Mercurial > octave
annotate libinterp/parse-tree/lex.h @ 27983:44a019d01aa5 stable
fix more spelling errors (bug #57613)
* file-editor-tab.cc, interpreter.h, octave-link.cc, lex.h, paren.m, perl.m,
print.m: Fix spelling errors found by codespell.
author | Mike Miller <mtmiller@octave.org> |
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date | Tue, 21 Jan 2020 13:33:02 -0800 |
parents | 00f796120a6d |
children | ab22056e8c1f |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2019 John W. Eaton |
1 | 4 |
5 This file is part of Octave. | |
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. |
1 | 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. |
1 | 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 |
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19 <https://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 <list> |
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30 #include <set> |
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31 #include <stack> |
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32 |
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33 #include "comment-list.h" |
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34 #include "input.h" |
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35 #include "symscope.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 iskeyword (const std::string& s); |
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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) |
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59 : m_frame_stack () { } |
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60 |
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61 ~symbol_table_context (void) { clear (); } |
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62 |
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63 void clear (void); |
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64 |
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65 bool empty (void) const { return m_frame_stack.empty (); } |
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66 |
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67 size_t size (void) const { return m_frame_stack.size (); } |
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68 |
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69 void pop (void); |
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70 |
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71 void push (const symbol_scope& scope) |
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72 { |
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73 m_frame_stack.push_front (scope); |
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74 } |
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75 |
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76 symbol_scope curr_scope (void) const; |
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77 symbol_scope parent_scope (void) const; |
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78 |
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79 private: |
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80 |
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81 std::deque<symbol_scope> m_frame_stack; |
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82 }; |
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83 |
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84 // Track nesting of square brackets, curly braces, and parentheses. |
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85 |
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86 class bbp_nesting_level |
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87 { |
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88 private: |
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89 |
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90 enum bracket_type |
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91 { |
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92 BRACKET = 1, |
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93 BRACE = 2, |
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94 PAREN = 3, |
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95 ANON_FCN_BODY = 4 |
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96 }; |
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97 |
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98 public: |
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99 |
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100 bbp_nesting_level (void) : m_context () { } |
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101 |
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102 bbp_nesting_level (const bbp_nesting_level& nl) |
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103 : m_context (nl.m_context) |
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104 { } |
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105 |
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106 bbp_nesting_level& operator = (const bbp_nesting_level& nl) |
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107 { |
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108 if (&nl != this) |
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109 m_context = nl.m_context; |
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110 |
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111 return *this; |
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112 } |
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113 |
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114 ~bbp_nesting_level (void) = default; |
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115 |
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116 // Alias for clear function. |
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117 void reset (void) { clear (); } |
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118 |
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119 void bracket (void) { m_context.push (BRACKET); } |
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120 |
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121 bool is_bracket (void) |
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122 { |
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123 return ! m_context.empty () && m_context.top () == BRACKET; |
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124 } |
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125 |
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126 void brace (void) { m_context.push (BRACE); } |
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127 |
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128 bool is_brace (void) |
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129 { |
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130 return ! m_context.empty () && m_context.top () == BRACE; |
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131 } |
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132 |
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133 void paren (void) { m_context.push (PAREN); } |
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134 |
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135 bool is_paren (void) |
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136 { |
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137 return ! m_context.empty () && m_context.top () == PAREN; |
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138 } |
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139 |
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140 void anon_fcn_body (void) { m_context.push (ANON_FCN_BODY); } |
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141 |
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142 bool is_anon_fcn_body (void) |
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143 { |
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144 return ! m_context.empty () && m_context.top () == ANON_FCN_BODY; |
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145 } |
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146 |
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147 bool is_bracket_or_brace (void) |
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148 { |
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149 return (! m_context.empty () |
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150 && (m_context.top () == BRACKET || m_context.top () == BRACE)); |
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151 } |
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152 |
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153 bool none (void) { return m_context.empty (); } |
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154 |
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155 void remove (void) |
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156 { |
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157 if (! m_context.empty ()) |
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158 m_context.pop (); |
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159 } |
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160 |
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161 void clear (void) |
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162 { |
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163 while (! m_context.empty ()) |
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164 m_context.pop (); |
