3096 | 2377 if (have_continuation (false)) |
| 1053 | 2378 escape_pending = 0; |
| 2379 else | |
| 2380 { | |
| 3802 | 2381 buf << static_cast<char> (c); |
| 1053 | 2382 escape_pending = 1; |
| 2383 } | |
| 2384 } | |
| 1031 | 2385 continue; |
| 973 | 2386 } |
| 2387 else if (c == '.') | |
| 2388 { | |
| 5359 | 2389 if (delim == '\'' || ! have_ellipsis_continuation (false)) |
| 3802 | 2390 buf << static_cast<char> (c); |
| 973 | 2391 } |
| 2392 else if (c == '\n') | |
| 2393 { | |
| 1053 | 2394 error ("unterminated string constant"); |
| 973 | 2395 break; |
| 2396 } | |
| 2397 else if (c == delim) | |
| 2398 { | |
| 1031 | 2399 if (escape_pending) |
| 3802 | 2400 buf << static_cast<char> (c); |
| 973 | 2401 else |
| 2402 { | |
|
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2403 c = text_yyinput (); |
| 973 | 2404 if (c == delim) |
| 5102 | 2405 { |
| 2406 buf << static_cast<char> (c); | |
| 2407 if (lexer_flags.doing_rawcommand) | |
| 2408 buf << static_cast<char> (c); | |
| 2409 } | |
| 973 | 2410 else |
| 2411 { | |
| 5102 | 2412 std::string s; |
|
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2413 xunput (c, yytext); |
| 5765 | 2414 |
| 5279 | 2415 if (lexer_flags.doing_rawcommand || delim == '\'') |
| 5765 | 2416 s = buf.str (); |
| 5102 | 2417 else |
| 5765 | 2418 s = do_string_escapes (buf.str ()); |
| 975 | 2419 |
| 5102 | 2420 if (text_style && lexer_flags.doing_rawcommand) |
| 2421 s = std::string (1, delim) + s + std::string (1, delim); | |
| 975 | 2422 else |
| 2423 { | |
| 2857 | 2424 lexer_flags.quote_is_transpose = true; |
| 2425 lexer_flags.convert_spaces_to_comma = true; | |
| 975 | 2426 } |
| 2427 | |
| 3805 | 2428 yylval.tok_val = new token (s, bos_line, bos_col); |
| 973 | 2429 token_stack.push (yylval.tok_val); |
| 3400 | 2430 |
| 4037 | 2431 if (delim == '"') |
| 2432 gripe_matlab_incompatible ("\" used as string delimiter"); | |
| 2433 else if (delim == '\'') | |
| 3400 | 2434 gripe_single_quote_string (); |
| 2435 | |
| 5279 | 2436 return delim == '"' ? DQ_STRING : SQ_STRING; |
| 973 | 2437 } |
| 2438 } | |
| 2439 } | |
| 2440 else | |
| 2441 { | |
| 3802 | 2442 buf << static_cast<char> (c); |
| 973 | 2443 } |
| 2444 | |
| 1031 | 2445 escape_pending = 0; |
| 973 | 2446 } |
| 2447 | |
| 2448 return LEXICAL_ERROR; | |
| 2449 } | |
| 2450 | |
| 3208 | 2451 static bool |
| 2452 next_token_is_assign_op (void) | |
| 2453 { | |
| 2454 bool retval = false; | |
| 2455 | |
|
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2456 int c0 = text_yyinput (); |
| 3208 | 2457 |
| 2458 switch (c0) | |
| 2459 { | |
| 2460 case '=': | |
| 2461 { | |
|
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2462 int c1 = text_yyinput (); |
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2463 xunput (c1, yytext); |
| 3208 | 2464 if (c1 != '=') |
| 2465 retval = true; | |
| 2466 } | |
| 2467 break; | |
| 2468 | |
| 2469 case '+': | |
| 2470 case '-': | |
| 2471 case '*': | |
| 2472 case '/': | |
| 2473 case '\\': | |
| 2474 case '&': | |
| 2475 case '|': | |
| 2476 { | |
|
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2477 int c1 = text_yyinput (); |
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2478 xunput (c1, yytext); |
| 3208 | 2479 if (c1 == '=') |
| 2480 retval = true; | |
| 2481 } | |
| 2482 break; | |
| 2483 | |
| 2484 case '.': | |
| 2485 { | |
|
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2486 int c1 = text_yyinput (); |
| 3208 | 2487 if (match_any (c1, "+-*/\\")) |
| 2488 { | |
|
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2489 int c2 = text_yyinput (); |
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2490 xunput (c2, yytext); |
| 3208 | 2491 if (c2 == '=') |
| 2492 retval = true; | |
| 2493 } | |
|
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2494 xunput (c1, yytext); |
| 3208 | 2495 } |
| 2496 break; | |
| 2497 | |
| 2498 case '>': | |
| 2499 { | |
|
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2500 int c1 = text_yyinput (); |
| 3208 | 2501 if (c1 == '>') |
| 2502 { | |
|
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2503 int c2 = text_yyinput (); |
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2504 xunput (c2, yytext); |
| 3208 | 2505 if (c2 == '=') |
| 2506 retval = true; | |
| 2507 } | |
|
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2508 xunput (c1, yytext); |
| 3208 | 2509 } |
| 2510 break; | |
| 2511 | |
| 2512 case '<': | |
| 2513 { | |
|
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2514 int c1 = text_yyinput (); |
| 3208 | 2515 if (c1 == '<') |
