Mercurial > octave
annotate libinterp/parse-tree/lex.h @ 22196:dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
* oct-parse.in.yy, parse.h: Move parser classes to octave namespace.
* lex.ll, lex.h: Move lexer classes to octave namespace.
* pt-eval.h, pt-eval.cc: Move evaluator class to octave namespace.
Don't define global current evaluator pointer here.
* debug.cc, error.cc, input.cc, input.h, ls-mat-ascii.cc, pt-jit.cc,
sighandlers.cc, utils.cc, variables.cc, ov-usr-fcn.cc, pt-assign.cc,
pt-exp.h, pt-id.cc: Update for namespaces.
* interpreter.cc, interpreter.h (current_evaluator): New global var.
(interpreter::m_evaluator): New data member.
(interpreter::~interpreter): Delete evaluator.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 12 Jul 2016 14:28:07 -0400 |
parents | 0b5fd19477fd |
children | 6ca3acf5fad8 |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2015 John W. Eaton |
1 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
1 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
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/>. | |
1 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_lex_h) |
383 | 24 #define octave_lex_h 1 |
1 | 25 |
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26 #include "octave-config.h" |
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27 |
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28 #include <deque> |
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29 #include <limits> |
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30 #include <list> |
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31 #include <set> |
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32 #include <stack> |
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33 |
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34 #include "comment-list.h" |
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35 #include "input.h" |
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36 #include "token.h" |
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37 |
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38 namespace octave |
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39 { |
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40 class interpreter; |
1826 | 41 |
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42 // Is the given string a keyword? |
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43 extern bool is_keyword (const std::string& s); |
1826 | 44 |
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45 // For communication between the lexer and parser. |
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46 |
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47 class |
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48 lexical_feedback |
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49 { |
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50 public: |
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51 |
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52 // Track symbol table information when parsing functions. |
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53 |
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54 class symbol_table_context |
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55 { |
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56 public: |
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57 |
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58 symbol_table_context (void) : frame_stack () { } |
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59 |
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60 void clear (void) |
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61 { |
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62 while (! frame_stack.empty ()) |
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63 frame_stack.pop (); |
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64 } |
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65 |
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66 bool empty (void) const { return frame_stack.empty (); } |
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67 |
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68 void pop (void) |
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69 { |
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70 if (empty ()) |
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71 panic_impossible (); |
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72 |
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73 frame_stack.pop (); |
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74 } |
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75 |
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76 void push (symbol_table::scope_id scope = symbol_table::current_scope ()) |
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77 { |
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78 frame_stack.push (scope); |
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79 } |
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80 |
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81 symbol_table::scope_id curr_scope (void) const |
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82 { |
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83 return empty () ? symbol_table::current_scope () : frame_stack.top (); |
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84 } |
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85 |
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86 private: |
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87 |
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88 std::stack<symbol_table::scope_id> frame_stack; |
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89 }; |
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90 |
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91 // Track nesting of square brackets, curly braces, and parentheses. |
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92 |
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93 class bbp_nesting_level |
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94 { |
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95 private: |
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96 |
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97 enum bracket_type |
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98 { |
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99 BRACKET = 1, |
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100 BRACE = 2, |
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101 PAREN = 3, |
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102 ANON_FCN_BODY = 4 |
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103 }; |
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104 |
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105 public: |
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106 |
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107 bbp_nesting_level (void) : context () { } |
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108 |
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109 bbp_nesting_level (const bbp_nesting_level& nl) : context (nl.context) { } |
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110 |
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111 bbp_nesting_level& operator = (const bbp_nesting_level& nl) |
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112 { |
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113 if (&nl != this) |
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114 context = nl.context; |
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115 |
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116 return *this; |
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117 } |
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118 |
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119 ~bbp_nesting_level (void) { } |
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120 |
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121 void reset (void) |
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122 { |
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123 while (! context.empty ()) |
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124 context.pop (); |
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125 } |
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126 |
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127 void bracket (void) { context.push (BRACKET); } |
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128 |
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129 bool is_bracket (void) |
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130 { |
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131 return ! context.empty () && context.top () == BRACKET; |
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132 } |
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134 void brace (void) { context.push (BRACE); } |
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135 |
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136 bool is_brace (void) |
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137 { |
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138 return ! context.empty () && context.top () == BRACE; |
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139 } |
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140 |