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165 } |
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166 |
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167 private: |
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168 |
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169 std::stack<int> m_context; |
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170 }; |
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171 |
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172 class token_cache |
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173 { |
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174 public: |
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175 |
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176 // Store an "unlimited" number of tokens. |
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177 |
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178 // Tokens are allocated with new. Delete them when they are |
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179 // removed from the cache. |
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180 // |
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181 // One of the reasons for using this class instead of std::deque |
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182 // directly is that we can ensure that memory is cleaned up |
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183 // properly. It's more tedious to do that with deque since the |
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184 // deque destructor and clear method don't call delete on the |
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185 // elements that it stores. Another reason is that it makes it |
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186 // easier to change the implementation later if needed. |
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187 |
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188 token_cache (void) : m_buffer () { } |
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189 |
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190 // No copying! |
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191 |
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192 token_cache (const token_cache&) = delete; |
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193 |
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194 token_cache& operator = (const token_cache&) = delete; |
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195 |
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196 ~token_cache (void) { clear (); } |
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197 |
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198 void push (token *tok) |
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199 { |
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200 m_buffer.push_front (tok); |
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201 } |
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202 |
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203 void pop (void) |
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204 { |
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205 if (! empty ()) |
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206 { |
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207 delete m_buffer.back (); |
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208 m_buffer.pop_back (); |
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209 } |
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210 } |
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211 |
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212 // Direct access. |
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213 token * at (size_t n) |
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214 { |
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215 return empty () ? nullptr : m_buffer.at (n); |
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216 } |
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217 |
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218 const token * at (size_t n) const |
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219 { |
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220 return empty () ? nullptr : m_buffer.at (n); |
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221 } |
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222 |
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223 // Most recently pushed. |
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224 token * front (void) |
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225 { |
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226 return empty () ? nullptr : m_buffer.front (); |
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227 } |
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228 |
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229 const token * front (void) const |
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230 { |
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231 return empty () ? nullptr : m_buffer.front (); |
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232 } |
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233 |
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234 token * back (void) |
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235 { |
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236 return empty () ? nullptr : m_buffer.back (); |
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237 } |
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238 |
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239 const token * back (void) const |
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240 { |
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241 return empty () ? nullptr : m_buffer.back (); |
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242 } |
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243 |
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244 // Number of elements currently in the buffer. |
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245 size_t size (void) const { return m_buffer.size (); } |
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246 |
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247 bool empty (void) const { return m_buffer.empty (); } |
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248 |
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249 void clear (void) |
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250 { |
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251 while (! empty ()) |
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252 pop (); |
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253 } |
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254 |
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255 private: |
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256 |
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257 std::deque<token *> m_buffer; |
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258 }; |
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259 |
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260 lexical_feedback (void) |
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261 : m_end_of_input (false), |
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262 m_at_beginning_of_statement (true), |
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263 m_looking_at_anon_fcn_args (false), |
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264 m_looking_at_return_list (false), |
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265 m_looking_at_parameter_list (false), |
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266 m_looking_at_decl_list (false), |
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267 m_looking_at_initializer_expression (false), |
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268 m_looking_at_matrix_or_assign_lhs (false), |
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269 m_looking_for_object_index (false), |
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270 m_looking_at_indirect_ref (false), |
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271 m_parsing_class_method (false), |
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272 m_parsing_classdef (false), |
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273 m_maybe_classdef_get_set_method (false), |
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274 m_parsing_classdef_get_method (false), |
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275 m_parsing_classdef_set_method (false), |
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276 m_quote_is_transpose (false), |
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277 m_force_script (false), |
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278 m_reading_fcn_file (false), |
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279 m_reading_script_file (false), |
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280 m_reading_classdef_file (false), |
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281 m_buffer_function_text (false), |
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282 m_input_line_number (1), |
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283 m_current_input_column (1), |