| 2516 { | |
|
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2517 int c2 = text_yyinput (); |
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2518 xunput (c2, yytext); |
| 3208 | 2519 if (c2 == '=') |
| 2520 retval = true; | |
| 2521 } | |
|
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2522 xunput (c1, yytext); |
| 3208 | 2523 } |
| 2524 break; | |
| 2525 | |
| 2526 default: | |
| 2527 break; | |
| 2528 } | |
| 2529 | |
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2530 xunput (c0, yytext); |
| 3208 | 2531 |
| 2532 return retval; | |
| 2533 } | |
| 2534 | |
| 4633 | 2535 static bool |
| 2536 next_token_is_index_op (void) | |
| 2537 { | |
|
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2538 int c = text_yyinput (); |
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2539 xunput (c, yytext); |
| 4633 | 2540 return c == '(' || c == '{'; |
| 2541 } | |
| 2542 | |
| 4612 | 2543 static int |
| 2544 handle_close_bracket (bool spc_gobbled, int bracket_type) | |
| 971 | 2545 { |
| 4612 | 2546 int retval = bracket_type; |
| 3208 | 2547 |
| 1826 | 2548 if (! nesting_level.none ()) |
| 971 | 2549 { |
| 1826 | 2550 nesting_level.remove (); |
| 4613 | 2551 |
| 2552 if (bracket_type == ']') | |
| 2553 lexer_flags.bracketflag--; | |
| 2554 else if (bracket_type == '}') | |
| 2555 lexer_flags.braceflag--; | |
| 2556 else | |
| 2557 panic_impossible (); | |
| 971 | 2558 } |
| 2559 | |
| 4613 | 2560 if (lexer_flags.bracketflag == 0 && lexer_flags.braceflag == 0) |
| 4323 | 2561 BEGIN (INITIAL); |
| 1001 | 2562 |
| 4608 | 2563 if (bracket_type == ']' |
| 2564 && next_token_is_assign_op () | |
| 2565 && ! lexer_flags.looking_at_return_list) | |
| 971 | 2566 { |
| 3208 | 2567 retval = CLOSE_BRACE; |
| 971 | 2568 } |
| 4613 | 2569 else if ((lexer_flags.bracketflag || lexer_flags.braceflag) |
| 2570 && lexer_flags.convert_spaces_to_comma | |
| 2571 && (nesting_level.is_bracket () | |
| 2572 || (nesting_level.is_brace () | |
| 2573 && ! lexer_flags.looking_at_object_index))) | |
| 971 | 2574 { |
| 4633 | 2575 bool index_op = next_token_is_index_op (); |
| 2576 | |
| 2577 // Don't insert comma if we are looking at something like | |
| 2578 // | |
| 2579 // [x{i}{j}] or [x{i}(j)] | |
| 2580 // | |
| 2581 // but do if we are looking at | |
| 2582 // | |
| 2583 // [x{i} {j}] or [x{i} (j)] | |
| 2584 | |
| 2585 if (spc_gobbled || ! (bracket_type == '}' && index_op)) | |
| 971 | 2586 { |
| 4633 | 2587 bool bin_op = next_token_is_bin_op (spc_gobbled); |
| 2588 | |
| 2589 bool postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); | |
| 2590 | |
| 2591 bool sep_op = next_token_is_sep_op (); | |
| 2592 | |
| 2593 if (! (postfix_un_op || bin_op || sep_op)) | |
| 2594 { | |
| 2595 maybe_warn_separator_insert (','); | |
| 2596 | |
| 2597 yyunput (',', yytext); | |
| 2598 return retval; | |
| 2599 } | |
| 971 | 2600 } |
| 2601 } | |
| 2602 | |
| 2857 | 2603 lexer_flags.quote_is_transpose = true; |
| 2604 lexer_flags.convert_spaces_to_comma = true; | |
| 3208 | 2605 |
| 2606 return retval; | |
| 971 | 2607 } |
| 2608 | |
| 1072 | 2609 static void |
| 2610 maybe_unput_comma (int spc_gobbled) | |
| 2611 { | |
| 4613 | 2612 if (nesting_level.is_bracket () |
| 2613 || (nesting_level.is_brace () | |
| 2614 && ! lexer_flags.looking_at_object_index)) | |
| 1072 | 2615 { |
| 3246 | 2616 int bin_op = next_token_is_bin_op (spc_gobbled); |
| 1072 | 2617 |
| 3246 | 2618 int postfix_un_op = next_token_is_postfix_unary_op (spc_gobbled); |
| 1072 | 2619 |
|
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2620 int c1 = text_yyinput (); |
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2621 int c2 = text_yyinput (); |
| 2970 | 2622 |
|
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2623 xunput (c2, yytext); |
|
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2624 xunput (c1, yytext); |
| 2970 | 2625 |
| 3263 | 2626 int sep_op = next_token_is_sep_op (); |
| 2970 | 2627 |
| 1072 | 2628 int dot_op = (c1 == '.' |
| 2629 && (isalpha (c2) || isspace (c2) || c2 == '_')); | |
| 2970 | 2630 |
| 3388 | 2631 if (postfix_un_op || bin_op || sep_op || dot_op) |
| 2632 return; | |
| 2633 | |
| 3985 | 2634 int index_op = (c1 == '(' || c1 == '{'); |
| 3388 | 2635 |
| 4476 | 2636 // If there is no space before the indexing op, we don't insert |
| 2637 // a comma. | |
| 2638 | |
| 2639 if (index_op && ! spc_gobbled) | |
| 2640 return; | |
| 2641 | |
| 2642 maybe_warn_separator_insert (','); | |
| 2643 | |
| 2644 yyunput (',', yytext); | |
| 1072 | 2645 } |
| 2646 } | |
| 2647 | |
