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annotate libinterp/parse-tree/token.h @ 16267:15f55df088e7

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6/10 commits reworking the lexer
author John W. Eaton <jwe@octave.org>
date Mon, 11 Mar 2013 14:30:57 -0400
parents db7f07b22b9b
children dbbef00202ff 11115c237231
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1 /*
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2
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3 Copyright (C) 1993-2012 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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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
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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
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21 */
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22
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23 #if !defined (octave_token_h)
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24 #define octave_token_h 1
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25
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26 #include <string>
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27
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28 #include "symtab.h"
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29
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30 class
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31 token
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32 {
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33 public:
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34
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35 enum token_type
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36 {
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37 generic_token,
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38 keyword_token,
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39 string_token,
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40 double_token,
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41 ettype_token,
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42 sym_rec_token,
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43 scls_rec_token,
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44 meta_rec_token
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45 };
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46
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47 enum end_tok_type
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48 {
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49 simple_end,
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50 classdef_end,
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51 enumeration_end,
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52 events_end,
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53 for_end,
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54 function_end,
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55 if_end,
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56 methods_end,
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57 parfor_end,
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58 properties_end,
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59 switch_end,
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60 while_end,
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61 try_catch_end,
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62 unwind_protect_end
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63 };
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64
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65 token (int tv, int l = -1, int c = -1);
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66 token (int tv, bool is_keyword, int l = -1, int c = -1);
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67 token (int tv, const std::string& s, int l = -1, int c = -1);
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68 token (int tv, double d, const std::string& s = std::string (),
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69 int l = -1, int c = -1);
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70 token (int tv, end_tok_type t, int l = -1, int c = -1);
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71 token (int tv, symbol_table::symbol_record *s, int l = -1, int c = -1);
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72 token (int tv, symbol_table::symbol_record *cls,
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73 symbol_table::symbol_record *pkg, int l = -1, int c = -1);
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74 token (int tv, symbol_table::symbol_record *mth,
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75 symbol_table::symbol_record *cls,
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76 symbol_table::symbol_record *pkg, int l = -1, int c = -1);
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77
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78 ~token (void);
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79
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80 void mark_may_be_command (void) { maybe_cmd = true; }
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81 bool may_be_command (void) const { return maybe_cmd; }
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82
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83 void mark_trailing_space (void) { tspc = true; }
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84 bool space_follows_token (void) const { return tspc; }
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85
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86 int token_value (void) const { return tok_val; }
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87 bool token_value_is (int tv) const { return tv == tok_val; }
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88
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89 int line (void) const { return line_num; }
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90 int column (void) const { return column_num; }
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91
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92 bool is_keyword (void) const
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93 {
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94 return type_tag == keyword_token || type_tag == ettype_token;
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95 }
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96
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97 std::string text (void) const;
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98 double number (void) const;
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99 token_type ttype (void) const;
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100 end_tok_type ettype (void) const;
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101 symbol_table::symbol_record *sym_rec (void);
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102
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103 symbol_table::symbol_record *method_rec (void);
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104 symbol_table::symbol_record *class_rec (void);
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105 symbol_table::symbol_record *package_rec (void);
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106
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107 symbol_table::symbol_record *meta_class_rec (void);
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108 symbol_table::symbol_record *meta_package_rec (void);
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109
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110 std::string text_rep (void);
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111
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112 private:
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113
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114 // No copying!
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115
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116 token (const token& tok);
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117
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118 token& operator = (const token& tok);
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119
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120 bool maybe_cmd;
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121 bool tspc;
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122 int line_num;
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123 int column_num;
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124 int tok_val;
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125 token_type type_tag;
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126 union
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127 {
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128 std::string *str;
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129 double num;
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130 end_tok_type et;
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131 symbol_table::symbol_record *sr;
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132 struct
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133 {
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134 symbol_table::symbol_record *mr;
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135 symbol_table::symbol_record *cr;
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136 symbol_table::symbol_record *pr;
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137 } sc;
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138 struct
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139 {
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140 symbol_table::symbol_record *cr;
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141 symbol_table::symbol_record *pr;
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142 } mc;
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143 };
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144 std::string orig_text;
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145 };
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146
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147 #endif