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annotate libinterp/parse-tree/lex.h @ 21814:0b5fd19477fd

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when parsing function, check variable status in new function scope (bug #48031) * lex.h, lex.ll (octave_base_lexer::is_variable): New argument, scope. Pass scope to symbol_table::is_variable. (octave_base_lexer::handle_identifier): Pass scope id of function that is being parsed to is_variable.
author John W. Eaton <jwe@octave.org>
date Wed, 01 Jun 2016 19:02:03 -0400
parents 1473547f50f5
children dd992fd74fce
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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4197fc428c7d maint: Update copyright notices for 2015.
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3 Copyright (C) 1993-2015 John W. Eaton
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4
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5 This file is part of Octave.
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6
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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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 the
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9 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
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10 option) any later version.
1
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11
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
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21 */
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22
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23 #if ! defined (octave_lex_h)
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24 #define octave_lex_h 1
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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 // Is the given string a keyword?
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39 extern bool is_keyword (const std::string& s);
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40
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41 // For communication between the lexer and parser.
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42
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43 class
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44 lexical_feedback
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45 {
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46 public:
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47
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48 // Track symbol table information when parsing functions.
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49
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50 class symbol_table_context
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51 {
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52 public:
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53
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54 symbol_table_context (void) : frame_stack () { }
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55
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56 void clear (void)
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57 {
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58 while (! frame_stack.empty ())
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59 frame_stack.pop ();
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60 }
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61
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62 bool empty (void) const { return frame_stack.empty (); }
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63
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64 void pop (void)
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65 {
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66 if (empty ())
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67 panic_impossible ();
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68
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69 frame_stack.pop ();
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70 }
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71
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72 void push (symbol_table::scope_id scope = symbol_table::current_scope ())
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73 {
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74 frame_stack.push (scope);
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75 }
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76
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77 symbol_table::scope_id curr_scope (void) const
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78 {
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79 return empty () ? symbol_table::current_scope () : frame_stack.top ();
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80 }
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81
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82 private:
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83
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84 std::stack<symbol_table::scope_id> frame_stack;
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85 };
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86
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87 // Track nesting of square brackets, curly braces, and parentheses.
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88
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89 class bbp_nesting_level
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90 {
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91 private:
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92
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93 enum bracket_type
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94 {
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95 BRACKET = 1,
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96 BRACE = 2,
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97 PAREN = 3,
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98 ANON_FCN_BODY = 4
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99 };
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100
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101 public:
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102
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103 bbp_nesting_level (void) : context () { }
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104
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105 bbp_nesting_level (const bbp_nesting_level& nl) : context (nl.context) { }
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106
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107 bbp_nesting_level& operator = (const bbp_nesting_level& nl)
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108 {
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109 if (&nl != this)
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110 context = nl.context;
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111
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112 return *this;
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113 }
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114
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115 ~bbp_nesting_level (void) { }
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116
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117 void reset (void)
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118 {
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119 while (! context.empty ())
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120 context.pop ();
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121 }
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122
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123 void bracket (void) { context.push (BRACKET); }
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124
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125 bool is_bracket (void)
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126 {
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127 return ! context.empty () && context.top () == BRACKET;
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128 }
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129
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130 void brace (void) { context.push (BRACE); }
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131
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132 bool is_brace (void)
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133 {
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134 return ! context.empty () && context.top () == BRACE;
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135 }
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136
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137 void paren (void) { context.push (PAREN); }
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138
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139 bool is_paren (void)
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140 {
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141 return ! context.empty () && context.top () == PAREN;
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142 }
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143
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144 void anon_fcn_body (void) { context.push (ANON_FCN_BODY); }
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145
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146 bool is_anon_fcn_body (void)
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147 {
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148 return ! context.empty () && context.top () == ANON_FCN_BODY;
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149 }
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150
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151 bool is_bracket_or_brace (void)
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152 {
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153 return (! context.empty ()
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154 && (context.top () == BRACKET || context.top () == BRACE));
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155 }
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156
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157 bool none (void) { return context.empty (); }
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158
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159 void remove (void)
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160 {
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161 if (! context.empty ())
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162 context.pop ();
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163 }
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164
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165 void clear (void)
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166 {
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167 while (! context.empty ())
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168 context.pop ();
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169 }
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170
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171 private:
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172
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173 std::stack<int> context;
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174 };
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175
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176 class token_cache
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177 {
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178 public:
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179
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180 // Store an "unlimited" number of tokens.