| 767 | 2648 // Figure out exactly what kind of token to return when we have seen |
| 4238 | 2649 // an identifier. Handles keywords. Return -1 if the identifier |
| 2650 // should be ignored. | |
| 767 | 2651 |
| 146 | 2652 static int |
| 3974 | 2653 handle_identifier (void) |
| 146 | 2654 { |
| 3974 | 2655 std::string tok = strip_trailing_whitespace (yytext); |
| 2656 | |
| 2657 int c = yytext[yyleng-1]; | |
| 2658 | |
| 2659 int cont_is_spc = eat_continuation (); | |
| 2660 | |
| 2661 int spc_gobbled = (cont_is_spc || c == ' ' || c == '\t'); | |
| 2662 | |
| 2970 | 2663 // If we are expecting a structure element, avoid recognizing |
| 2664 // keywords and other special names and return STRUCT_ELT, which is | |
| 2665 // a string that is also a valid identifier. But first, we have to | |
| 2666 // decide whether to insert a comma. | |
| 747 | 2667 |
| 1826 | 2668 if (lexer_flags.looking_at_indirect_ref) |
| 1072 | 2669 { |
| 2970 | 2670 do_comma_insert_check (); |
| 2671 | |
| 1072 | 2672 maybe_unput_comma (spc_gobbled); |
| 2819 | 2673 |
| 2674 yylval.tok_val = new token (tok, input_line_number, | |
| 2675 current_input_column); | |
| 2676 | |
| 2677 token_stack.push (yylval.tok_val); | |
| 2678 | |
| 2857 | 2679 lexer_flags.quote_is_transpose = true; |
| 2680 lexer_flags.convert_spaces_to_comma = true; | |
| 2819 | 2681 |
| 2682 current_input_column += yyleng; | |
| 2683 | |
| 2970 | 2684 return STRUCT_ELT; |
| 1072 | 2685 } |
| 747 | 2686 |
| 4930 | 2687 int kw_token = is_keyword_token (tok); |
| 2688 | |
| 2689 if (lexer_flags.looking_at_function_handle) | |
| 2690 { | |
| 2691 if (kw_token) | |
| 2692 { | |
| 2693 error ("function handles may not refer to keywords"); | |
| 2694 | |
| 2695 return LEXICAL_ERROR; | |
| 2696 } | |
| 2697 else | |
|
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2698 { |
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2699 yylval.tok_val = new token (tok, input_line_number, |
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2700 current_input_column); |
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2701 |
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2702 token_stack.push (yylval.tok_val); |
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2703 |
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2704 current_input_column += yyleng; |
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2705 lexer_flags.quote_is_transpose = false; |
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2706 lexer_flags.convert_spaces_to_comma = true; |
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2707 |
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2708 return FCN_HANDLE; |
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2709 } |
| 4930 | 2710 } |
| 2711 | |
| 5102 | 2712 // If we have a regular keyword, return it. |
|
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2713 // Keywords can be followed by identifiers. |
| 146 | 2714 |
| 2715 if (kw_token) | |
| 2716 { | |
|
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2717 if (kw_token >= 0) |
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2718 { |
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2719 current_input_column += yyleng; |
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2720 lexer_flags.quote_is_transpose = false; |
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2721 lexer_flags.convert_spaces_to_comma = true; |
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2722 } |
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2723 |
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2724 return kw_token; |
| 146 | 2725 } |
| 2726 | |
| 1826 | 2727 // See if we have a plot keyword (title, using, with, or clear). |
| 146 | 2728 |
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2729 int c1 = text_yyinput (); |
| 3480 | 2730 |
| 2731 bool next_tok_is_paren = (c1 == '('); | |
| 2732 | |
| 2733 bool next_tok_is_eq = false; | |
| 2734 if (c1 == '=') | |
| 2735 { | |
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2736 int c2 = text_yyinput (); |
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John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
2737 xunput (c2, yytext); |
| 3480 | 2738 |
| 2739 if (c2 != '=') | |
| 2740 next_tok_is_eq = true; | |
| 2741 } | |
| 2742 | |
|
8447
adab48231a03
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John W. Eaton <jwe@octave.org>
parents:
8312
diff
changeset
|
2743 xunput (c1, yytext); |
| 1001 | 2744 |
| 2702 | 2745 // Kluge alert. |
| 2746 // | |