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141 void paren (void) { context.push (PAREN); } |
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142 |
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143 bool is_paren (void) |
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144 { |
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145 return ! context.empty () && context.top () == PAREN; |
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146 } |
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147 |
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148 void anon_fcn_body (void) { context.push (ANON_FCN_BODY); } |
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149 |
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150 bool is_anon_fcn_body (void) |
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151 { |
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152 return ! context.empty () && context.top () == ANON_FCN_BODY; |
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153 } |
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154 |
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155 bool is_bracket_or_brace (void) |
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156 { |
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157 return (! context.empty () |
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158 && (context.top () == BRACKET || context.top () == BRACE)); |
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159 } |
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160 |
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161 bool none (void) { return context.empty (); } |
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162 |
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163 void remove (void) |
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164 { |
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165 if (! context.empty ()) |
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166 context.pop (); |
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167 } |
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168 |
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169 void clear (void) |
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170 { |
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171 while (! context.empty ()) |
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172 context.pop (); |
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173 } |
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174 |
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175 private: |
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176 |
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177 std::stack<int> context; |
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178 }; |
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179 |
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180 class token_cache |
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181 { |
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182 public: |
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183 |
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184 // Store an "unlimited" number of tokens. |
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185 token_cache (size_t sz_arg = std::numeric_limits<size_t>::max ()) |
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186 : buffer (), sz (sz_arg) |
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187 { } |
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188 |
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189 void push (token *tok) |
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190 { |
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191 if (buffer.size () == sz) |
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192 pop (); |
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193 |
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194 buffer.push_front (tok); |
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195 } |
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196 |
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197 void pop (void) |
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198 { |
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199 if (! empty ()) |
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200 { |
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201 delete buffer.back (); |
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202 buffer.pop_back (); |
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203 } |
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204 } |
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205 |
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206 // Direct access. |
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207 token *at (size_t n) |
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208 { |
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209 return empty () ? 0 : buffer.at (n); |
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210 } |
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211 |
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212 const token *at (size_t n) const |
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213 { |
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214 return empty () ? 0 : buffer.at (n); |
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215 } |
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216 |
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217 // Most recently pushed. |
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218 token *front (void) |
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219 { |
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220 return empty () ? 0 : buffer.front (); |
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221 } |
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222 |
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223 const token *front (void) const |
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224 { |
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225 return empty () ? 0 : buffer.front (); |
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226 } |
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227 |
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228 token *back (void) |
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229 { |
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230 return empty () ? 0 : buffer.back (); |
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231 } |
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232 |
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233 const token *back (void) const |
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234 { |
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235 return empty () ? 0 : buffer.back (); |
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236 } |
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237 |
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238 // Number of elements currently in the buffer, max of sz. |
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239 size_t size (void) const { return buffer.size (); } |
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240 |
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241 bool empty (void) const { return buffer.empty (); } |
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242 |
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243 void clear (void) |
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244 { |
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245 while (! empty ()) |
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246 pop (); |
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247 } |
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248 |
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249 private: |
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250 |
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251 std::deque<token *> buffer; |
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252 |
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253 size_t sz; |
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254 |
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255 // No copying! |
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256 |
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257 token_cache (const token_cache&); |
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258 |
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259 token_cache& operator = (const token_cache&); |
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260 }; |
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261 |
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262 lexical_feedback (void) |
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263 : end_of_input (false), at_beginning_of_statement (true), |
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264 looking_at_anon_fcn_args (false), looking_at_return_list (false), |
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265 looking_at_parameter_list (false), looking_at_decl_list (false), |
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266 looking_at_initializer_expression (false), |
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267 looking_at_matrix_or_assign_lhs (false), |