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181 token_cache (size_t sz_arg = std::numeric_limits<size_t>::max ())
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182 : buffer (), sz (sz_arg)
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183 { }
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184
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185 void push (token *tok)
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186 {
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187 if (buffer.size () == sz)
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188 pop ();
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189
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190 buffer.push_front (tok);
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191 }
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192
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193 void pop (void)
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194 {
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195 if (! empty ())
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196 {
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197 delete buffer.back ();
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198 buffer.pop_back ();
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199 }
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200 }
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201
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202 // Direct access.
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203 token *at (size_t n)
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204 {
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205 return empty () ? 0 : buffer.at (n);
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206 }
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207
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208 const token *at (size_t n) const
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209 {
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210 return empty () ? 0 : buffer.at (n);
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211 }
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212
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213 // Most recently pushed.
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214 token *front (void)
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215 {
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216 return empty () ? 0 : buffer.front ();
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217 }
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218
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219 const token *front (void) const
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220 {
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221 return empty () ? 0 : buffer.front ();
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222 }
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223
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224 token *back (void)
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225 {
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226 return empty () ? 0 : buffer.back ();
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227 }
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228
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229 const token *back (void) const
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230 {
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231 return empty () ? 0 : buffer.back ();
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232 }
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233
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234 // Number of elements currently in the buffer, max of sz.
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235 size_t size (void) const { return buffer.size (); }
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236
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237 bool empty (void) const { return buffer.empty (); }
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238
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239 void clear (void)
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240 {
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241 while (! empty ())
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242 pop ();
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243 }
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244
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245 private:
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246
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247 std::deque<token *> buffer;
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248
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249 size_t sz;
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250
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251 // No copying!
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252
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253 token_cache (const token_cache&);
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254
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255 token_cache& operator = (const token_cache&);
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256 };
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257
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258 lexical_feedback (void)
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259 : end_of_input (false), at_beginning_of_statement (true),
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260 looking_at_anon_fcn_args (false), looking_at_return_list (false),
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261 looking_at_parameter_list (false), looking_at_decl_list (false),
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262 looking_at_initializer_expression (false),
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263 looking_at_matrix_or_assign_lhs (false),
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diff changeset
264 looking_for_object_index (false),
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265 looking_at_indirect_ref (false), parsing_class_method (false),
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266 parsing_classdef (false), maybe_classdef_get_set_method (false),
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267 parsing_classdef_get_method (false),
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268 parsing_classdef_set_method (false),
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269 quote_is_transpose (false), force_script (false),
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270 reading_fcn_file (false), reading_script_file (false),
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271 reading_classdef_file (false),
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272 input_line_number (1), current_input_column (1),
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273 bracketflag (0), braceflag (0),
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274 looping (0), defining_func (0), looking_at_function_handle (0),
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275 block_comment_nesting_level (0), command_arg_paren_count (0),
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276 token_count (0), current_input_line (), comment_text (),
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277 help_text (), string_text (), string_line (0), string_column (0),
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278 fcn_file_name (), fcn_file_full_name (), looking_at_object_index (),
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diff changeset
279 parsed_function_name (), pending_local_variables (),
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280 symtab_context (), nesting_level (), tokens ()
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281 {
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282 init ();
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283 }
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284
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285 ~lexical_feedback (void);
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286
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287 void init (void);
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288
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289 void reset (void);
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290
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291 int previous_token_value (void) const;
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292
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293 bool previous_token_value_is (int tok_val) const;
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294
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295 void mark_previous_token_trailing_space (void);
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296
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297 bool space_follows_previous_token (void) const;
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298
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299 bool previous_token_is_binop (void) const;
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300
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301 bool previous_token_is_keyword (void) const;
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302
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303 bool previous_token_may_be_command (void) const;
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304
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305 void maybe_mark_previous_token_as_variable (void);
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306
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307 void mark_as_variable (const std::string& nm);
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308 void mark_as_variables (const std::list<std::string>& lst);
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309
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310 // true means that we have encountered eof on the input stream.
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311 bool end_of_input;
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312
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313 // true means we are at the beginning of a statement, where a
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314 // command name is possible.
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315 bool at_beginning_of_statement;
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316
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317 // true means we are parsing an anonymous function argument list.
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318 bool looking_at_anon_fcn_args;
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319
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320 // true means we're parsing the return list for a function.
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321 bool looking_at_return_list;
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322
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323 // true means we're parsing the parameter list for a function.
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324 bool looking_at_parameter_list;
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325
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326 // true means we're parsing a declaration list (global or
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327 // persistent).
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328 bool looking_at_decl_list;
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329
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330 // true means we are looking at the initializer expression for a
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331 // parameter list element.
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332 bool looking_at_initializer_expression;
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333
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334 // true means we're parsing a matrix or the left hand side of
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335 // multi-value assignment statement.