| 2747 // If we are looking at a text style function, set up to gobble its | |
| 2745 | 2748 // arguments. |
| 2749 // | |
| 2750 // If the following token is `=', or if we are parsing a function | |
| 3189 | 2751 // return list or function parameter list, or if we are looking at |
| 2752 // something like [ab,cd] = foo (), force the symbol to be inserted | |
| 2753 // as a variable in the current symbol table. | |
| 2702 | 2754 |
| 4208 | 2755 if (is_command_name (tok) && ! is_variable (tok)) |
| 2702 | 2756 { |
| 2745 | 2757 if (next_tok_is_eq |
| 2758 || lexer_flags.looking_at_return_list | |
|
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ae90e05ad299
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John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
2759 || (lexer_flags.looking_at_parameter_list |
|
8001
ff9e7873f8ea
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John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2760 && ! lexer_flags.looking_at_initializer_expression)) |
| 2745 | 2761 { |
| 2762 force_local_variable (tok); | |
| 2763 } | |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2764 else if (lexer_flags.looking_at_matrix_or_assign_lhs) |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2765 { |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2766 lexer_flags.pending_local_variables.insert (tok); |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2767 } |
| 6067 | 2768 else if (! (next_tok_is_paren || lexer_flags.looking_at_object_index)) |
| 2702 | 2769 { |
| 5102 | 2770 BEGIN (COMMAND_START); |
| 2771 } | |
| 2772 | |
| 6067 | 2773 if (is_rawcommand_name (tok) && ! lexer_flags.looking_at_object_index) |
| 5102 | 2774 { |
| 2775 lexer_flags.doing_rawcommand = true; | |
| 4323 | 2776 BEGIN (COMMAND_START); |
| 2702 | 2777 } |
| 2778 } | |
| 2779 | |
| 4234 | 2780 // Find the token in the symbol table. Beware the magic |
| 2781 // transformation of the end keyword... | |
| 2782 | |
| 2783 if (tok == "end") | |
| 2784 tok = "__end__"; | |
| 146 | 2785 |
| 7336 | 2786 yylval.tok_val = new token (&(symbol_table::insert (tok)), |
| 2787 input_line_number, current_input_column); | |
| 2788 | |
| 146 | 2789 token_stack.push (yylval.tok_val); |
| 2790 | |
| 1826 | 2791 // After seeing an identifer, it is ok to convert spaces to a comma |
| 2792 // (if needed). | |
| 146 | 2793 |
| 2857 | 2794 lexer_flags.convert_spaces_to_comma = true; |
| 146 | 2795 |
| 2877 | 2796 if (! next_tok_is_eq) |
| 2797 { | |
| 2798 lexer_flags.quote_is_transpose = true; | |
| 146 | 2799 |
| 2877 | 2800 do_comma_insert_check (); |
| 2801 | |
| 2802 maybe_unput_comma (spc_gobbled); | |
| 146 | 2803 } |
| 2804 | |
| 2877 | 2805 current_input_column += yyleng; |
| 146 | 2806 |
| 2807 return NAME; | |
| 2808 } | |
| 2809 | |
| 1826 | 2810 void |
| 2811 lexical_feedback::init (void) | |
| 2812 { | |
| 2813 // Not initially defining a matrix list. | |
| 3351 | 2814 bracketflag = 0; |
| 1826 | 2815 |
| 4613 | 2816 // Not initially defining a cell array list. |
| 2817 braceflag = 0; | |
| 2818 | |
| 1826 | 2819 // Not initially inside a loop or if statement. |
| 2820 looping = 0; | |
| 2821 | |
| 2857 | 2822 // Not initially defining a function. |
| 2823 defining_func = false; | |
| 2877 | 2824 parsed_function_name = false; |
| 4240 | 2825 parsing_nested_function = 0; |
| 7336 | 2826 parsing_class_method = false; |
| 2857 | 2827 |
| 4930 | 2828 // Not initiallly looking at a function handle. |
| 2829 looking_at_function_handle = 0; | |
| 2830 | |
| 2857 | 2831 // Not parsing a function return or parameter list. |
| 2832 looking_at_return_list = false; | |
| 2833 looking_at_parameter_list = false; | |
| 2834 | |
|
7634
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parents:
7587
diff
changeset
|
2835 // Not looking at an argument list initializer expression. |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
2836 looking_at_initializer_expression = false; |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7587
diff
changeset
|
2837 |
| 3796 | 2838 // Not parsing a matrix or the left hand side of multi-value |
| 2839 // assignment statement. | |
| 2840 looking_at_matrix_or_assign_lhs = false; | |
| 2841 | |
| 4234 | 2842 // Not parsing an object index. |
| 4237 | 2843 looking_at_object_index = 0; |
| 4234 | 2844 |
| 2857 | 2845 // No need to do comma insert or convert spaces to comma at |
| 2846 // beginning of input. | |
| 2847 convert_spaces_to_comma = true; | |
| 2848 do_comma_insert = false; | |
| 2849 | |