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284 m_bracketflag (0), |
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285 m_braceflag (0), |
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286 m_looping (0), |
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287 m_defining_func (0), |
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288 m_looking_at_function_handle (0), |
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289 m_block_comment_nesting_level (0), |
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290 m_command_arg_paren_count (0), |
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291 m_token_count (0), |
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292 m_current_input_line (), |
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293 m_comment_text (), |
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294 m_help_text (), |
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295 m_function_text (), |
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296 m_string_text (), |
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297 m_string_line (0), |
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298 m_string_column (0), |
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299 m_fcn_file_name (), |
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300 m_fcn_file_full_name (), |
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301 m_dir_name (), |
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302 m_package_name (), |
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303 m_looking_at_object_index (), |
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304 m_parsed_function_name (), |
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305 m_pending_local_variables (), |
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306 m_symtab_context (), |
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307 m_nesting_level (), |
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308 m_tokens () |
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309 { |
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310 init (); |
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311 } |
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312 |
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313 // No copying! |
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314 |
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315 lexical_feedback (const lexical_feedback&) = delete; |
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316 |
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317 lexical_feedback& operator = (const lexical_feedback&) = delete; |
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318 |
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319 ~lexical_feedback (void); |
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320 |
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321 void init (void); |
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322 |
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323 void reset (void); |
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324 |
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325 int previous_token_value (void) const; |
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326 |
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327 bool previous_token_value_is (int tok_val) const; |
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328 |
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329 void mark_previous_token_trailing_space (void); |
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330 |
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331 bool space_follows_previous_token (void) const; |
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332 |
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333 bool previous_token_is_binop (void) const; |
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334 |
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335 bool previous_token_is_keyword (void) const; |
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336 |
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337 bool previous_token_may_be_command (void) const; |
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338 |
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339 void maybe_mark_previous_token_as_variable (void); |
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340 |
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341 void mark_as_variable (const std::string& nm); |
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342 void mark_as_variables (const std::list<std::string>& lst); |
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343 |
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344 // true means that we have encountered eof on the input stream. |
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345 bool m_end_of_input; |
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346 |
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347 // true means we are at the beginning of a statement, where a |
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348 // command name is possible. |
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349 bool m_at_beginning_of_statement; |
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350 |
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351 // true means we are parsing an anonymous function argument list. |
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352 bool m_looking_at_anon_fcn_args; |
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353 |
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354 // true means we're parsing the return list for a function. |
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355 bool m_looking_at_return_list; |
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356 |
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357 // true means we're parsing the parameter list for a function. |
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358 bool m_looking_at_parameter_list; |
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359 |
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360 // true means we're parsing a declaration list (global or |
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361 // persistent). |
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362 bool m_looking_at_decl_list; |
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363 |
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364 // true means we are looking at the initializer expression for a |
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365 // parameter list element. |
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366 bool m_looking_at_initializer_expression; |
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367 |
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368 // true means we're parsing a matrix or the left hand side of |
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369 // multi-value assignment statement. |
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370 bool m_looking_at_matrix_or_assign_lhs; |
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371 |
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372 // object index not possible until we've seen something. |
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373 bool m_looking_for_object_index; |
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374 |
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375 // true means we're looking at an indirect reference to a |
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376 // structure element. |
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377 bool m_looking_at_indirect_ref; |
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378 |
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379 // true means we are parsing a class method in function or classdef file. |
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380 bool m_parsing_class_method; |
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381 |
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382 // true means we are parsing a classdef file |
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383 bool m_parsing_classdef; |
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384 |
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385 // true means we are parsing a class method declaration line in a |
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386 // classdef file and can accept a property get or set method name. |
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387 // for example, "get.propertyname" is recognized as a function name. |
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388 bool m_maybe_classdef_get_set_method; |
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389 |
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390 // TRUE means we are parsing a classdef get.method. |
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391 bool m_parsing_classdef_get_method; |
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392 |
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393 // TRUE means we are parsing a classdef set.method. |
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394 bool m_parsing_classdef_set_method; |
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395 |