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268 looking_for_object_index (false), |
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269 looking_at_indirect_ref (false), parsing_class_method (false), |
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270 parsing_classdef (false), maybe_classdef_get_set_method (false), |
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271 parsing_classdef_get_method (false), |
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272 parsing_classdef_set_method (false), |
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273 quote_is_transpose (false), force_script (false), |
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274 reading_fcn_file (false), reading_script_file (false), |
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275 reading_classdef_file (false), |
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276 input_line_number (1), current_input_column (1), |
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277 bracketflag (0), braceflag (0), |
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278 looping (0), defining_func (0), looking_at_function_handle (0), |
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279 block_comment_nesting_level (0), command_arg_paren_count (0), |
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280 token_count (0), current_input_line (), comment_text (), |
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281 help_text (), string_text (), string_line (0), string_column (0), |
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282 fcn_file_name (), fcn_file_full_name (), looking_at_object_index (), |
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283 parsed_function_name (), pending_local_variables (), |
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284 symtab_context (), nesting_level (), tokens () |
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285 { |
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286 init (); |
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287 } |
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288 |
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289 ~lexical_feedback (void); |
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290 |
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291 void init (void); |
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292 |
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293 void reset (void); |
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294 |
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295 int previous_token_value (void) const; |
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296 |
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297 bool previous_token_value_is (int tok_val) const; |
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298 |
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299 void mark_previous_token_trailing_space (void); |
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300 |
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301 bool space_follows_previous_token (void) const; |
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302 |
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303 bool previous_token_is_binop (void) const; |
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304 |
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305 bool previous_token_is_keyword (void) const; |
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306 |
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307 bool previous_token_may_be_command (void) const; |
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308 |
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309 void maybe_mark_previous_token_as_variable (void); |
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310 |
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311 void mark_as_variable (const std::string& nm); |
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312 void mark_as_variables (const std::list<std::string>& lst); |
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313 |
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314 // true means that we have encountered eof on the input stream. |
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315 bool end_of_input; |
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316 |
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317 // true means we are at the beginning of a statement, where a |
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318 // command name is possible. |
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319 bool at_beginning_of_statement; |
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320 |
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321 // true means we are parsing an anonymous function argument list. |
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322 bool looking_at_anon_fcn_args; |
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323 |
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324 // true means we're parsing the return list for a function. |
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325 bool looking_at_return_list; |
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326 |
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327 // true means we're parsing the parameter list for a function. |
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328 bool looking_at_parameter_list; |
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329 |
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330 // true means we're parsing a declaration list (global or |
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331 // persistent). |
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332 bool looking_at_decl_list; |
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333 |
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334 // true means we are looking at the initializer expression for a |
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335 // parameter list element. |
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336 bool looking_at_initializer_expression; |
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337 |
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338 // true means we're parsing a matrix or the left hand side of |
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339 // multi-value assignment statement. |
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340 bool looking_at_matrix_or_assign_lhs; |
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341 |
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342 // object index not possible until we've seen something. |
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343 bool looking_for_object_index; |
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344 |
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345 // true means we're looking at an indirect reference to a |
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346 // structure element. |
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347 bool looking_at_indirect_ref; |
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348 |
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349 // true means we are parsing a class method in function or classdef file. |
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350 bool parsing_class_method; |
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351 |
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352 // true means we are parsing a classdef file |
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353 bool parsing_classdef; |
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354 |
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355 // true means we are parsing a class method declaration line in a |
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356 // classdef file and can accept a property get or set method name. |
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357 // for example, "get.propertyname" is recognized as a function name. |
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358 bool maybe_classdef_get_set_method; |
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359 |
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360 // TRUE means we are parsing a classdef get.method. |
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361 bool parsing_classdef_get_method; |
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362 |
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363 // TRUE means we are parsing a classdef set.method. |
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364 bool parsing_classdef_set_method; |
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365 |
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366 // return transpose or start a string? |
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367 bool quote_is_transpose; |
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368 |
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369 // TRUE means treat the current file as a script even if the first |
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370 // token is "function" or "classdef". |
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371 bool force_script; |
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372 |
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373 // TRUE means we're parsing a function file. |