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336 bool looking_at_matrix_or_assign_lhs;
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337
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338 // object index not possible until we've seen something.
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339 bool looking_for_object_index;
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340
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341 // true means we're looking at an indirect reference to a
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342 // structure element.
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343 bool looking_at_indirect_ref;
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344
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345 // true means we are parsing a class method in function or classdef file.
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346 bool parsing_class_method;
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347
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348 // true means we are parsing a classdef file
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349 bool parsing_classdef;
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350
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351 // true means we are parsing a class method declaration line in a
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352 // classdef file and can accept a property get or set method name.
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353 // for example, "get.propertyname" is recognized as a function name.
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354 bool maybe_classdef_get_set_method;
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355
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356 // TRUE means we are parsing a classdef get.method.
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357 bool parsing_classdef_get_method;
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358
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359 // TRUE means we are parsing a classdef set.method.
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360 bool parsing_classdef_set_method;
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361
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362 // return transpose or start a string?
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363 bool quote_is_transpose;
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364
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365 // TRUE means treat the current file as a script even if the first
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366 // token is "function" or "classdef".
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367 bool force_script;
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368
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369 // TRUE means we're parsing a function file.
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370 bool reading_fcn_file;
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371
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372 // TRUE means we're parsing a script file.
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373 bool reading_script_file;
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374
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375 // TRUE means we're parsing a classdef file.
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376 bool reading_classdef_file;
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377
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378 // the current input line number.
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379 int input_line_number;
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380
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381 // the column of the current token.
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382 int current_input_column;
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383
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384 // square bracket level count.
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385 int bracketflag;
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diff changeset
386
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387 // curly brace level count.
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388 int braceflag;
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389
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390 // true means we're in the middle of defining a loop.
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391 int looping;
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392
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393 // nonzero means we're in the middle of defining a function.
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394 int defining_func;
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395
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396 // nonzero means we are parsing a function handle.
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397 int looking_at_function_handle;
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398
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399 // nestng level for blcok comments.
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400 int block_comment_nesting_level;
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diff changeset
401
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402 // Parenthesis count for command argument parsing.
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403 int command_arg_paren_count;
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diff changeset
404
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405 // Count of tokens recognized by this lexer since initialized or
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406 // since the last reset.
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407 size_t token_count;
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diff changeset
408
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409 // The current line of input.
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410 std::string current_input_line;
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411
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412 // The current comment text.
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413 std::string comment_text;
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diff changeset
414
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415 // The current help text.
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416 std::string help_text;
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417
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418 // The current character string text.
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419 std::string string_text;
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420
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421 // The position of the beginning of the current character string.
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422 int string_line;
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423 int string_column;
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424
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425 // Simple name of function file we are reading.
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426 std::string fcn_file_name;
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427
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428 // Full name of file we are reading.
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429 std::string fcn_file_full_name;
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430
16193
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431 // if the front of the list is true, the closest paren, brace, or
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432 // bracket nesting is an index for an object.
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433 std::list<bool> looking_at_object_index;
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434
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435 // if the top of the stack is true, then we've already seen the name
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436 // of the current function. should only matter if
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437 // current_function_level > 0
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438 std::stack<bool> parsed_function_name;
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diff changeset
439
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
440 // set of identifiers that might be local variable names.
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
441 std::set<std::string> pending_local_variables;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
442
16320
09f0cb9cac7d don't modify symbol table scope in the parser
John W. Eaton <jwe@octave.org>
parents: 16294
diff changeset
443 // Track current symbol table scope and context.
09f0cb9cac7d don't modify symbol table scope in the parser
John W. Eaton <jwe@octave.org>
parents: 16294
diff changeset
444 symbol_table_context symtab_context;
09f0cb9cac7d don't modify symbol table scope in the parser
John W. Eaton <jwe@octave.org>
parents: 16294
diff changeset
445
16265
71ee3afedb69 5/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16263
diff changeset
446 // is the closest nesting level a square bracket, squiggly brace,
71ee3afedb69 5/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16263
diff changeset
447 // a paren, or an anonymous function body?
16193
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
448 bbp_nesting_level nesting_level;
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
449
16230
4bf907906134 use a queue to hold tokens in the lexer
John W. Eaton <jwe@octave.org>
parents: 16229
diff changeset
450 // Tokens generated by the lexer.
4bf907906134 use a queue to hold tokens in the lexer
John W. Eaton <jwe@octave.org>
parents: 16229
diff changeset
451 token_cache tokens;
16193
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
452
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
453 private:
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
454
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
455 // No copying!