| 2850 // Not initially doing any plotting or setting of plot attributes. | |
| 5102 | 2851 doing_rawcommand = false; |
| 2857 | 2852 |
| 1826 | 2853 // Not initially looking at indirect references. |
| 2857 | 2854 looking_at_indirect_ref = false; |
| 1826 | 2855 |
| 2856 // Quote marks strings intially. | |
| 2857 | 2857 quote_is_transpose = false; |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7898
diff
changeset
|
2858 |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
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7898
diff
changeset
|
2859 // Set of identifiers that might be local variable names is empty. |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
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7898
diff
changeset
|
2860 pending_local_variables.clear (); |
| 1826 | 2861 } |
| 2862 | |
| 4867 | 2863 bool |
| 2864 is_keyword (const std::string& s) | |
| 2865 { | |
| 5088 | 2866 return octave_kw_hash::in_word_set (s.c_str (), s.length ()) != 0; |
| 4867 | 2867 } |
| 2868 | |
| 4264 | 2869 DEFCMD (iskeyword, args, , |
| 2870 "-*- texinfo -*-\n\ | |
| 2871 @deftypefn {Built-in Function} {} iskeyword (@var{name})\n\ | |
| 2872 Return true if @var{name} is an Octave keyword. If @var{name}\n\ | |
| 2873 is omitted, return a list of keywords.\n\ | |
| 2874 @end deftypefn") | |
| 2875 { | |
| 2876 octave_value retval; | |
| 2877 | |
| 2878 int argc = args.length () + 1; | |
| 2879 | |
| 4867 | 2880 string_vector argv = args.make_argv ("iskeyword"); |
| 4264 | 2881 |
| 2882 if (error_state) | |
| 2883 return retval; | |
| 2884 | |
| 2885 if (argc == 1) | |
| 2886 { | |
| 2887 string_vector lst (TOTAL_KEYWORDS); | |
| 2888 | |
| 2889 for (int i = 0; i < TOTAL_KEYWORDS; i++) | |
| 2890 lst[i] = wordlist[i].name; | |
| 2891 | |
|
8504
0e0bd07e6ae2
omission from last patch
Jaroslav Hajek <highegg@gmail.com>
parents:
8447
diff
changeset
|
2892 retval = Cell (lst.sort ()); |
| 4264 | 2893 } |
| 2894 else if (argc == 2) | |
| 2895 { | |
| 4867 | 2896 retval = is_keyword (argv[1]); |
| 4264 | 2897 } |
| 2898 else | |
| 5823 | 2899 print_usage (); |
| 4264 | 2900 |
| 2901 return retval; | |
| 2902 } | |
| 2903 | |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
2904 void |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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7634
diff
changeset
|
2905 prep_lexer_for_script (void) |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
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diff
changeset
|
2906 { |
|
5b4d278ec828
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2907 BEGIN (SCRIPT_FILE_BEGIN); |
|
5b4d278ec828
parse scripts completely before executing
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7634
diff
changeset
|
2908 } |
| 4264 | 2909 |
| 3388 | 2910 static void |
| 2911 maybe_warn_separator_insert (char sep) | |
| 2912 { | |
| 3523 | 2913 std::string nm = curr_fcn_file_full_name; |
| 3388 | 2914 |
| 5794 | 2915 if (nm.empty ()) |
| 2916 warning_with_id ("Octave:separator-insert", | |
| 2917 "potential auto-insertion of `%c' near line %d", | |
| 2918 sep, input_line_number); | |
| 2919 else | |
| 2920 warning_with_id ("Octave:separator-insert", | |
| 2921 "potential auto-insertion of `%c' near line %d of file %s", | |
| 2922 sep, input_line_number, nm.c_str ()); | |
| 3388 | 2923 } |
| 2924 | |
| 3400 | 2925 static void |
| 2926 gripe_single_quote_string (void) | |
| 2927 { | |
| 3523 | 2928 std::string nm = curr_fcn_file_full_name; |
| 3400 | 2929 |
| 5794 | 2930 if (nm.empty ()) |
| 2931 warning_with_id ("Octave:single-quote-string", | |
| 2932 "single quote delimited string near line %d", | |
| 2933 input_line_number); | |
| 2934 else | |
| 2935 warning_with_id ("Octave:single-quote-string", | |
| 2936 "single quote delimited string near line %d of file %s", | |
| 2937 input_line_number, nm.c_str ()); | |
| 3400 | 2938 } |
| 2939 | |
| 4037 | 2940 static void |
| 2941 gripe_matlab_incompatible (const std::string& msg) | |
| 2942 { | |
| 5794 | 2943 warning_with_id ("Octave:matlab-incompatible", |
| 2944 "potential Matlab compatibility problem: %s", | |
| 2945 msg.c_str ()); | |
| 4037 | 2946 } |
| 2947 | |
| 2948 static void | |
| 2949 maybe_gripe_matlab_incompatible_comment (char c) | |
| 2950 { | |
| 2951 if (c == '#') | |
| 2952 gripe_matlab_incompatible ("# used as comment character"); | |
| 2953 } | |
| 2954 | |
| 2955 static void | |
| 2956 gripe_matlab_incompatible_continuation (void) | |
| 2957 { | |
| 2958 gripe_matlab_incompatible ("\\ used as line continuation marker"); | |