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396 // return transpose or start a string? |
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397 bool m_quote_is_transpose; |
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398 |
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399 // TRUE means treat the current file as a script even if the first |
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400 // token is "function" or "classdef". |
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401 bool m_force_script; |
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402 |
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403 // TRUE means we're parsing a function file. |
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404 bool m_reading_fcn_file; |
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405 |
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406 // TRUE means we're parsing a script file. |
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407 bool m_reading_script_file; |
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408 |
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409 // TRUE means we're parsing a classdef file. |
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410 bool m_reading_classdef_file; |
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411 |
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412 // TRUE means we should store the text of the function we are |
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413 // parsing. |
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414 bool m_buffer_function_text; |
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415 |
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416 // the current input line number. |
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417 int m_input_line_number; |
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418 |
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419 // the column of the current token. |
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420 int m_current_input_column; |
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421 |
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422 // square bracket level count. |
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423 int m_bracketflag; |
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424 |
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425 // curly brace level count. |
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426 int m_braceflag; |
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427 |
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428 // true means we're in the middle of defining a loop. |
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429 int m_looping; |
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430 |
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431 // nonzero means we're in the middle of defining a function. |
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432 int m_defining_func; |
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433 |
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434 // nonzero means we are parsing a function handle. |
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435 int m_looking_at_function_handle; |
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436 |
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437 // nestng level for block comments. |
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438 int m_block_comment_nesting_level; |
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439 |
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440 // Parenthesis count for command argument parsing. |
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441 int m_command_arg_paren_count; |
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442 |
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443 // Count of tokens recognized by this lexer since initialized or |
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444 // since the last reset. |
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445 size_t m_token_count; |
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446 |
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447 // The current line of input. |
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448 std::string m_current_input_line; |
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449 |
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450 // The current comment text. |
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451 std::string m_comment_text; |
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452 |
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453 // The current help text. |
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454 std::string m_help_text; |
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455 |
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456 // The text of functions entered on the command line. |
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457 std::string m_function_text; |
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458 |
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459 // The current character string text. |
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460 std::string m_string_text; |
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461 |
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462 // The position of the beginning of the current character string. |
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463 int m_string_line; |
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464 int m_string_column; |
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465 |
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466 // Simple name of function file we are reading. |
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467 std::string m_fcn_file_name; |
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468 |
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469 // Full name of file we are reading. |
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470 std::string m_fcn_file_full_name; |
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471 |
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472 // Directory name where this file was found. May be relative. |
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473 std::string m_dir_name; |
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474 |
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475 // Name of +package containing this file, if any. |
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476 std::string m_package_name; |
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477 |
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478 // if the front of the list is true, the closest paren, brace, or |
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479 // bracket nesting is an index for an object. |
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480 std::list<bool> m_looking_at_object_index; |
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481 |
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482 // if the top of the stack is true, then we've already seen the name |
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483 // of the current function. should only matter if |
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484 // current_function_level > 0 |
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485 std::stack<bool> m_parsed_function_name; |
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486 |
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487 // set of identifiers that might be local variable names. |
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488 std::set<std::string> m_pending_local_variables; |
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489 |
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490 // Track current symbol table scope and context. |
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491 symbol_table_context m_symtab_context; |
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492 |
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493 // is the closest nesting level a square bracket, squiggly brace, |
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494 // a paren, or an anonymous function body? |
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495 bbp_nesting_level m_nesting_level; |
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496 |
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497 // Tokens generated by the lexer. |
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498 token_cache m_tokens; |
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499 }; |
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500 |
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501 // base_lexer inherits from lexical_feedback because we will |
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502 // eventually have several different constructors and it is easier to |
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503 // initialize if everything is grouped in a parent class rather than |
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504 // listing all the members in the base_lexer class. |
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505 |
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506 class |