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
456
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
457 lexical_feedback (const lexical_feedback&);
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
458
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
459 lexical_feedback& operator = (const lexical_feedback&);
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
460 };
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
461
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
462 // octave_base_lexer inherits from lexical_feedback because we will
16193
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
463 // eventually have several different constructors and it is easier to
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
464 // intialize if everything is grouped in a parent class rather than
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
465 // listing all the members in the octave_base_lexer class.
16193
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
466
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
467 class
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
468 octave_base_lexer : public lexical_feedback
16193
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
469 {
d7392bf42fd1 use inheritance to simplify initialization in octave_lexer constructor
John W. Eaton <jwe@octave.org>
parents: 16185
diff changeset
470 public:
16104
c8974e28da59 move nesting_level to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16103
diff changeset
471
16183
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
472 // Handle buffering of input for lexer.
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
473
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John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
474 class input_buffer
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
475 {
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
476 public:
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
477
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
478 input_buffer (void)
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
479 : buffer (), pos (0), chars_left (0), eof (false)
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
480 { }
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
481
16195
b52d2f9294b6 use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents: 16194
diff changeset
482 void fill (const std::string& input, bool eof_arg);
16183
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
483
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
484 // Copy at most max_size characters to buf.
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
485 int copy_chunk (char *buf, size_t max_size);
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
486
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
487 bool empty (void) const { return chars_left == 0; }
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
488
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
489 bool at_eof (void) const { return eof; }
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
490
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
491 private:
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
492
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
493 std::string buffer;
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
494 const char *pos;
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
495 size_t chars_left;
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
496 bool eof;
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
497 };
359d56094efa handle lexer input buffering with class
John W. Eaton <jwe@octave.org>
parents: 16164
diff changeset
498
17693
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
499 // Collect comment text.
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
500
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
501 class
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
502 comment_buffer
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
503 {
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
504 public:
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
505
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
506 comment_buffer (void) : comment_list (0) { }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
507
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
508 ~comment_buffer (void) { delete comment_list; }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
509
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
510 void append (const std::string& s, octave_comment_elt::comment_type t)
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
511 {
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
512 if (! comment_list)
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
513 comment_list = new octave_comment_list ();
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
514
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
515 comment_list->append (s, t);
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
516 }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
517
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
518 // Caller is expected to delete the returned value.
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
519
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
520 octave_comment_list *get_comment (void)
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
521 {
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
522 octave_comment_list *retval = comment_list;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
523
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
524 comment_list = 0;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
525
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
526 return retval;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
527 }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
528
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
529 void reset (void)
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
530 {
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
531 delete comment_list;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
532
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
533 comment_list = 0;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
534 }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
535
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
536 private:
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
537
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
538 octave_comment_list *comment_list;
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
539 };
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
540
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
541 octave_base_lexer (void)
17693
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
542 : lexical_feedback (), scanner (0), input_buf (), comment_buf ()
16195
b52d2f9294b6 use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents: 16194
diff changeset
543 {
b52d2f9294b6 use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents: 16194
diff changeset
544 init ();
b52d2f9294b6 use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents: 16194
diff changeset
545 }
b52d2f9294b6 use class for reading lexer input
