+
−/*
+
−
+
−Copyright (C) 2003-2015 John W. Eaton
+
−
+
−This file is part of Octave.
+
−
+
−Octave is free software; you can redistribute it and/or modify it
+
−under the terms of the GNU General Public License as published by the
+
−Free Software Foundation; either version 3 of the License, or (at your
+
−option) any later version.
+
−
+
−Octave is distributed in the hope that it will be useful, but WITHOUT
+
−ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+
−FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+
−for more details.
+
−
+
−You should have received a copy of the GNU General Public License
+
−along with Octave; see the file COPYING.  If not, see
+
−<http://www.gnu.org/licenses/>.
+
−
+
−*/
+
−
+
−#ifdef HAVE_CONFIG_H
+
−#include <config.h>
+
−#endif
+
−
+
−#include <iostream>
+
−
+
−#include "error.h"
+
−#include "ovl.h"
+
−#include "ov-fcn-handle.h"
+
−#include "pt-fcn-handle.h"
+
−#include "pager.h"
+
−#include "pt-const.h"
+
−#include "pt-walk.h"
+
−#include "variables.h"
+
−
+
−void
+
−tree_fcn_handle::print (std::ostream& os, bool pr_as_read_syntax,
+
−                        bool pr_orig_text)
+
−{
+
−  print_raw (os, pr_as_read_syntax, pr_orig_text);
+
−}
+
−
+
−void
+
−tree_fcn_handle::print_raw (std::ostream& os, bool pr_as_read_syntax,
+
−                            bool pr_orig_text)
+
−{
+
−  os << ((pr_as_read_syntax || pr_orig_text) ? "@" : "") << nm;
+
−}
+
−
+
−octave_value
+
−tree_fcn_handle::rvalue1 (int)
+
−{
+
−  return make_fcn_handle (nm);
+
−}
+
−
+
−octave_value_list
+
−tree_fcn_handle::rvalue (int nargout)
+
−{
+
−  octave_value_list retval;
+
−
+
−  if (nargout > 1)
+
−    error ("invalid number of output arguments for function handle expression");
+
−  else
+
−    retval = rvalue1 (nargout);
+
−
+
−  return retval;
+
−}
+
−
+
−tree_expression *
+
−tree_fcn_handle::dup (symbol_table::scope_id,
+
−                      symbol_table::context_id) const
+
−{
+
−  tree_fcn_handle *new_fh = new tree_fcn_handle (nm, line (), column ());
+
−
+
−  new_fh->copy_base (*this);
+
−
+
−  return new_fh;
+
−}
+
−
+
−void
+
−tree_fcn_handle::accept (tree_walker& tw)
+
−{
+
−  tw.visit_fcn_handle (*this);
+
−}
+
−
+
−octave_value
+
−tree_anon_fcn_handle::rvalue1 (int)
+
−{
+
−  // FIXME: should CMD_LIST be limited to a single expression?
+
−  // I think that is what Matlab does.
+
−
+
−  tree_parameter_list *param_list = parameter_list ();
+
−  tree_parameter_list *ret_list = return_list ();
+
−  tree_statement_list *cmd_list = body ();
+
−  symbol_table::scope_id this_scope = scope ();
+
−
+
−  symbol_table::scope_id new_scope = symbol_table::dup_scope (this_scope);
+
−
+
−  if (new_scope > 0)
+
−    symbol_table::inherit (new_scope, symbol_table::current_scope (),
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−                           symbol_table::current_context ());
+
−
+
−  octave_user_function *uf
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−    = new octave_user_function (new_scope,
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−                                param_list ? param_list->dup (new_scope, 0) : 0,
+
−                                ret_list ? ret_list->dup (new_scope, 0) : 0,
+
−                                cmd_list ? cmd_list->dup (new_scope, 0) : 0);
+
−
+
−  octave_function *curr_fcn = octave_call_stack::current ();
+
−
+
−  if (curr_fcn)
+
−    {
+
−      // FIXME: maybe it would be better to just stash curr_fcn
+
−      // instead of individual bits of info about it?
