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annotate libinterp/parse-tree/token.h @ 29359:7854d5752dd2

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maint: merge stable to default.
author John W. Eaton <jwe@octave.org>
date Wed, 10 Feb 2021 10:10:40 -0500
parents dc8de424fc72 0a5b15007766
children 6858992dfadf
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2021 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_token_h)
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27 #define octave_token_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <string>
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32
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33 #include "filepos.h"
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34 #include "ov.h"
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35 #include "symrec.h"
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36
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37 namespace octave
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38 {
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39 class token
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40 {
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41 public:
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42
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43 enum token_type
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44 {
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45 generic_token,
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46 keyword_token,
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47 string_token,
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48 numeric_token,
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49 ettype_token,
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50 sym_rec_token,
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51 scls_name_token,
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52 };
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53
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54 enum end_tok_type
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55 {
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56 simple_end,
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57 classdef_end,
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58 enumeration_end,
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59 events_end,
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60 for_end,
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61 function_end,
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62 if_end,
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63 methods_end,
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64 parfor_end,
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65 properties_end,
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66 switch_end,
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67 try_catch_end,
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68 unwind_protect_end,
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69 spmd_end,
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70 while_end,
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71 };
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72
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73 token (int tv, const filepos& beg_pos, const filepos& end_pos);
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74
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75 token (int tv, bool is_keyword, const filepos& beg_pos
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76 , const filepos& end_pos);
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77
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78 token (int tv, const char *s, const filepos& beg_pos,
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79 const filepos& end_pos);
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80
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81 token (int tv, const std::string& s, const filepos& beg_pos,
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82 const filepos& end_pos);
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83
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84 token (int tv, const octave_value& val, const std::string& s,
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85 const filepos& beg_pos, const filepos& end_pos);
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86
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87 token (int tv, end_tok_type t, const filepos& beg_pos,
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88 const filepos& end_pos);
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89
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90 token (int tv, const symbol_record& s, const filepos& beg_pos,
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91 const filepos& end_pos);
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92
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93 token (int tv, const std::string& mth, const std::string& cls,
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94 const filepos& beg_pos, const filepos& end_pos);
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95
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96 // No copying!
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97
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98 token (const token&) = delete;
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99
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100 token& operator = (const token&) = delete;
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101
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102 ~token (void);
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103
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104 void mark_may_be_command (void) { m_maybe_cmd = true; }
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105 bool may_be_command (void) const { return m_maybe_cmd; }
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106
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107 void mark_trailing_space (void) { m_tspc = true; }
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108 bool space_follows_token (void) const { return m_tspc; }
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109
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110 int token_value (void) const { return m_tok_val; }
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111 bool token_value_is (int tv) const { return tv == m_tok_val; }
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112
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113 filepos beg_pos (void) const { return m_beg_pos; }
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114 filepos end_pos (void) const { return m_end_pos; }
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115
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116 void beg_pos (const filepos& pos) { m_beg_pos = pos; }
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117 void end_pos (const filepos& pos) { m_end_pos = pos; }
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118
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119 // These will probably be removed.
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120 int line (void) const { return m_beg_pos.line (); }
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121 int column (void) const { return m_beg_pos.column (); }
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122
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123 bool iskeyword (void) const
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124 {
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125 return m_type_tag == keyword_token || m_type_tag == ettype_token;
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126 }
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127
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128 bool is_symbol (void) const
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129 {
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130 return m_type_tag == sym_rec_token;
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131 }
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132
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133 std::string text (void) const;
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134 std::string symbol_name (void) const;
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135 octave_value number (void) const;
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136 token_type ttype (void) const;
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137 end_tok_type ettype (void) const;
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138 symbol_record sym_rec (void) const;
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139
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140 std::string superclass_method_name (void) const;
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141 std::string superclass_class_name (void) const;
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143 std::string text_rep (void) const;
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144
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145 private:
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146
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147 bool m_maybe_cmd;
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148
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149 bool m_tspc;
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150
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151 filepos m_beg_pos;
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152 filepos m_end_pos;
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153
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154 int m_tok_val;
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155
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156 token_type m_type_tag;
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157
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158 union tok_info
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159 {
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160 tok_info (void) { }
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161
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162 tok_info (const char *s) : m_str (new std::string (s)) { }
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163
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164 tok_info (const std::string& str) : m_str (new std::string (str)) { }
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165
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166 tok_info (const octave_value& num) : m_num (new octave_value (num)) { }
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167
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168 tok_info (end_tok_type et) : m_et (et) { }
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169
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170 tok_info (const symbol_record& sr)
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171 : m_sr (new symbol_record (sr))
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172 { }
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173
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174 tok_info (const std::string& meth, const std::string& cls)
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175 : m_superclass_info (new superclass_info (meth, cls))
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176 { }
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177
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178 tok_info (const tok_info&) = delete;
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179
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180 tok_info& operator = (const tok_info&) = delete;
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181
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182 ~tok_info (void) { }
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183
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184 std::string *m_str;
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185
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186 octave_value *m_num;
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187
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188 end_tok_type m_et;
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189
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190 symbol_record *m_sr;
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191
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192 struct superclass_info
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193 {
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194 superclass_info (void) = delete;
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195
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196 superclass_info (const std::string& meth,
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197 const std::string& cls)
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198 : m_method_name (meth), m_class_name (cls)
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199 { }
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200
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201 superclass_info (const superclass_info&) = delete;
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202
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203 superclass_info& operator = (const superclass_info&) = delete;
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204
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205 ~superclass_info (void) = default;
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206
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207 // The name of the method to call. This is the text before the
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208 // "@" and may be of the form "object.method".
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209 std::string m_method_name;
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210
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211 // The name of the superclass. This is the text after the "@"
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212 // and may be of the form "object.method".
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213 std::string m_class_name;
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214 };
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215
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216 superclass_info *m_superclass_info;
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217 };
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218
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219 tok_info m_tok_info;
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220
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221 std::string m_orig_text;
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222 };
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223 }
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224
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225 #endif