John W. Eaton <jwe@octave.org>
parents: 16194
diff changeset
546
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
547 virtual ~octave_base_lexer (void);
1826
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe]
jwe
parents: 1315
diff changeset
548
16149
49dfba4fd3c5 use pure parser and reentrant lexer interfaces
John W. Eaton <jwe@octave.org>
parents: 16139
diff changeset
549 void init (void);
1826
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe]
jwe
parents: 1315
diff changeset
550
16294
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
551 virtual bool is_push_lexer (void) const { return false; }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
552
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
553 virtual void reset (void);
16122
6884401b2fbb move reset_parser lexer helper function to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16120
diff changeset
554
16203
127cccb037bf move more global parser and lexer variables to classes
John W. Eaton <jwe@octave.org>
parents: 16199
diff changeset
555 void prep_for_file (void);
16124
3be725cd195b move more lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16122
diff changeset
556
16898
531473481084 rewrite string parsing to avoid unlimited lookahead
John W. Eaton <jwe@octave.org>
parents: 16360
diff changeset
557 void begin_string (int state);
531473481084 rewrite string parsing to avoid unlimited lookahead
John W. Eaton <jwe@octave.org>
parents: 16360
diff changeset
558
16293
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
559 virtual int fill_flex_buffer (char *buf, unsigned int max_size) = 0;
16120
4b68eb9b98b0 move octave_read lexer helper function to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16118
diff changeset
560
16294
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
561 bool at_end_of_buffer (void) const { return input_buf.empty (); }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
562
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
563 bool at_end_of_file (void) const { return input_buf.at_eof (); }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
564
16164
c5bfdc4c0963 move end_of_input flag from octve_parser class to octave_lexer class
John W. Eaton <jwe@octave.org>
parents: 16158
diff changeset
565 int handle_end_of_input (void);
c5bfdc4c0963 move end_of_input flag from octve_parser class to octave_lexer class
John W. Eaton <jwe@octave.org>
parents: 16158
diff changeset
566
16128
210039e91ad6 localize use of yytext with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16126
diff changeset
567 char *flex_yytext (void);
210039e91ad6 localize use of yytext with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16126
diff changeset
568
16130
421dea028bbf localize use of yyleng with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16129
diff changeset
569 int flex_yyleng (void);
421dea028bbf localize use of yyleng with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16129
diff changeset
570
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
571 int text_yyinput (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
572
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
573 void xunput (char c, char *buf);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
574
16125
96a58f197f93 allow xunput to be called without buffer argument
John W. Eaton <jwe@octave.org>
parents: 16124
diff changeset
575 void xunput (char c);
96a58f197f93 allow xunput to be called without buffer argument
John W. Eaton <jwe@octave.org>
parents: 16124
diff changeset
576
16275
dd7de0345124 10/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16267
diff changeset
577 bool looking_at_space (void);
dd7de0345124 10/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16267
diff changeset
578
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
579 bool inside_any_object_index (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
580
21814
0b5fd19477fd when parsing function, check variable status in new function scope (bug #48031)
John W. Eaton <jwe@octave.org>
parents: 21244
diff changeset
581 bool is_variable (const std::string& name, symbol_table::scope_id scope);
16360
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 16337
diff changeset
582
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
583 int is_keyword_token (const std::string& s);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
584
18520
932aca9a7c57 Allow multi-level classdef package.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
585 bool fq_identifier_contains_keyword (const std::string& s);
932aca9a7c57 Allow multi-level classdef package.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
586
16257
db7f07b22b9b 1/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16255
diff changeset
587 bool whitespace_is_significant (void);
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John W. Eaton <jwe@octave.org>
parents: 16255
diff changeset
588
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
589 void handle_number (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
590
16253
a89cf57ba3a5 partial cleanup of continuation handling in lexer
John W. Eaton <jwe@octave.org>
parents: 16231
diff changeset
591 void handle_continuation (void);
a89cf57ba3a5 partial cleanup of continuation handling in lexer
John W. Eaton <jwe@octave.org>
parents: 16231
diff changeset
592
16337
6bfd8dbd7d3c don't swallow statements that follow comment lines (bug #38549)
John W. Eaton <jwe@octave.org>
parents: 16320
diff changeset
593 void finish_comment (octave_comment_elt::comment_type typ);
16253
a89cf57ba3a5 partial cleanup of continuation handling in lexer
John W. Eaton <jwe@octave.org>
parents: 16231
diff changeset
594
17693
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
595 octave_comment_list *get_comment (void) { return comment_buf.get_comment (); }
efbe746f8fa8 eliminate octave_comment_buffer singleton
John W. Eaton <jwe@octave.org>
parents: 16898
diff changeset
596
16259
0b5ab09dfce4 2/10 commits reworking the lexer
John W. Eaton <jwe@octave.org>
parents: 16257
diff changeset
597 int handle_close_bracket (int bracket_type);
16113
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John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
598
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
599 bool looks_like_command_arg (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
600
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
601 int handle_superclass_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
602
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
603 int handle_meta_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
604
18520
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
605 int handle_fq_identifier (void);
932aca9a7c57 Allow multi-level classdef package.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
606
16113
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John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
607 int handle_identifier (void);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
608
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
609 void maybe_warn_separator_insert (char sep);
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
610
21102
dfcb9d74b253 Rename local gripe_XXX functions to err_XXX or warn_XXX.
