Mercurial > hg > octave-avbm
annotate src/lex.h @ 7855:f317f14516cb
Add zoom stack facility in axes object.
| author | Michael Goffioul <michael.goffioul@gmail.com> |
|---|---|
| date | Tue, 04 Mar 2008 15:34:38 +0100 |
| parents | 74f5e0c7de9e |
| children | ff9e7873f8ea |
| rev | line source |
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| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, |
| 4 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 | |
| 383 | 24 #if !defined (octave_lex_h) |
| 25 #define octave_lex_h 1 | |
| 1 | 26 |
| 5775 | 27 // FIXME -- these input buffer things should be members of a |
| 1826 | 28 // parser input stream class. |
| 29 | |
| 1 | 30 typedef struct yy_buffer_state *YY_BUFFER_STATE; |
| 31 | |
| 32 // Associate a buffer with a new file to read. | |
| 33 extern YY_BUFFER_STATE create_buffer (FILE *f); | |
| 34 | |
| 35 // Report the current buffer. | |
| 36 extern YY_BUFFER_STATE current_buffer (void); | |
| 37 | |
| 38 // Connect to new buffer buffer. | |
| 39 extern void switch_to_buffer (YY_BUFFER_STATE buf); | |
| 40 | |
| 41 // Delete a buffer. | |
| 42 extern void delete_buffer (YY_BUFFER_STATE buf); | |
| 43 | |
| 44 // Restore a buffer (for unwind-prot). | |
| 45 extern void restore_input_buffer (void *buf); | |
| 46 | |
| 47 // Delete a buffer (for unwind-prot). | |
| 48 extern void delete_input_buffer (void *buf); | |
| 49 | |
| 4867 | 50 // Is the given string a keyword? |
| 51 extern bool is_keyword (const std::string& s); | |
| 52 | |
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53 extern void prep_lexer_for_script (void); |
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54 |
| 1826 | 55 // For communication between the lexer and parser. |
| 56 | |
| 3585 | 57 class |
| 58 lexical_feedback | |
| 1826 | 59 { |
| 60 public: | |
| 61 | |
| 62 lexical_feedback (void) { init (); } | |
| 63 | |
| 64 ~lexical_feedback (void) { } | |
| 65 | |
| 66 void init (void); | |
| 67 | |
| 3351 | 68 // Square bracket level count. |
| 69 int bracketflag; | |
| 1826 | 70 |
| 4613 | 71 // Curly brace level count. |
| 72 int braceflag; | |
| 73 | |
| 2877 | 74 // TRUE means we're in the middle of defining a loop. |
| 1826 | 75 int looping; |
| 76 | |
| 2877 | 77 // TRUE means that we should convert spaces to a comma inside a |
| 2857 | 78 // matrix definition. |
| 79 bool convert_spaces_to_comma; | |
| 80 | |
| 2877 | 81 // TRUE means we're in the middle of defining a function. |
| 2857 | 82 bool defining_func; |
| 83 | |
| 4930 | 84 // Nonzero means we are parsing a function handle. |
| 85 int looking_at_function_handle; | |
| 86 | |
| 2877 | 87 // TRUE means we're parsing the return list for a function. |
| 2857 | 88 bool looking_at_return_list; |
| 89 | |
| 2877 | 90 // TRUE means we're parsing the parameter list for a function. |
| 2857 | 91 bool looking_at_parameter_list; |
| 92 | |
|
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93 // TRUE means we are looking at the initializer expression for a |
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94 // parameter list element. |
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95 bool looking_at_initializer_expression; |
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96 |
| 3189 | 97 // TRUE means we're parsing a matrix or the left hand side of |
| 98 // multi-value assignment statement. | |
| 99 bool looking_at_matrix_or_assign_lhs; | |
| 100 | |
| 4237 | 101 // Nonzero means we're parsing an indexing operation for an object. |
| 102 int looking_at_object_index; | |
| 4234 | 103 |
| 2857 | 104 // GAG. Stupid kludge so that [[1,2][3,4]] will work. |
| 105 bool do_comma_insert; | |
| 106 | |
| 5102 | 107 // TRUE means we're doing a raw input command. |
| 108 bool doing_rawcommand; | |
| 109 | |
| 2877 | 110 // TRUE means we're looking at an indirect reference to a |
| 2857 | 111 // structure element. |
| 112 bool looking_at_indirect_ref; | |
| 113 | |
| 2877 | 114 // TRUE means that we've already seen the name of this function. |
| 115 // Should only matter if defining_func is also TRUE. | |
| 116 bool parsed_function_name; | |
| 117 | |
| 4240 | 118 // Are we parsing a nested function? |
| 119 // 1 ==> Yes. | |
| 120 // 0 ==> No. | |
| 121 // -1 ==> Yes, but it is the last one because we have seen EOF. | |
| 122 int parsing_nested_function; | |
| 4238 | 123 |
| 7336 | 124 // TRUE means we are parsing a class method. |
| 125 bool parsing_class_method; | |
| 126 | |
| 1826 | 127 // Return transpose or start a string? |
| 2857 | 128 bool quote_is_transpose; |
| 1826 | 129 |
| 130 private: | |
| 131 | |
| 132 lexical_feedback (const lexical_feedback&); | |
| 133 | |
| 134 lexical_feedback& operator = (const lexical_feedback&); | |
| 135 }; | |
| 136 | |
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137 class |
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138 stream_reader |
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139 { |
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140 public: |
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141 virtual int getc (void) = 0; |
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142 virtual int ungetc (int c) = 0; |
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143 |
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144 protected: |
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145 stream_reader (void) { } |
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146 ~stream_reader (void) { } |
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147 |
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148 private: |
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149 |
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150 // No copying! |
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151 stream_reader (const stream_reader&); |
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152 stream_reader& operator = (const stream_reader&); |
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153 }; |
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154 |
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155 extern std::string |
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156 grab_comment_block (stream_reader& reader, bool at_bol, bool& eof); |
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157 |
| 3883 | 158 // TRUE means that we have encountered EOF on the input stream. |
| 159 extern bool parser_end_of_input; | |
| 160 | |
| 1826 | 161 // Flags that need to be shared between the lexer and parser. |
| 162 extern lexical_feedback lexer_flags; | |
| 440 | 163 |
| 1 | 164 #endif |
| 165 | |
| 166 /* | |
| 167 ;;; Local Variables: *** | |
| 168 ;;; mode: C++ *** | |
| 169 ;;; End: *** | |
| 170 */ |