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annotate libinterp/parse-tree/pt-fcn-handle.cc @ 28426:9a3deb17b4ea stable

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use shared_ptr for stack frames in call stack and for accesss and static links * call-stack.h, call-stack.cc: Use std::shared_ptr<stack_frame> instead of bare pointer for elements of call stack. Change all uses. * stack-frame.h, stack-frame.cc (stack_frame::static_link, stack_frame::access_link): Use std::shared_ptr<stack_frame> instead of bare pointer. Change all uses. (stack_frame::workspace): New function. * ov-fcn-handle.h, ov-fcn-handle.cc (octave_fcn_handle::m_closure_frames): Now a std::shared_ptr<stack_frame> object instead of a list of copied stack frames. Change all uses. (octave_fcn_handle::push_closure_context): Simply store std::shared_ptr to current stack frame. (octave_fcn_handle::workspace): Call stack_frame::workspace to get workspace info when we have closure frames.
author John W. Eaton <jwe@octave.org>
date Sat, 25 Apr 2020 13:17:11 -0400
parents 262cdfc6faf9
children 5bfa8e018704
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2003-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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30 #include <ostream>
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31
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32 #include "interpreter-private.h"
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33 #include "pt-anon-scopes.h"
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34 #include "pt-fcn-handle.h"
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35
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36 namespace octave
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37 {
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38 void
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39 tree_fcn_handle::print (std::ostream& os, bool pr_as_read_syntax,
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40 bool pr_orig_text)
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41 {
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42 print_raw (os, pr_as_read_syntax, pr_orig_text);
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43 }
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44
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45 void
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46 tree_fcn_handle::print_raw (std::ostream& os, bool pr_as_read_syntax,
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47 bool pr_orig_text)
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48 {
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49 os << ((pr_as_read_syntax || pr_orig_text) ? "@" : "") << m_name;
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50 }
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51
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52 tree_expression *
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53 tree_fcn_handle::dup (symbol_scope&) const
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54 {
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55 tree_fcn_handle *new_fh = new tree_fcn_handle (m_name, line (), column ());
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56
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57 new_fh->copy_base (*this);
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58
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59 return new_fh;
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60 }
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61
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62 octave_value
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63 tree_fcn_handle::evaluate (tree_evaluator& tw, int)
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64 {
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65 return make_fcn_handle (tw.get_interpreter (), m_name);
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66 }
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67
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68 tree_anon_fcn_handle::~tree_anon_fcn_handle (void)
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69 {
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70 delete m_parameter_list;
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71 delete m_expression;
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72 }
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73
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74 tree_expression *
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75 tree_anon_fcn_handle::dup (symbol_scope&) const
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76 {
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77 tree_parameter_list *param_list = parameter_list ();
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78 tree_expression *expr = expression ();
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79
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80 symbol_scope af_scope = m_scope;
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81 symbol_scope af_parent_scope = m_parent_scope;
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82
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83 symbol_scope new_scope;
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84
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85 if (af_scope)
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86 new_scope = af_scope.dup ();
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87
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88 // FIXME: if new scope is nullptr, then we are in big trouble here...
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89
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90 tree_anon_fcn_handle *new_afh = new
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91 tree_anon_fcn_handle (param_list ? param_list->dup (new_scope) : nullptr,
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92 expr ? expr->dup (new_scope) : nullptr,
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93 new_scope, af_parent_scope, line (), column ());
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94
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95 new_afh->copy_base (*this);
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96
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97 return new_afh;
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98 }
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99
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100 octave_value
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101 tree_anon_fcn_handle::evaluate (tree_evaluator& tw, int)
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102 {
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103 // FIXME: should CMD_LIST be limited to a single expression?
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104 // I think that is what Matlab does.