Rik <rik@octave.org>
parents: 21017
diff changeset
611 void warn_single_quote_string (void);
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
612
21102
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Rik <rik@octave.org>
parents: 21017
diff changeset
613 void warn_language_extension (const std::string& msg);
16113
7c5e5e97a3bc move static lexer helper functions to lexical_feedback class
John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
614
21102
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Rik <rik@octave.org>
parents: 21017
diff changeset
615 void maybe_warn_language_extension_comment (char c);
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John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
616
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Rik <rik@octave.org>
parents: 21017
diff changeset
617 void warn_language_extension_continuation (void);
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John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
618
21102
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Rik <rik@octave.org>
parents: 21017
diff changeset
619 void warn_language_extension_operator (const std::string& op);
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John W. Eaton <jwe@octave.org>
parents: 16111
diff changeset
620
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parents: 16125
diff changeset
621 void push_token (token *);
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parents: 16125
diff changeset
622
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parents: 16125
diff changeset
623 token *current_token (void);
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parents: 16125
diff changeset
624
16118
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parents: 16115
diff changeset
625 void display_token (int tok);
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John W. Eaton <jwe@octave.org>
parents: 16115
diff changeset
626
16129
053b0364b507 localize use of yy_fatal_error with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16128
diff changeset
627 void fatal_error (const char *msg);
053b0364b507 localize use of yy_fatal_error with lexical_feedback member function
John W. Eaton <jwe@octave.org>
parents: 16128
diff changeset
628
16229
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parents: 16228
diff changeset
629 void lexer_debug (const char *pattern);
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John W. Eaton <jwe@octave.org>
parents: 16115
diff changeset
630
16149
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John W. Eaton <jwe@octave.org>
parents: 16139
diff changeset
631 // Internal state of the flex-generated lexer.
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parents: 16139
diff changeset
632 void *scanner;
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parents: 16139
diff changeset
633
16183
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parents: 16164
diff changeset
634 // Object that reads and buffers input.
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parents: 16164
diff changeset
635 input_buffer input_buf;
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parents: 16164
diff changeset
636
17693
efbe746f8fa8 eliminate octave_comment_buffer singleton
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parents: 16898
diff changeset
637 // Object that collects comment text.
efbe746f8fa8 eliminate octave_comment_buffer singleton
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parents: 16898
diff changeset
638 comment_buffer comment_buf;
efbe746f8fa8 eliminate octave_comment_buffer singleton
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parents: 16898
diff changeset
639
16293
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parents: 16292
diff changeset
640 virtual void increment_promptflag (void) = 0;
16195
b52d2f9294b6 use class for reading lexer input
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parents: 16194
diff changeset
641
16293
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parents: 16292
diff changeset
642 virtual void decrement_promptflag (void) = 0;
16209
e7ff32e7cf82 move global promptflag variable to octave_reader class
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parents: 16207
diff changeset
643
16293
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parents: 16292
diff changeset
644 virtual int promptflag (void) const = 0;
16209
e7ff32e7cf82 move global promptflag variable to octave_reader class
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parents: 16207
diff changeset
645
16293
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parents: 16292
diff changeset
646 virtual int promptflag (int) = 0;
16195
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parents: 16194
diff changeset
647
16293
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parents: 16292
diff changeset
648 virtual std::string input_source (void) const { return "unknown"; }
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parents: 16292
diff changeset
649
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parents: 16292
diff changeset
650 virtual bool input_from_terminal (void) const { return false; }
16203
127cccb037bf move more global parser and lexer variables to classes
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parents: 16199
diff changeset
651
16293
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parents: 16292
diff changeset
652 virtual bool input_from_file (void) const { return false; }
16203
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parents: 16199
diff changeset
653
16293
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parents: 16292
diff changeset
654 virtual bool input_from_eval_string (void) const { return false; }
16195
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parents: 16194
diff changeset
655
16224
4a848eb52de2 use stack for tracking lexer start states
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parents: 16209
diff changeset
656 void push_start_state (int state);
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parents: 16209
diff changeset
657
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parents: 16209
diff changeset
658 void pop_start_state (void);
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parents: 16209
diff changeset
659
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parents: 16209
diff changeset
660 void clear_start_state (void);
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parents: 16209
diff changeset
661
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parents: 16209
diff changeset
662 int start_state (void) const { return start_state_stack.top (); }
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John W. Eaton <jwe@octave.org>
parents: 16209
diff changeset
663
4a848eb52de2 use stack for tracking lexer start states
John W. Eaton <jwe@octave.org>
parents: 16209
diff changeset
664 void display_start_state (void) const;
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John W. Eaton <jwe@octave.org>
parents: 16209
diff changeset
665
16275
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parents: 16267
diff changeset
666 int handle_op (const char *pattern, int tok, bool bos = false);
16229
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parents: 16228
diff changeset
667
19852
e9a0bd0b125c Rename 'matlab-incompatible' warning to 'language-extension'.
Carnë Draug <carandraug@octave.org>
parents: 19697
diff changeset
668 int handle_language_extension_op (const char *pattern, int tok,
e9a0bd0b125c Rename 'matlab-incompatible' warning to 'language-extension'.
