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annotate libinterp/parse-tree/pt-pr-code.h @ 26686:581d01526b34

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eliminate unnecessary tree_funcall class The tree_funcall class was only used to handled generated calls to internal functions used by classdef superclass reference and metaclass query operations. This change replaces those function calls by something more direct. * pt-classdef.h, pt-classdef.cc (tree_superclass_ref, tree_metaclass_query): New classes. * pt-walk.h (tree_walker::visit_tree_funcall): Delete. Update all derived classes. (tree_walker::visit_superclass_ref, tree_walker::visit_metaclass_query): New virtual functions. * pt-pr-code.h, pt-pr-code.cc (tree_print_code::visit (tree_print_code::visit_superclass_ref, tree_print_code::visit_metaclass_query): Correctly print these parse tree elements. * oct-parse.yy (superclass_identifier, meta_identifier): Use new tree_superclass_ref tree_metaclass_query classes instead of tree_funcall to represent these language elements. * lex.ll (base_lexer::handle_superclass_identifier): Attempt to make intent of code clearer. Save line and column info in token. * pt-eval.h, pt-eval.cc (tree_evaluator::visit_funcall): Delete. (tree_evaluator::visit_superclass_ref, tree_evaluator::visit_metaclass_query): New functions. Handle superclass reference and metaclass query operations more directly. * ov-classdef.h, ov-classdef.cc (F__superclass_reference__, F__meta_class_query__): Delete. (class octave_classdef_superclass_ref): Work directly with method or object and class names as strings instead of octave_value objects. (octave_classdef::superclass_ref, octave_classdef::metaclass_query): New static functions. * token.h, token.cc: Attempt to use clearer names for superclass reference tokens. * pt-funcall.h, pt-funcall.cc: Delete. * libinterp/parse-tree/module.mk: Update. * pt-all.h: Update.
author John W. Eaton <jwe@octave.org>
date Thu, 07 Feb 2019 00:03:55 +0000
parents fff643eb3514
children 6388a240de87
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1 /*
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2
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3 Copyright (C) 1996-2019 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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21 */
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23 #if ! defined (octave_pt_pr_code_h)
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24 #define octave_pt_pr_code_h 1
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26 #include "octave-config.h"
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28 #include <stack>
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29 #include <string>
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31 #include "pt-walk.h"
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33 namespace octave
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34 {
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35 class comment_elt;
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36 class comment_list;
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37 class tree_decl_command;
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38 class tree_expression;
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40 // How to print the code that the parse trees represent.
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42 class tree_print_code : public tree_walker
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43 {
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44 public:
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46 tree_print_code (std::ostream& os_arg,
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47 const std::string& pfx = "",
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48 bool pr_orig_txt = true)
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49 : m_os (os_arg), m_prefix (pfx), m_nesting (),
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50 m_print_original_text (pr_orig_txt),
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51 m_curr_print_indent_level (0), m_beginning_of_line (true),
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52 m_suppress_newlines (0)
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53 {
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54 // For "none".
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55 m_nesting.push ('n');
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56 }
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58 // No copying!
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60 tree_print_code (const tree_print_code&) = delete;
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61
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62 tree_print_code& operator = (const tree_print_code&) = delete;
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64 ~tree_print_code (void) = default;
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66 void visit_anon_fcn_handle (tree_anon_fcn_handle&);
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68 void visit_argument_list (tree_argument_list&);
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69
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70 void visit_binary_expression (tree_binary_expression&);
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72 void visit_break_command (tree_break_command&);
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74 void visit_colon_expression (tree_colon_expression&);
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76 void visit_continue_command (tree_continue_command&);
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78 void visit_decl_command (tree_decl_command&);
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80 void visit_decl_init_list (tree_decl_init_list&);
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82 void visit_decl_elt (tree_decl_elt&);
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84 void visit_simple_for_command (tree_simple_for_command&);
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86 void visit_complex_for_command (tree_complex_for_command&);
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87
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88 void visit_octave_user_script (octave_user_script&);
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90 void visit_octave_user_function (octave_user_function&);
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92 void visit_octave_user_function_header (octave_user_function&);
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94 void visit_octave_user_function_trailer (octave_user_function&);
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96 void visit_function_def (tree_function_def&);
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98 void visit_identifier (tree_identifier&);
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100 void visit_if_clause (tree_if_clause&);
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102 void visit_if_command (tree_if_command&);
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104 void visit_if_command_list (tree_if_command_list&);
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106 void visit_index_expression (tree_index_expression&);
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108 void visit_matrix (tree_matrix&);
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110 void visit_cell (tree_cell&);
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112 void visit_multi_assignment (tree_multi_assignment&);
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114 void visit_no_op_command (tree_no_op_command&);
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116 void visit_constant (tree_constant&);
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117
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118 void visit_fcn_handle (tree_fcn_handle&);
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119
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120 void visit_parameter_list (tree_parameter_list&);
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121
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122 void visit_postfix_expression (tree_postfix_expression&);
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124 void visit_prefix_expression (tree_prefix_expression&);
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126 void visit_return_command (tree_return_command&);
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127
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128 void visit_return_list (tree_return_list&);
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129
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130 void visit_simple_assignment (tree_simple_assignment&);
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132 void visit_statement (tree_statement&);
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133
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134 void visit_statement_list (tree_statement_list&);
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135
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136 void visit_switch_case (tree_switch_case&);
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137
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138 void visit_switch_case_list (tree_switch_case_list&);
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139
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140 void visit_switch_command (tree_switch_command&);
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141
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142 void visit_try_catch_command (tree_try_catch_command&);
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143
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144 void visit_unwind_protect_command (tree_unwind_protect_command&);
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145
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146 void visit_while_command (tree_while_command&);
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147
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148 void visit_do_until_command (tree_do_until_command&);
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149
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150 void visit_superclass_ref (tree_superclass_ref&);
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151
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152 void visit_metaclass_query (tree_metaclass_query&);
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153
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154 void print_fcn_handle_body (tree_expression *);
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155
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156 private:
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157
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158 std::ostream& m_os;
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159
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160 std::string m_prefix;
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161
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162 std::stack<char> m_nesting;
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163
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164 bool m_print_original_text;
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165
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166 // Current indentation.
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167 int m_curr_print_indent_level;
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168
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169 // TRUE means we are at the beginning of a line.
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170 bool m_beginning_of_line;
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171
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172 // Nonzero means we are not printing newlines and indenting.
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173 int m_suppress_newlines;
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174
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175 void reset_indent_level (void) { m_curr_print_indent_level = 0; }
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176
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177 void increment_indent_level (void) { m_curr_print_indent_level += 2; }
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178
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179 void decrement_indent_level (void) { m_curr_print_indent_level -= 2; }
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180
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181 void newline (const char *alt_txt = ", ");
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182
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183 void indent (void);
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184
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185 void reset (void);
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186
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187 void print_parens (const tree_expression& expr, const char *txt);
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188
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189 void print_comment_list (comment_list *comment_list);
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190
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191 void print_comment_elt (const comment_elt& comment_elt);
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192
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193 void print_indented_comment (comment_list *comment_list);
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194
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195 // Must create with an output stream!
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196
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197 tree_print_code (void);
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198 };
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199 }
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200
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201 #endif