| 2959 } | |
| 2960 | |
| 2961 static void | |
| 2962 gripe_matlab_incompatible_operator (const std::string& op) | |
| 2963 { | |
| 2964 std::string t = op; | |
| 2965 int n = t.length (); | |
| 2966 if (t[n-1] == '\n') | |
| 2967 t.resize (n-1); | |
| 2968 gripe_matlab_incompatible (t + " used as operator"); | |
| 2969 } | |
| 2970 | |
|
7722
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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7720
diff
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|
2971 static void |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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7720
diff
changeset
|
2972 display_token (int tok) |
|
c3bb0b7a4261
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diff
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|
2973 { |
|
c3bb0b7a4261
lex.l: allow tokens to be displayed when parsed
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diff
changeset
|
2974 switch (tok) |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2975 { |
|
c3bb0b7a4261
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7720
diff
changeset
|
2976 case '=': std::cerr << "'='\n"; break; |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2977 case ':': std::cerr << "':'\n"; break; |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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changeset
|
2978 case '-': std::cerr << "'-'\n"; break; |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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changeset
|
2979 case '+': std::cerr << "'+'\n"; break; |
|
c3bb0b7a4261
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John W. Eaton <jwe@octave.org>
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|
2980 case '*': std::cerr << "'*'\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2981 case '/': std::cerr << "'/'\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2982 case ADD_EQ: std::cerr << "ADD_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2983 case SUB_EQ: std::cerr << "SUB_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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|
2984 case MUL_EQ: std::cerr << "MUL_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2985 case DIV_EQ: std::cerr << "DIV_EQ\n"; break; |
|
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changeset
|
2986 case LEFTDIV_EQ: std::cerr << "LEFTDIV_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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changeset
|
2987 case POW_EQ: std::cerr << "POW_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
2988 case EMUL_EQ: std::cerr << "EMUL_EQ\n"; break; |
|
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John W. Eaton <jwe@octave.org>
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|
2989 case EDIV_EQ: std::cerr << "EDIV_EQ\n"; break; |
|
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|
2990 case ELEFTDIV_EQ: std::cerr << "ELEFTDIV_EQ\n"; break; |
|
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|
2991 case EPOW_EQ: std::cerr << "EPOW_EQ\n"; break; |
|
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|
2992 case AND_EQ: std::cerr << "AND_EQ\n"; break; |
|
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|
2993 case OR_EQ: std::cerr << "OR_EQ\n"; break; |
|
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2994 case LSHIFT_EQ: std::cerr << "LSHIFT_EQ\n"; break; |
|
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|
2995 case RSHIFT_EQ: std::cerr << "RSHIFT_EQ\n"; break; |
|
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|
2996 case LSHIFT: std::cerr << "LSHIFT\n"; break; |
|
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|
2997 case RSHIFT: std::cerr << "RSHIFT\n"; break; |
|
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2998 case EXPR_AND_AND: std::cerr << "EXPR_AND_AND\n"; break; |
|
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|
2999 case EXPR_OR_OR: std::cerr << "EXPR_OR_OR\n"; break; |
|
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|
3000 case EXPR_AND: std::cerr << "EXPR_AND\n"; break; |
|
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|
3001 case EXPR_OR: std::cerr << "EXPR_OR\n"; break; |
|
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3002 case EXPR_NOT: std::cerr << "EXPR_NOT\n"; break; |
|
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3003 case EXPR_LT: std::cerr << "EXPR_LT\n"; break; |
|
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|
3004 case EXPR_LE: std::cerr << "EXPR_LE\n"; break; |