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374 bool reading_fcn_file; |
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375 |
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376 // TRUE means we're parsing a script file. |
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377 bool reading_script_file; |
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378 |
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379 // TRUE means we're parsing a classdef file. |
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380 bool reading_classdef_file; |
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381 |
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382 // the current input line number. |
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383 int input_line_number; |
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384 |
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385 // the column of the current token. |
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386 int current_input_column; |
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387 |
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388 // square bracket level count. |
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389 int bracketflag; |
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390 |
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391 // curly brace level count. |
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392 int braceflag; |
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393 |
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394 // true means we're in the middle of defining a loop. |
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395 int looping; |
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396 |
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397 // nonzero means we're in the middle of defining a function. |
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398 int defining_func; |
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399 |
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400 // nonzero means we are parsing a function handle. |
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401 int looking_at_function_handle; |
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402 |
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403 // nestng level for blcok comments. |
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404 int block_comment_nesting_level; |
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405 |
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406 // Parenthesis count for command argument parsing. |
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407 int command_arg_paren_count; |
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408 |
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409 // Count of tokens recognized by this lexer since initialized or |
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410 // since the last reset. |
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411 size_t token_count; |
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412 |
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413 // The current line of input. |
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414 std::string current_input_line; |
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415 |
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416 // The current comment text. |
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417 std::string comment_text; |
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418 |
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419 // The current help text. |
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420 std::string help_text; |
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421 |
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422 // The current character string text. |
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423 std::string string_text; |
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424 |
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425 // The position of the beginning of the current character string. |
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426 int string_line; |
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427 int string_column; |
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428 |
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429 // Simple name of function file we are reading. |
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430 std::string fcn_file_name; |
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431 |
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432 // Full name of file we are reading. |
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433 std::string fcn_file_full_name; |
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434 |
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435 // if the front of the list is true, the closest paren, brace, or |
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436 // bracket nesting is an index for an object. |
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437 std::list<bool> looking_at_object_index; |
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438 |
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439 // if the top of the stack is true, then we've already seen the name |
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440 // of the current function. should only matter if |
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441 // current_function_level > 0 |
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442 std::stack<bool> parsed_function_name; |
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443 |
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444 // set of identifiers that might be local variable names. |
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445 std::set<std::string> pending_local_variables; |
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446 |
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447 // Track current symbol table scope and context. |
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448 symbol_table_context symtab_context; |
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449 |
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450 // is the closest nesting level a square bracket, squiggly brace, |
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451 // a paren, or an anonymous function body? |
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452 bbp_nesting_level nesting_level; |
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453 |
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454 // Tokens generated by the lexer. |
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455 token_cache tokens; |
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456 |
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457 private: |
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458 |
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459 // No copying! |
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460 |
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461 lexical_feedback (const lexical_feedback&); |
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462 |
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463 lexical_feedback& operator = (const lexical_feedback&); |
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464 }; |
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465 |
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466 // base_lexer inherits from lexical_feedback because we will |
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467 // eventually have several different constructors and it is easier to |
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468 // intialize if everything is grouped in a parent class rather than |
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469 // listing all the members in the base_lexer class. |
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470 |
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471 class |
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472 base_lexer : public lexical_feedback |
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473 { |
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474 public: |
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475 |
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476 // Handle buffering of input for lexer. |
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477 |
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478 class input_buffer |
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479 { |
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480 public: |
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481 |
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482 input_buffer (void) |
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483 : buffer (), pos (0), chars_left (0), eof (false) |
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484 { } |
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485 |
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486 void fill (const std::string& input, bool eof_arg); |
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487 |
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488 // Copy at most max_size characters to buf. |