Carnë Draug <carandraug@octave.org>
parents: 19697
diff changeset
669 bool bos = false);
16229
7b7b1e4968e8 use functions instead of token return macros in lexer
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parents: 16228
diff changeset
670
16263
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parents: 16259
diff changeset
671 bool maybe_unput_comma_before_unary_op (int tok);
9acb86e6ac90 4/10 commits reworking the lexer
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parents: 16259
diff changeset
672
16275
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parents: 16267
diff changeset
673 int handle_unary_op (int tok, bool bos = false);
16263
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John W. Eaton <jwe@octave.org>
parents: 16259
diff changeset
674
19852
e9a0bd0b125c Rename 'matlab-incompatible' warning to 'language-extension'.
Carnë Draug <carandraug@octave.org>
parents: 19697
diff changeset
675 int handle_language_extension_unary_op (int tok, bool bos = false);
16263
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parents: 16259
diff changeset
676
16257
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parents: 16255
diff changeset
677 int handle_assign_op (const char *pattern, int tok);
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parents: 16255
diff changeset
678
19852
e9a0bd0b125c Rename 'matlab-incompatible' warning to 'language-extension'.
Carnë Draug <carandraug@octave.org>
parents: 19697
diff changeset
679 int handle_language_extension_assign_op (const char *pattern, int tok);
16257
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parents: 16255
diff changeset
680
16275
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John W. Eaton <jwe@octave.org>
parents: 16267
diff changeset
681 int handle_op_internal (int tok, bool bos, bool compat);
16229
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John W. Eaton <jwe@octave.org>
parents: 16228
diff changeset
682
16231
2b15ae55c721 put all tokens in the token cache
John W. Eaton <jwe@octave.org>
parents: 16230
diff changeset
683 int handle_token (const std::string& name, int tok);
16229
7b7b1e4968e8 use functions instead of token return macros in lexer
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parents: 16228
diff changeset
684
16231
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John W. Eaton <jwe@octave.org>
parents: 16230
diff changeset
685 int handle_token (int tok, token *tok_val = 0);
16229
7b7b1e4968e8 use functions instead of token return macros in lexer
John W. Eaton <jwe@octave.org>
parents: 16228
diff changeset
686
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John W. Eaton <jwe@octave.org>
parents: 16228
diff changeset
687 int count_token (int tok);
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parents: 16228
diff changeset
688
16257
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parents: 16255
diff changeset
689 int count_token_internal (int tok);
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parents: 16255
diff changeset
690
16229
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John W. Eaton <jwe@octave.org>
parents: 16228
diff changeset
691 int show_token (int tok);
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John W. Eaton <jwe@octave.org>
parents: 16228
diff changeset
692
18520
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
693 void enable_fq_identifier (void);
932aca9a7c57 Allow multi-level classdef package.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 18227
diff changeset
694
16293
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parents: 16292
diff changeset
695 protected:
16126
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John W. Eaton <jwe@octave.org>
parents: 16125
diff changeset
696
16224
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John W. Eaton <jwe@octave.org>
parents: 16209
diff changeset
697 std::stack<int> start_state_stack;
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parents: 16209
diff changeset
698
16110
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John W. Eaton <jwe@octave.org>
parents: 16107
diff changeset
699 // No copying!
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John W. Eaton <jwe@octave.org>
parents: 16107
diff changeset
700
16293
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parents: 16292
diff changeset
701 octave_base_lexer (const octave_base_lexer&);
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parents: 16292
diff changeset
702
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parents: 16292
diff changeset
703 octave_base_lexer& operator = (const octave_base_lexer&);
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parents: 16292
diff changeset
704 };
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parents: 16292
diff changeset
705
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parents: 16292
diff changeset
706 class
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parents: 16292
diff changeset
707 octave_lexer : public octave_base_lexer
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parents: 16292
diff changeset
708 {
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parents: 16292
diff changeset
709 public:
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parents: 16292
diff changeset
710
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parents: 16292
diff changeset
711 octave_lexer (void)
17731
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parents: 17693
diff changeset
712 : octave_base_lexer (), input_reader (this)
16293
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parents: 16292
diff changeset
713 { }
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parents: 16292
diff changeset
714
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parents: 16292
diff changeset
715 octave_lexer (FILE *file)
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parents: 17693
diff changeset
716 : octave_base_lexer (), input_reader (file, this)
16293
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parents: 16292
diff changeset
717 { }
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parents: 16292
diff changeset
718
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parents: 16292
diff changeset
719 octave_lexer (const std::string& eval_string)
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parents: 17693
diff changeset
720 : octave_base_lexer (), input_reader (eval_string, this)
16293
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parents: 16292
diff changeset
721 { }
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parents: 16292
diff changeset
722
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parents: 16292
diff changeset
723 void reset (void)
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parents: 16292
diff changeset
724 {
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parents: 16292
diff changeset
725 input_reader.reset ();
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parents: 16292
diff changeset
726
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parents: 16292
diff changeset
727 octave_base_lexer::reset ();
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parents: 16292
diff changeset
728 }
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parents: 16292
diff changeset
729
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
730 void increment_promptflag (void) { input_reader.increment_promptflag (); }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
731
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
732 void decrement_promptflag (void) { input_reader.decrement_promptflag (); }
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
733
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
734 int promptflag (void) const { return input_reader.promptflag (); }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