+
−
+
−      uf->stash_parent_fcn_name (curr_fcn->name ());
+
−      uf->stash_dir_name (curr_fcn->dir_name ());
+
−
+
−      symbol_table::scope_id parent_scope = curr_fcn->parent_fcn_scope ();
+
−
+
−      if (parent_scope < 0)
+
−        parent_scope = curr_fcn->scope ();
+
−
+
−      uf->stash_parent_fcn_scope (parent_scope);
+
−
+
−      if (curr_fcn->is_class_method () || curr_fcn->is_class_constructor ())
+
−        uf->stash_dispatch_class (curr_fcn->dispatch_class ());
+
−    }
+
−
+
−  uf->mark_as_anonymous_function ();
+
−  uf->stash_fcn_file_name (file_name);
+
−  uf->stash_fcn_location (line (), column ());
+
−
+
−  octave_value ov_fcn (uf);
+
−
+
−  octave_value fh (octave_fcn_binder::maybe_binder (ov_fcn));
+
−
+
−  return fh;
+
−}
+
−
+
−/*
+
−%!function r = __f2 (f, x)
+
−%!  r = f (x);
+
−%!endfunction
+
−%!function f = __f1 (k)
+
−%!  f = @(x) __f2 (@(y) y-k, x);
+
−%!endfunction
+
−
+
−%!assert ((__f1 (3)) (10) == 7)
+
−
+
−%!test
+
−%! g = @(t) feval (@(x) t*x, 2);
+
−%! assert (g(0.5) == 1);
+
−
+
−%!test
+
−%! h = @(x) sin (x);
+
−%! g = @(f, x) h (x);
+
−%! f = @() g (@(x) h, pi);
+
−%! assert (f () == sin (pi));
+
−
+
−The next two tests are intended to test parsing of a character string
+
−vs. hermitian operator at the beginning of an anonymous function
+
−expression.  The use of ' for the character string and the spacing is
+
−intentional, so don't change it.
+
−
+
−%!test
+
−%! f = @() 'foo';
+
−%! assert (f (), 'foo');
+
−
+
−%!test
+
−%! f = @()'foo';
+
−%! assert (f (), 'foo');
+
−*/
+
−
+
−octave_value_list
+
−tree_anon_fcn_handle::rvalue (int nargout)
+
−{
+
−  octave_value_list retval;
+
−
+
−  if (nargout > 1)
+
−    error ("invalid number of output arguments for anonymous function handle expression");
+
−  else
+
−    retval = rvalue1 (nargout);
+
−
+
−  return retval;
+
−}
+
−
+
−tree_expression *
+
−tree_anon_fcn_handle::dup (symbol_table::scope_id,
+
−                           symbol_table::context_id) const
+
−{
+
−  tree_parameter_list *param_list = parameter_list ();
+
−  tree_parameter_list *ret_list = return_list ();
+
−  tree_statement_list *cmd_list = body ();
+
−  symbol_table::scope_id this_scope = scope ();
+
−
+
−  symbol_table::scope_id new_scope = symbol_table::dup_scope (this_scope);
+
−
+
−  if (new_scope > 0)
+
−    symbol_table::inherit (new_scope, symbol_table::current_scope (),
+
−                           symbol_table::current_context ());
+
−
+
−  tree_anon_fcn_handle *new_afh = new
+
−    tree_anon_fcn_handle (param_list ? param_list->dup (new_scope, 0) : 0,
+
−                          ret_list ? ret_list->dup (new_scope, 0) : 0,
+
−                          cmd_list ? cmd_list->dup (new_scope, 0) : 0,
+
−                          new_scope, line (), column ());
+
−
+
−  new_afh->copy_base (*this);
+
−
+
−  return new_afh;
+
−}
+
−
+
−void
+
−tree_anon_fcn_handle::accept (tree_walker& tw)
+
−{
+
−  tw.visit_anon_fcn_handle (*this);
+
−}