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105
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106 symbol_scope new_scope;
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107 if (m_scope)
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108 new_scope = m_scope.dup ();
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109
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110 tree_parameter_list *param_list_dup
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111 = m_parameter_list ? m_parameter_list->dup (new_scope) : nullptr;
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112
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113 tree_parameter_list *ret_list = nullptr;
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114
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115 tree_statement_list *stmt_list = nullptr;
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116
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117 symbol_scope parent_scope = tw.get_current_scope ();
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118
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119 new_scope.set_parent (parent_scope);
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120 new_scope.set_primary_parent (parent_scope);
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121
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122 if (m_expression)
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123 {
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124 tree_expression *expr_dup = m_expression->dup (new_scope);
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125 tree_statement *stmt = new tree_statement (expr_dup, nullptr);
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126 stmt_list = new tree_statement_list (stmt);
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127 }
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128
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129 tree_anon_scopes anon_fcn_ctx (*this);
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130
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131 std::set<std::string> free_vars = anon_fcn_ctx.free_variables ();
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132
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133 octave_user_function::local_vars_map local_var_init_vals;
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134
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135 call_stack& cs = tw.get_call_stack ();
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136
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137 std::shared_ptr<stack_frame> frame = cs.get_current_stack_frame ();
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138
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139 for (auto& name : free_vars)
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140 {
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141 octave_value val = frame->varval (name);
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142
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143 if (val.is_defined ())
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144 local_var_init_vals[name] = val;
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145 }
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146
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147 octave_user_function *af
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148 = new octave_user_function (new_scope, param_list_dup, ret_list,
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149 stmt_list, local_var_init_vals);
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150
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151 octave_function *curr_fcn = cs.current_function ();
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152
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153 if (curr_fcn)
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154 {
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155 // FIXME: maybe it would be better to just stash curr_fcn
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156 // instead of individual bits of info about it?
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157
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158 af->stash_parent_fcn_name (curr_fcn->name ());
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159 af->stash_dir_name (curr_fcn->dir_name ());
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160
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161 new_scope.cache_fcn_file_name (curr_fcn->fcn_file_name ());
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162 new_scope.cache_dir_name (curr_fcn->dir_name ());
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163
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164 // The following is needed so that class method dispatch works
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165 // properly for anonymous functions that wrap class methods.
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166
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167 if (curr_fcn->is_class_method () || curr_fcn->is_class_constructor ())
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168 af->stash_dispatch_class (curr_fcn->dispatch_class ());
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169
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170 af->stash_fcn_file_name (curr_fcn->fcn_file_name ());
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171 }
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172
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173 af->mark_as_anonymous_function ();
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174
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175 octave_value ov_fcn (af);
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176
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177 // octave_value fh (octave_fcn_binder::maybe_binder (ov_fcn, m_interpreter));
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178
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179 return octave_value (new octave_fcn_handle
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180 (ov_fcn, octave_fcn_handle::anonymous));
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181 }
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182 }
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183
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184 /*
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185 %!function r = __f2 (f, x)
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186 %! r = f (x);
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187 %!endfunction
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188 %!function f = __f1 (k)
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189 %! f = @(x) __f2 (@(y) y-k, x);
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190 %!endfunction
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191
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192 %!assert ((__f1 (3)) (10) == 7)
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193
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194 %!test
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195 %! g = @(t) feval (@(x) t*x, 2);
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196 %! assert (g(0.5) == 1);
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197
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198 %!test
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199 %! h = @(x) sin (x);
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200 %! g = @(f, x) h (x);
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201 %! f = @() g (@(x) h, pi);
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202 %! assert (f () == sin (pi));
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203
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204 The next two tests are intended to test parsing of a character string
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205 vs. hermitian operator at the beginning of an anonymous function
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206 expression. The use of ' for the character string and the spacing is
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207 intentional, so don't change it.
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208
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209 %!test
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210 %! f = @() 'foo';
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211 %! assert (f (), 'foo');
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212
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213 %!test
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214 %! f = @()'foo';
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215 %! assert (f (), 'foo');
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216 */