735
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
736 int promptflag (int n) { return input_reader.promptflag (n); }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
737
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
738 std::string input_source (void) const
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
739 {
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
740 return input_reader.input_source ();
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
741 }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
742
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
743 bool input_from_terminal (void) const
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
744 {
17733
8ad59bef27b5 use more direct method for checking input source for lexer
John W. Eaton <jwe@octave.org>
parents: 17731
diff changeset
745 return input_reader.input_from_terminal ();
16293
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
746 }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
747
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
748 bool input_from_file (void) const
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
749 {
17733
8ad59bef27b5 use more direct method for checking input source for lexer
John W. Eaton <jwe@octave.org>
parents: 17731
diff changeset
750 return input_reader.input_from_file ();
16293
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
751 }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
752
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
753 bool input_from_eval_string (void) const
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
754 {
17733
8ad59bef27b5 use more direct method for checking input source for lexer
John W. Eaton <jwe@octave.org>
parents: 17731
diff changeset
755 return input_reader.input_from_eval_string ();
16293
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
756 }
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
757
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
758 int fill_flex_buffer (char *buf, unsigned int max_size);
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
759
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
760 octave_input_reader input_reader;
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
761
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
762 protected:
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
763
57e87ddfee14 create base class for lexer
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parents: 16292
diff changeset
764 // No copying!
57e87ddfee14 create base class for lexer
John W. Eaton <jwe@octave.org>
parents: 16292
diff changeset
765
16158
7eb614760ddb rename lexical_feedback to octave_lexer
John W. Eaton <jwe@octave.org>
parents: 16149
diff changeset
766 octave_lexer (const octave_lexer&);
16110
7302f8a4df83 use pointer for global lexical_feedback structure
John W. Eaton <jwe@octave.org>
parents: 16107
diff changeset
767
16158
7eb614760ddb rename lexical_feedback to octave_lexer
John W. Eaton <jwe@octave.org>
parents: 16149
diff changeset
768 octave_lexer& operator = (const octave_lexer&);
1826
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe]
jwe
parents: 1315
diff changeset
769 };
b14829582cc4 [project @ 1996-02-02 03:05:07 by jwe]
jwe
parents: 1315
diff changeset
770
16294
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
771 class
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
772 octave_push_lexer : public octave_base_lexer
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
773 {
0925d1f6875e push parser/lexer interface
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parents: 16293
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774 public:
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
775
21017
93748bcaec17 maint: Replace emtpy 'std::string ()' calls with "".
Rik <rik@octave.org>
parents: 20791
diff changeset
776 octave_push_lexer (const std::string& input = "",
16294
0925d1f6875e push parser/lexer interface
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diff changeset
777 bool eof = false)
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
778 : octave_base_lexer (), pflag (1)
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
779 {
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
780 append_input (input, eof);
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
781 }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
782
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
783 bool is_push_lexer (void) const { return true; }
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
784
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
785 void reset (void)
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
786 {
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
787 promptflag (1);
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
788
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
789 octave_base_lexer::reset ();
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
790 }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
791
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
792 void append_input (const std::string& input, bool eof)
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
793 {
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
794 input_buf.fill (input, eof);
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
795 }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
796
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
797 void increment_promptflag (void) { pflag++; }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
798
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
799 void decrement_promptflag (void) { pflag--; }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
800
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
801 int promptflag (void) const { return pflag; }
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
802
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
803 int promptflag (int n)
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
804 {
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
805 int retval = pflag;
0925d1f6875e push parser/lexer interface
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parents: 16293
diff changeset
806 pflag = n;
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
807 return retval;
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
808 }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
809
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
810 std::string input_source (void) const { return "push buffer"; }
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
811
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
812 int fill_flex_buffer (char *buf, unsigned int max_size);
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
813
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
814 protected:
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
815
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
816 int pflag;
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
817
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
818 // No copying!
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
819
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
820 octave_push_lexer (const octave_push_lexer&);
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
821
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
822 octave_push_lexer& operator = (const octave_push_lexer&);
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
823 };
0925d1f6875e push parser/lexer interface
John W. Eaton <jwe@octave.org>
parents: 16293
diff changeset
824
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
parents:
diff changeset
825 #endif