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489 int copy_chunk (char *buf, size_t max_size); |
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490 |
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491 bool empty (void) const { return chars_left == 0; } |
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492 |
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493 bool at_eof (void) const { return eof; } |
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494 |
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495 private: |
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496 |
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497 std::string buffer; |
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498 const char *pos; |
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499 size_t chars_left; |
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500 bool eof; |
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501 }; |
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502 |
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503 // Collect comment text. |
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504 |
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505 class |
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506 comment_buffer |
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507 { |
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508 public: |
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509 |
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510 comment_buffer (void) : comment_list (0) { } |
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511 |
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512 ~comment_buffer (void) { delete comment_list; } |
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513 |
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514 void append (const std::string& s, octave_comment_elt::comment_type t) |
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515 { |
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516 if (! comment_list) |
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517 comment_list = new octave_comment_list (); |
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518 |
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519 comment_list->append (s, t); |
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520 } |
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521 |
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522 // Caller is expected to delete the returned value. |
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523 |
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524 octave_comment_list *get_comment (void) |
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525 { |
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526 octave_comment_list *retval = comment_list; |
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527 |
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528 comment_list = 0; |
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529 |
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530 return retval; |
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531 } |
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532 |
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533 void reset (void) |
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534 { |
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535 delete comment_list; |
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536 |
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537 comment_list = 0; |
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538 } |
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539 |
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540 private: |
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541 |
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542 octave_comment_list *comment_list; |
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543 }; |
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544 |
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545 base_lexer (interpreter *interp_context = 0) |
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546 : lexical_feedback (), scanner (0), input_buf (), comment_buf (), |
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547 m_interp_context (interp_context) |
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548 { |
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549 init (); |
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550 } |
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551 |
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552 virtual ~base_lexer (void); |
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553 |
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554 void init (void); |
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555 |
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556 virtual bool is_push_lexer (void) const { return false; } |
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557 |
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558 virtual void reset (void); |
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559 |
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560 void prep_for_file (void); |
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561 |
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562 void begin_string (int state); |
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563 |
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564 virtual int fill_flex_buffer (char *buf, unsigned int max_size) = 0; |
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565 |
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566 bool at_end_of_buffer (void) const { return input_buf.empty (); } |
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567 |
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568 bool at_end_of_file (void) const { return input_buf.at_eof (); } |
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569 |
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570 int handle_end_of_input (void); |
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571 |
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572 char *flex_yytext (void); |
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573 |
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574 int flex_yyleng (void); |
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575 |
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576 int text_yyinput (void); |
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577 |
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578 void xunput (char c, char *buf); |
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579 |
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580 void xunput (char c); |
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581 |
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582 bool looking_at_space (void); |
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583 |
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584 bool inside_any_object_index (void); |
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585 |
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586 bool is_variable (const std::string& name, symbol_table::scope_id scope); |
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587 |
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588 int is_keyword_token (const std::string& s); |
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589 |
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590 bool fq_identifier_contains_keyword (const std::string& s); |
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591 |
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592 bool whitespace_is_significant (void); |
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593 |
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594 void handle_number (void); |
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595 |
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596 void handle_continuation (void); |
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597 |
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598 void finish_comment (octave_comment_elt::comment_type typ); |
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599 |
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600 octave_comment_list *get_comment (void) { return comment_buf.get_comment (); } |
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601 |
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602 int handle_close_bracket (int bracket_type); |
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603 |
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604 bool looks_like_command_arg (void); |
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605 |
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606 int handle_superclass_identifier (void); |
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607 |
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608 int handle_meta_identifier (void); |
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609 |
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610 int handle_fq_identifier (void); |
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611 |
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612 int handle_identifier (void); |
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613 |