|
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|
3005 case EXPR_EQ: std::cerr << "EXPR_EQ\n"; break; |
|
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|
3006 case EXPR_NE: std::cerr << "EXPR_NE\n"; break; |
|
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|
3007 case EXPR_GE: std::cerr << "EXPR_GE\n"; break; |
|
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|
3008 case EXPR_GT: std::cerr << "EXPR_GT\n"; break; |
|
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|
3009 case LEFTDIV: std::cerr << "LEFTDIV\n"; break; |
|
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|
3010 case EMUL: std::cerr << "EMUL\n"; break; |
|
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|
3011 case EDIV: std::cerr << "EDIV\n"; break; |
|
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|
3012 case ELEFTDIV: std::cerr << "ELEFTDIV\n"; break; |
|
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|
3013 case EPLUS: std::cerr << "EPLUS\n"; break; |
|
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3014 case EMINUS: std::cerr << "EMINUS\n"; break; |
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3015 case QUOTE: std::cerr << "QUOTE\n"; break; |
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3016 case TRANSPOSE: std::cerr << "TRANSPOSE\n"; break; |
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3017 case PLUS_PLUS: std::cerr << "PLUS_PLUS\n"; break; |
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3018 case MINUS_MINUS: std::cerr << "MINUS_MINUS\n"; break; |
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3019 case POW: std::cerr << "POW\n"; break; |
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3020 case EPOW: std::cerr << "EPOW\n"; break; |
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3021 case NUM: std::cerr << "NUM\n"; break; |
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3022 case IMAG_NUM: std::cerr << "IMAG_NUM\n"; break; |
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3023 case STRUCT_ELT: std::cerr << "STRUCT_ELT\n"; break; |
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3024 case NAME: std::cerr << "NAME\n"; break; |
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3025 case END: std::cerr << "END\n"; break; |
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3026 case DQ_STRING: std::cerr << "DQ_STRING\n"; break; |
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3027 case SQ_STRING: std::cerr << "SQ_STRING\n"; break; |
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3028 case FOR: std::cerr << "FOR\n"; break; |
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3029 case WHILE: std::cerr << "WHILE\n"; break; |
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3030 case DO: std::cerr << "DO\n"; break; |
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3031 case UNTIL: std::cerr << "UNTIL\n"; break; |
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3032 case IF: std::cerr << "IF\n"; break; |
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3033 case ELSEIF: std::cerr << "ELSEIF\n"; break; |
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3034 case ELSE: std::cerr << "ELSE\n"; break; |
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3035 case SWITCH: std::cerr << "SWITCH\n"; break; |
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3036 case CASE: std::cerr << "CASE\n"; break; |
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3037 case OTHERWISE: std::cerr << "OTHERWISE\n"; break; |
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3038 case BREAK: std::cerr << "BREAK\n"; break; |
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3039 case CONTINUE: std::cerr << "CONTINUE\n"; break; |
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3040 case FUNC_RET: std::cerr << "FUNC_RET\n"; break; |
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3041 case UNWIND: std::cerr << "UNWIND\n"; break; |
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3042 case CLEANUP: std::cerr << "CLEANUP\n"; break; |
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3043 case TRY: std::cerr << "TRY\n"; break; |
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3044 case CATCH: std::cerr << "CATCH\n"; break; |
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3045 case GLOBAL: std::cerr << "GLOBAL\n"; break; |
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3046 case STATIC: std::cerr << "STATIC\n"; break; |
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3047 case FCN_HANDLE: std::cerr << "FCN_HANDLE\n"; break; |
