Mercurial > octave
annotate libinterp/parse-tree/pt-exp.h @ 24362:3fc24b792a24
avoid including symtab.h, symscope.h, or symrec.h unnecessarily
* main-window.cc, workspace-view.cc, call-stack.cc, call-stack.h,
defun-int.h, input.cc, load-save.h, symscope.h, symtab.h, variables.h,
ov-fcn-inline.h, ov-fcn.h, ov-usr-fcn.cc, ov-usr-fcn.h, lex.h,
oct-lvalue.h, parse.h, pt-arg-list.h, pt-array-list.h, pt-assign.h,
pt-binop.h, pt-cbinop.h, pt-cell.h, pt-cmd.h, pt-colon.h, pt-const.h,
pt-decl.h, pt-eval.h, pt-except.h, pt-exp.h, pt-fcn-handle.h,
pt-idx.h, pt-jit.h, pt-jump.h, pt-loop.h, pt-mat.h, pt-misc.h,
pt-select.h, pt-stmt.h, pt-unop.h, token.cc, token.h:
Where possible, use forward declarations for symbol_table,
symbol_scope, and symbol_record. Don't include symtab.h, symscope.h,
or symrec.h unless needed. Use symbol_record::context_id instead of
symbol_table::context_id or symbol_scope::context_id. Delete typedefs
for symbol_table::context_id and symbol_scope::context_id.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 05 Dec 2017 17:09:24 -0500 |
parents | cc3b3ceb155c |
children | 194eb4bd202b |
rev | line source |
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1739 | 1 /* |
2 | |
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3 Copyright (C) 1996-2017 John W. Eaton |
1739 | 4 |
5 This file is part of Octave. | |
6 | |
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. |
1739 | 11 |
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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. |
1739 | 16 |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1739 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_pt_exp_h) |
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24 #define octave_pt_exp_h 1 |
1739 | 25 |
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26 #include "octave-config.h" |
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27 |
2980 | 28 #include <string> |
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29 #include <list> |
2124 | 30 |
2879 | 31 class octave_value; |
32 | |
2988 | 33 #include "pt.h" |
2124 | 34 |
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35 namespace octave |
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36 { |
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37 class symbol_scope; |
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38 class octave_lvalue; |
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39 class tree_evaluator; |
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40 |
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41 // A base class for expressions. |
1739 | 42 |
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43 class tree_expression : public tree |
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44 { |
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45 public: |
2388 | 46 |
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47 tree_expression (int l = -1, int c = -1) |
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48 : tree (l, c), num_parens (0), postfix_index_type ('\0'), |
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49 for_cmd_expr (false), print_flag (false) { } |
2388 | 50 |
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51 // No copying! |
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53 tree_expression (const tree_expression&) = delete; |
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55 tree_expression& operator = (const tree_expression&) = delete; |
5861 | 56 |
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57 virtual ~tree_expression (void) = default; |
2388 | 58 |
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59 virtual bool has_magic_end (void) const = 0; |
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60 |
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61 virtual tree_expression * dup (symbol_scope& scope) const = 0; |
2388 | 62 |
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63 virtual bool is_constant (void) const { return false; } |
1739 | 64 |
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65 virtual bool is_matrix (void) const { return false; } |
1739 | 66 |
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67 virtual bool iscell (void) const { return false; } |
1739 | 68 |
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69 virtual bool is_identifier (void) const { return false; } |
1739 | 70 |
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71 virtual bool is_index_expression (void) const { return false; } |
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72 |
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73 virtual bool is_assignment_expression (void) const { return false; } |
4023 | 74 |
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75 virtual bool is_prefix_expression (void) const { return false; } |
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77 virtual bool is_unary_expression (void) const { return false; } |
1739 | 78 |
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79 virtual bool is_binary_expression (void) const { return false; } |
1739 | 80 |
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81 virtual bool is_boolean_expression (void) const { return false; } |
2124 | 82 |
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83 virtual bool lvalue_ok (void) const { return false; } |
2879 | 84 |
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85 virtual bool rvalue_ok (void) const { return false; } |
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86 |
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87 virtual octave_lvalue lvalue (tree_evaluator *); |
2124 | 88 |
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89 int paren_count (void) const { return num_parens; } |
1739 | 90 |
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91 bool is_postfix_indexed (void) const { return (postfix_index_type != '\0'); } |
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92 |
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93 char postfix_index (void) const { return postfix_index_type; } |
1739 | 94 |
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95 // Check if the result of the expression should be printed. |
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96 // Should normally be used in conjunction with |
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97 // tree_evaluator::statement_printing_enabled. |
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98 bool print_result (void) const { return print_flag; } |
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100 virtual std::string oper (void) const { return "<unknown>"; } |
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102 virtual std::string name (void) const { return "<unknown>"; } |
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104 virtual std::string original_text (void) const; |
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105 |
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106 virtual void mark_braindead_shortcircuit (void) { } |
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107 |
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108 void mark_as_for_cmd_expr (void) { for_cmd_expr = true; } |
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109 |
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110 bool is_for_cmd_expr (void) const { return for_cmd_expr; } |
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111 |
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112 tree_expression * mark_in_parens (void) |
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113 { |
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114 num_parens++; |
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115 return this; |
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116 } |
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118 tree_expression * set_postfix_index (char type) |
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119 { |
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120 postfix_index_type = type; |
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121 return this; |
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122 } |
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124 tree_expression * set_print_flag (bool print) |
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125 { |
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126 print_flag = print; |
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127 return this; |
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128 } |
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130 virtual void copy_base (const tree_expression& e) |
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131 { |
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132 num_parens = e.num_parens; |
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133 postfix_index_type = e.postfix_index_type; |
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134 print_flag = e.print_flag; |
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135 } |
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137 protected: |
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139 // A count of the number of times this expression appears directly |
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140 // inside a set of parentheses. |
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141 // |
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142 // (((e1)) + e2) ==> 2 for expression e1 |
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143 // ==> 1 for expression ((e1)) + e2 |
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144 // ==> 0 for expression e2 |
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145 int num_parens; |
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147 // The first index type associated with this expression. This field |
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148 // is 0 (character '\0') if the expression has no associated index. |
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149 // See the code in tree_identifier::rvalue for the rationale. |
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150 char postfix_index_type; |
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152 // TRUE if this expression is the EXPR in for loop: |
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153 // FOR i = EXPR ... END |
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154 bool for_cmd_expr; |
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155 |
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156 // Print result of rvalue for this expression? |
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157 bool print_flag; |
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158 }; |
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159 } |
2988 | 160 |
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161 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) |
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163 OCTAVE_DEPRECATED (4.4, "use 'octave::tree_expression' instead") |
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164 typedef octave::tree_expression tree_expression; |
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1739 | 166 #endif |
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167 |
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168 #endif |