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614 void maybe_warn_separator_insert (char sep); |
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615 |
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616 void warn_single_quote_string (void); |
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617 |
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618 void warn_language_extension (const std::string& msg); |
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619 |
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620 void maybe_warn_language_extension_comment (char c); |
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621 |
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622 void warn_language_extension_continuation (void); |
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623 |
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624 void warn_language_extension_operator (const std::string& op); |
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625 |
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626 void push_token (token *); |
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627 |
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628 token *current_token (void); |
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629 |
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630 void display_token (int tok); |
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631 |
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632 void fatal_error (const char *msg); |
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633 |
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634 void lexer_debug (const char *pattern); |
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635 |
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636 // Internal state of the flex-generated lexer. |
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637 void *scanner; |
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638 |
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639 // Object that reads and buffers input. |
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640 input_buffer input_buf; |
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641 |
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642 // Object that collects comment text. |
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643 comment_buffer comment_buf; |
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644 |
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645 // Interpreter that contains us, if any. |
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646 interpreter *m_interp_context; |
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647 |
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648 virtual void increment_promptflag (void) = 0; |
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649 |
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650 virtual void decrement_promptflag (void) = 0; |
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651 |
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652 virtual int promptflag (void) const = 0; |
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653 |
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654 virtual int promptflag (int) = 0; |
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655 |
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656 virtual std::string input_source (void) const { return "unknown"; } |
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657 |
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658 virtual bool input_from_terminal (void) const { return false; } |
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659 |
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660 virtual bool input_from_file (void) const { return false; } |
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661 |
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662 virtual bool input_from_eval_string (void) const { return false; } |
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663 |
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664 void push_start_state (int state); |
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665 |
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666 void pop_start_state (void); |
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667 |
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668 void clear_start_state (void); |
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669 |
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670 int start_state (void) const { return start_state_stack.top (); } |
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671 |
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672 void display_start_state (void) const; |
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673 |
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674 int handle_op (const char *pattern, int tok, bool bos = false); |
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675 |
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676 int handle_language_extension_op (const char *pattern, int tok, |
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677 bool bos = false); |
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678 |
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679 bool maybe_unput_comma_before_unary_op (int tok); |
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680 |
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681 int handle_unary_op (int tok, bool bos = false); |
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682 |
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683 int handle_language_extension_unary_op (int tok, bool bos = false); |
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684 |
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685 int handle_assign_op (const char *pattern, int tok); |
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686 |
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687 int handle_language_extension_assign_op (const char *pattern, int tok); |
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688 |
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689 int handle_op_internal (int tok, bool bos, bool compat); |
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690 |
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691 int handle_token (const std::string& name, int tok); |
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692 |
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693 int handle_token (int tok, token *tok_val = 0); |
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694 |
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695 int count_token (int tok); |
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696 |
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697 int count_token_internal (int tok); |
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698 |
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699 int show_token (int tok); |
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700 |
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701 void enable_fq_identifier (void); |
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702 |
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703 protected: |
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704 |
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705 std::stack<int> start_state_stack; |
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706 |
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707 // No copying! |
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708 |
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709 base_lexer (const base_lexer&); |
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710 |
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711 base_lexer& operator = (const base_lexer&); |
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712 }; |
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713 |
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714 class |
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715 lexer : public base_lexer |
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716 { |
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717 public: |
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718 |
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719 lexer (interpreter *interp_context = 0) |
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720 : base_lexer (interp_context), input_reader (this) |
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721 { } |
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722 |
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723 lexer (FILE *file, interpreter *interp_context = 0) |
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724 : base_lexer (interp_context), input_reader (file, this) |
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725 { } |
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726 |
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727 lexer (const std::string& eval_string, |
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728 interpreter *interp_context = 0) |
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729 : base_lexer (interp_context), input_reader (eval_string, this) |
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730 { } |
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731 |