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507 base_lexer : public lexical_feedback |
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508 { |
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509 public: |
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510 |
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511 // Handle buffering of input for lexer. |
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512 |
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513 class input_buffer |
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514 { |
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515 public: |
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516 |
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517 input_buffer (void) |
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518 : m_buffer (), m_pos (nullptr), m_chars_left (0), m_eof (false) |
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519 { } |
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520 |
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521 void fill (const std::string& input, bool eof_arg); |
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522 |
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523 // Copy at most max_size characters to buf. |
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524 int copy_chunk (char *buf, size_t max_size); |
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525 |
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526 bool empty (void) const { return m_chars_left == 0; } |
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527 |
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528 bool at_eof (void) const { return m_eof; } |
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529 |
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530 private: |
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531 |
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532 std::string m_buffer; |
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533 const char *m_pos; |
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534 size_t m_chars_left; |
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535 bool m_eof; |
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536 }; |
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537 |
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538 // Collect comment text. |
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539 |
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540 class |
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541 comment_buffer |
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542 { |
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543 public: |
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544 |
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545 comment_buffer (void) : m_comment_list (nullptr) { } |
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546 |
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547 ~comment_buffer (void) { delete m_comment_list; } |
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548 |
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549 void append (const std::string& s, comment_elt::comment_type t) |
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550 { |
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551 if (! m_comment_list) |
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552 m_comment_list = new comment_list (); |
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553 |
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554 m_comment_list->append (s, t); |
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555 } |
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556 |
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557 // Caller is expected to delete the returned value. |
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558 |
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559 comment_list * get_comment (void) |
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560 { |
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561 comment_list *retval = m_comment_list; |
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562 |
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563 m_comment_list = nullptr; |
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564 |
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565 return retval; |
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566 } |
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567 |
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568 void reset (void) |
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569 { |
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570 delete m_comment_list; |
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571 |
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572 m_comment_list = nullptr; |
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573 } |
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574 |
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575 private: |
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576 |
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577 comment_list *m_comment_list; |
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578 }; |
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579 |
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580 base_lexer (interpreter& interp) |
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581 : lexical_feedback (), m_scanner (nullptr), m_input_buf (), |
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582 m_comment_buf (), m_interpreter (interp) |
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583 { |
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584 init (); |
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585 } |
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586 |
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587 // No copying! |
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588 |
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589 base_lexer (const base_lexer&) = delete; |
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590 |
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591 base_lexer& operator = (const base_lexer&) = delete; |
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592 |
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593 virtual ~base_lexer (void); |
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594 |
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595 void init (void); |
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596 |
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597 virtual bool is_push_lexer (void) const { return false; } |
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598 |
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599 virtual void reset (void); |
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600 |
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601 void prep_for_file (void); |
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602 |
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603 void begin_string (int state); |
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604 |
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605 virtual int fill_flex_buffer (char *buf, unsigned int max_size) = 0; |
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606 |
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607 bool at_end_of_buffer (void) const { return m_input_buf.empty (); } |
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608 |
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609 bool at_end_of_file (void) const { return m_input_buf.at_eof (); } |
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610 |
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611 int handle_end_of_input (void); |
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612 |
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613 char * flex_yytext (void); |
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614 |
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615 int flex_yyleng (void); |
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616 |
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617 int text_yyinput (void); |
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618 |
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619 void xunput (char c, char *buf); |
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620 |
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621 void xunput (char c); |
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622 |
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623 bool looking_at_space (void); |
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624 |
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625 bool inside_any_object_index (void); |
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626 |
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627 bool is_variable (const std::string& name, const symbol_scope& scope); |
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628 |
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629 int is_keyword_token (const std::string& s); |
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630 |