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3048 case END_OF_INPUT: std::cerr << "END_OF_INPUT\n\n"; break; |
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3049 case LEXICAL_ERROR: std::cerr << "LEXICAL_ERROR\n\n"; break; |
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3050 case FCN: std::cerr << "FCN\n"; break; |
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3051 case CLOSE_BRACE: std::cerr << "CLOSE_BRACE\n"; break; |
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3052 case '\n': std::cerr << "\\n\n"; break; |
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3053 case '\r': std::cerr << "\\r\n"; break; |
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3054 case '\t': std::cerr << "TAB\n"; break; |
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3055 default: |
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3056 { |
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3057 if (tok < 256) |
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3058 std::cerr << static_cast<char> (tok) << "\n"; |
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3059 else |
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3060 std::cerr << "UNKNOWN(" << tok << ")\n"; |
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3061 } |
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3062 break; |
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3063 } |
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3064 } |
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3065 |
| 8535 | 3066 static void |
| 3067 display_state (void) | |
| 3068 { | |
| 3069 std::cerr << "S: "; | |
| 3070 | |
| 3071 switch (YY_START) | |
| 3072 { | |
| 3073 case INITIAL: | |
| 3074 std::cerr << "INITIAL" << std::endl; | |
| 3075 break; | |
| 3076 | |
| 3077 case COMMAND_START: | |
| 3078 std::cerr << "COMMAND_START" << std::endl; | |
| 3079 break; | |
| 3080 | |
| 3081 case MATRIX_START: | |
| 3082 std::cerr << "MATRIX_START" << std::endl; | |
| 3083 break; | |
| 3084 | |
| 3085 case SCRIPT_FILE_BEGIN: | |
| 3086 std::cerr << "SCRIPT_FILE_BEGIN" << std::endl; | |
| 3087 break; | |
| 3088 | |
| 3089 case NESTED_FUNCTION_END: | |
| 3090 std::cerr << "NESTED_FUNCTION_END" << std::endl; | |
| 3091 break; | |
| 3092 | |
| 3093 case NESTED_FUNCTION_BEGIN: | |
| 3094 std::cerr << "NESTED_FUNCTION_BEGIN" << std::endl; | |
| 3095 break; | |
| 3096 | |
| 3097 default: | |
| 3098 std::cerr << "UNKNOWN START STATE!" << std::endl; | |
| 3099 break; | |
| 3100 } | |
| 3101 } | |
| 3102 | |
| 3103 static void | |
| 3104 lexer_debug (const char *pattern, const char *text) | |
| 3105 { | |
| 3106 std::cerr << std::endl; | |
| 3107 | |
| 3108 display_state (); | |
| 3109 | |
| 3110 std::cerr << "P: " << pattern << std::endl; | |
| 3111 std::cerr << "T: " << text << std::endl; | |
| 3112 } | |
| 3113 | |
|
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3114 DEFUN (__display_tokens__, args, nargout, |
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3115 "-*- texinfo -*-\n\ |
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3116 @deftypefn {Built-in Function} {} __display_tokens__\n\ |
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3117 Query or set the internal variable that determines whether Octave's\n\ |
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3118 lexer displays tokens as they are read.\n\ |
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3119 @end deftypefn") |
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3120 { |
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3121 return SET_INTERNAL_VARIABLE (display_tokens); |
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3122 } |
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3123 |
| 4910 | 3124 DEFUN (__token_count__, , , |
| 3125 "-*- texinfo -*-\n\ | |
| 3126 @deftypefn {Built-in Function} {} __token_count__\n\ | |
| 3127 Number of language tokens processed since Octave startup.\n\ | |
| 3128 @end deftypefn") | |
| 3129 { | |
| 3130 return octave_value (Vtoken_count); | |
| 3131 } | |
| 3132 | |
| 8535 | 3133 DEFUN (__lexer_debug_flag__, args, nargout, |
| 3134 "Undocumented internal function.") | |
| 3135 { | |
| 3136 octave_value retval; | |
| 3137 | |
| 3138 retval = set_internal_variable (lexer_debug_flag, args, nargout, | |
| 3139 "__lexer_debug_flag__"); | |
| 3140 | |
| 3141 return retval; | |
| 3142 } | |
| 3143 | |
| 1994 | 3144 /* |
| 3145 ;;; Local Variables: *** | |
| 3146 ;;; mode: C++ *** | |
| 3147 ;;; End: *** | |
| 3148 */ |