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732 void reset (void) |
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733 { |
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734 input_reader.reset (); |
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735 |
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736 base_lexer::reset (); |
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737 } |
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738 |
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739 void increment_promptflag (void) { input_reader.increment_promptflag (); } |
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740 |
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741 void decrement_promptflag (void) { input_reader.decrement_promptflag (); } |
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742 |
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743 int promptflag (void) const { return input_reader.promptflag (); } |
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744 |
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745 int promptflag (int n) { return input_reader.promptflag (n); } |
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746 |
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747 std::string input_source (void) const |
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748 { |
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749 return input_reader.input_source (); |
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750 } |
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751 |
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752 bool input_from_terminal (void) const |
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753 { |
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754 return input_reader.input_from_terminal (); |
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755 } |
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756 |
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757 bool input_from_file (void) const |
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758 { |
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759 return input_reader.input_from_file (); |
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760 } |
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761 |
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762 bool input_from_eval_string (void) const |
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763 { |
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764 return input_reader.input_from_eval_string (); |
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765 } |
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766 |
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767 int fill_flex_buffer (char *buf, unsigned int max_size); |
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768 |
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769 octave_input_reader input_reader; |
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770 |
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771 protected: |
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772 |
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773 // No copying! |
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774 |
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775 lexer (const lexer&); |
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776 |
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777 lexer& operator = (const lexer&); |
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778 }; |
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779 |
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780 class |
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781 push_lexer : public base_lexer |
16195
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782 { |
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783 public: |
16113
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784 |
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785 push_lexer (interpreter *interp_context = 0) |
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786 : base_lexer (interp_context), pflag (1) |
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787 { |
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788 append_input ("", false); |
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789 } |
16253
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partial cleanup of continuation handling in lexer
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|
790 |
22196
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791 push_lexer (const std::string& input, |
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792 interpreter *interp_context = 0) |
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793 : base_lexer (interp_context), pflag (1) |
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794 { |
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795 append_input (input, false); |
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796 } |
16113
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797 |
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798 push_lexer (bool eof, interpreter *interp_context = 0) |
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799 : base_lexer (interp_context), pflag (1) |
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800 { |
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801 append_input ("", eof); |
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802 } |
16209
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|
803 |
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804 push_lexer (const std::string& input, bool eof, |
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805 interpreter *interp_context = 0) |
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806 : base_lexer (interp_context), pflag (1) |
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807 { |
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808 append_input (input, eof); |
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809 } |
16224
4a848eb52de2
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|
810 |
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811 bool is_push_lexer (void) const { return true; } |
16263
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|
812 |
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813 void reset (void) |
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814 { |
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815 promptflag (1); |
16229
7b7b1e4968e8
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816 |
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817 base_lexer::reset (); |
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818 } |
16293
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16292
diff
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|
819 |
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820 void append_input (const std::string& input, bool eof) |
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821 { |
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822 input_buf.fill (input, eof); |
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823 } |
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824 |
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825 void increment_promptflag (void) { pflag++; } |
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826 |
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827 void decrement_promptflag (void) { pflag--; } |
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828 |
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829 int promptflag (void) const { return pflag; } |
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830 |
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831 int promptflag (int n) |
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832 { |
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833 int retval = pflag; |
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834 pflag = n; |
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835 return retval; |
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836 } |
1826 | 837 |
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838 std::string input_source (void) const { return "push buffer"; } |
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839 |
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840 int fill_flex_buffer (char *buf, unsigned int max_size); |
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841 |
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842 protected: |
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843 |
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844 int pflag; |
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845 |
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846 // No copying! |
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847 |
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848 push_lexer (const push_lexer&); |
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849 |
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850 push_lexer& operator = (const push_lexer&); |
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851 }; |
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852 } |
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853 |
1 | 854 #endif |