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631 bool fq_identifier_contains_keyword (const std::string& s); |
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632 |
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633 bool whitespace_is_significant (void); |
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634 |
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635 void handle_number (void); |
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636 |
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637 void handle_continuation (void); |
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638 |
23750
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639 void finish_comment (comment_elt::comment_type typ); |
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640 |
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641 comment_list * get_comment (void) { return m_comment_buf.get_comment (); } |
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642 |
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643 int handle_close_bracket (int bracket_type); |
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644 |
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645 bool looks_like_command_arg (void); |
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646 |
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647 int handle_superclass_identifier (void); |
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648 |
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649 int handle_meta_identifier (void); |
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650 |
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651 int handle_fq_identifier (void); |
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652 |
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653 int handle_identifier (void); |
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654 |
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655 void maybe_warn_separator_insert (char sep); |
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656 |
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657 void warn_single_quote_string (void); |
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658 |
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659 void warn_language_extension (const std::string& msg); |
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660 |
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661 void maybe_warn_language_extension_comment (char c); |
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662 |
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663 void warn_language_extension_continuation (void); |
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664 |
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665 void warn_language_extension_operator (const std::string& op); |
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666 |
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667 void push_token (token *); |
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668 |
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669 token * current_token (void); |
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670 |
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671 void display_token (int tok); |
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672 |
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673 void fatal_error (const char *msg); |
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674 |
25443
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675 bool debug_flag (void) const; |
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676 |
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677 bool display_tokens (void) const; |
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678 |
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679 void increment_token_count (void); |
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680 |
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681 void lexer_debug (const char *pattern); |
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682 |
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683 // Internal state of the flex-generated lexer. |
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684 void *m_scanner; |
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685 |
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686 // Object that reads and buffers input. |
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687 input_buffer m_input_buf; |
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688 |
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689 // Object that collects comment text. |
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690 comment_buffer m_comment_buf; |
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691 |
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692 // Interpreter that contains us, if any. |
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693 interpreter& m_interpreter; |
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694 |
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695 virtual void increment_promptflag (void) = 0; |
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696 |
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697 virtual void decrement_promptflag (void) = 0; |
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698 |
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699 virtual int promptflag (void) const = 0; |
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700 |
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701 virtual int promptflag (int) = 0; |
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702 |
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703 virtual std::string input_source (void) const { return "unknown"; } |
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704 |
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705 virtual bool input_from_terminal (void) const { return false; } |
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706 |
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707 virtual bool input_from_file (void) const { return false; } |
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708 |
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709 virtual bool input_from_eval_string (void) const { return false; } |
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|
710 |
25994
f881d3e271d2
eliminate global and file-scope static variables in oct-hist.cc
John W. Eaton <jwe@octave.org>
parents:
25443
diff
changeset
|
711 bool input_from_tmp_history_file (void); |
f881d3e271d2
eliminate global and file-scope static variables in oct-hist.cc
John W. Eaton <jwe@octave.org>
parents:
25443
diff
changeset
|
712 |
22196
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
John W. Eaton <jwe@octave.org>
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|
713 void push_start_state (int state); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
714 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
715 void pop_start_state (void); |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
716 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
717 void clear_start_state (void); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
718 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
719 int start_state (void) const { return start_state_stack.top (); } |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
720 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
721 void display_start_state (void) const; |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
722 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
723 int handle_op (const char *pattern, int tok, bool bos = false); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
724 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
725 int handle_language_extension_op (const char *pattern, int tok, |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
726 bool bos = false); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
727 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
728 bool maybe_unput_comma_before_unary_op (int tok); |
16183
359d56094efa
handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
729 |
22196
dd992fd74fce
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changeset
|
730 int handle_unary_op (int tok, bool bos = false); |
dd992fd74fce
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|
731 |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
732 int handle_language_extension_unary_op (int tok, bool bos = false); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
733 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
734 int handle_assign_op (const char *pattern, int tok); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
735 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
736 int handle_language_extension_assign_op (const char *pattern, int tok); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
737 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
738 int handle_op_internal (int tok, bool bos, bool compat); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
739 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
740 int handle_token (const std::string& name, int tok); |
dd992fd74fce
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changeset
|
741 |
23457
21baad6b35c4
maint: Use C++11 nullptr rather than 0 or NULL when possible.
Rik <rik@octave.org>
parents:
23446
diff
changeset
|
742 int handle_token (int tok, token *tok_val = nullptr); |
22196
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|
743 |
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changeset
|
744 int count_token (int tok); |
dd992fd74fce
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|
745 |
dd992fd74fce
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changeset
|
746 int count_token_internal (int tok); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
747 |
dd992fd74fce
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changeset
|
748 int show_token (int tok); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
749 |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
750 void enable_fq_identifier (void); |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
751 |
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|
752 protected: |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
753 |
dd992fd74fce
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changeset
|
754 std::stack<int> start_state_stack; |
16183
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diff
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|
755 }; |
359d56094efa
handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
756 |
17693
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
757 class |
22196
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|
758 lexer : public base_lexer |
17693
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diff
changeset
|
759 { |
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
760 public: |
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
16898
diff
changeset
|
761 |
25441
143007dad864
store reference instead of pointer to interpreter in lexer
John W. Eaton <jwe@octave.org>
parents:
25438
diff
changeset
|
762 lexer (interpreter& interp) |
24833
7c88cf242111
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
763 : base_lexer (interp), m_reader (this) |
22196
dd992fd74fce
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changeset
|
764 { } |
17693
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
16898
diff
changeset
|
765 |
25441
143007dad864
store reference instead of pointer to interpreter in lexer
John W. Eaton <jwe@octave.org>
parents:
25438
diff
changeset
|
766 lexer (FILE *file, interpreter& interp) |
24833
7c88cf242111
use m_ prefix for data members in more classes
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parents:
24534
diff
changeset
|
767 : base_lexer (interp), m_reader (file, this) |
22196
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
John W. Eaton <jwe@octave.org>
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diff
changeset
|
768 { } |
17693
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
16898
diff
changeset
|
769 |
25441
143007dad864
store reference instead of pointer to interpreter in lexer
John W. Eaton <jwe@octave.org>
parents:
25438
diff
changeset
|
770 lexer (const std::string& eval_string, interpreter& interp) |
24833
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parents:
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diff
changeset
|
771 : base_lexer (interp), m_reader (eval_string, this) |
22196
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parents:
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|
772 { } |
17693
efbe746f8fa8
eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents:
16898
diff
changeset
|
773 |
22869
f75d289645ec
make deleted functions public
John W. Eaton <jwe@octave.org>
parents:
22868
diff
changeset
|
774 // No copying! |
f75d289645ec
make deleted functions public
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parents:
22868
diff
changeset
|
775 |
f75d289645ec
make deleted functions public
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parents:
22868
diff
changeset
|
776 lexer (const lexer&) = delete; |
f75d289645ec
make deleted functions public
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parents:
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diff
changeset
|
777 |
f75d289645ec
make deleted functions public
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diff
changeset
|
778 lexer& operator = (const lexer&) = delete; |
f75d289645ec
make deleted functions public
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parents:
22868
diff
changeset
|
779 |
17693
efbe746f8fa8
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parents:
16898
diff
changeset
|
780 void reset (void) |
efbe746f8fa8
eliminate octave_comment_buffer singleton
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parents:
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diff
changeset
|
781 { |
24833
7c88cf242111
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parents:
24534
diff
changeset
|
782 m_reader.reset (); |
22196
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diff
changeset
|
783 |
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John W. Eaton <jwe@octave.org>
parents:
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changeset
|
784 base_lexer::reset (); |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
785 } |
dd992fd74fce
put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
786 |
24833
7c88cf242111
use m_ prefix for data members in more classes
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parents:
24534
diff
changeset
|
787 void increment_promptflag (void) { m_reader.increment_promptflag (); } |
17693
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parents:
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diff
changeset
|
788 |
24833
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
789 void decrement_promptflag (void) { m_reader.decrement_promptflag (); } |
22196
dd992fd74fce
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diff
changeset
|
790 |
24833
7c88cf242111
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parents:
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diff
changeset
|
791 int promptflag (void) const { return m_reader.promptflag (); } |
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parents:
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diff
changeset
|
792 |
24833
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parents:
24534
diff
changeset
|
793 int promptflag (int n) { return m_reader.promptflag (n); } |
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diff
changeset
|
794 |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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parents:
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changeset
|
795 std::string input_source (void) const |
dd992fd74fce
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diff
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|
796 { |
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parents:
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diff
changeset
|
797 return m_reader.input_source (); |
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parents:
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diff
changeset
|
798 } |
efbe746f8fa8
eliminate octave_comment_buffer singleton
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parents:
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diff
changeset
|
799 |
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|
800 bool input_from_terminal (void) const |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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|
801 { |
24833
7c88cf242111
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changeset
|
802 return m_reader.input_from_terminal (); |
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|
803 } |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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parents:
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changeset
|
804 |
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changeset
|
805 bool input_from_file (void) const |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
806 { |
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7c88cf242111
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parents:
24534
diff
changeset
|
807 return m_reader.input_from_file (); |
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changeset
|
808 } |
17693
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eliminate octave_comment_buffer singleton
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parents:
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diff
changeset
|
809 |
22196
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changeset
|
810 bool input_from_eval_string (void) const |
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|
811 { |
24833
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parents:
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changeset
|
812 return m_reader.input_from_eval_string (); |
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|
813 } |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
814 |
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put parser, lexer, and evaluator in namespace; interpreter now owns evaluator
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changeset
|
815 int fill_flex_buffer (char *buf, unsigned int max_size); |
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changeset
|
816 |
24833
7c88cf242111
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changeset
|
817 input_reader m_reader; |
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John W. Eaton <jwe@octave.org>
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changeset
|
818 }; |
efbe746f8fa8
eliminate octave_comment_buffer singleton
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changeset
|
819 |
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|
820 class |
dd992fd74fce
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changeset
|
821 push_lexer : public base_lexer |
16195
b52d2f9294b6
use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents:
16194
diff
changeset
|
822 { |
22196
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changeset
|
823 public: |
16113
7c5e5e97a3bc
move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents:
16111
diff
changeset
|
824 |
25441
143007dad864
store reference instead of pointer to interpreter in lexer
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parents:
25438
diff
changeset
|
825 push_lexer (interpreter& interp) |
24833
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diff
changeset
|
826 : base_lexer (interp), m_pflag (1) |
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827 { |
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828 append_input ("", false); |
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829 } |
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830 |
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831 push_lexer (const std::string& input, interpreter& interp) |
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832 : base_lexer (interp), m_pflag (1) |
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833 { |
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834 append_input (input, false); |
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835 } |
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836 |
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837 push_lexer (bool eof, interpreter& interp) |
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838 : base_lexer (interp), m_pflag (1) |
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839 { |
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840 append_input ("", eof); |
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841 } |
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842 |
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843 push_lexer (const std::string& input, bool eof, interpreter& interp) |
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844 : base_lexer (interp), m_pflag (1) |
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845 { |
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846 append_input (input, eof); |
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847 } |
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848 |
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849 // No copying! |
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850 |
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851 push_lexer (const push_lexer&) = delete; |
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852 |
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853 push_lexer& operator = (const push_lexer&) = delete; |
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854 |
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855 bool is_push_lexer (void) const { return true; } |
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856 |
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857 void reset (void) |
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858 { |
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859 promptflag (1); |
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860 |
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861 base_lexer::reset (); |
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862 } |
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863 |
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864 void append_input (const std::string& input, bool eof); |
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865 |
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866 void increment_promptflag (void) { m_pflag++; } |
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867 |
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868 void decrement_promptflag (void) { m_pflag--; } |
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869 |
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870 int promptflag (void) const { return m_pflag; } |
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871 |
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872 int promptflag (int n) |
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873 { |
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874 int retval = m_pflag; |
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875 m_pflag = n; |
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876 return retval; |
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877 } |
1826 | 878 |
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879 std::string input_source (void) const { return "push buffer"; } |
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880 |
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881 int fill_flex_buffer (char *buf, unsigned int max_size); |
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882 |
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883 protected: |
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884 |
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885 int m_pflag; |
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886 }; |
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887 } |
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888 |
1 | 889 #endif |