1 | # C++ skeleton for Bison
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2 |
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3 | # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
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4 | # Inc.
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5 |
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6 | # This program is free software: you can redistribute it and/or modify
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7 | # it under the terms of the GNU General Public License as published by
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8 | # the Free Software Foundation, either version 3 of the License, or
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9 | # (at your option) any later version.
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10 | #
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11 | # This program is distributed in the hope that it will be useful,
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12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | # GNU General Public License for more details.
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15 | #
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16 | # You should have received a copy of the GNU General Public License
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17 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 |
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19 | # We do want M4 expansion after # for CPP macros.
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20 | m4_changecom()
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21 | m4_divert_push(0)dnl
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22 | @output(b4_dir_prefix[]position.hh@)
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23 | b4_copyright([Positions for Bison parsers in C++],
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24 | [2002, 2003, 2004, 2005, 2006])[
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25 |
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26 | /**
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27 | ** \file position.hh
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28 | ** Define the ]b4_namespace_ref[::position class.
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29 | */
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30 |
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31 | #ifndef BISON_POSITION_HH
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32 | # define BISON_POSITION_HH
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33 |
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34 | # include <iostream>
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35 | # include <string>
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36 | # include <algorithm>
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37 |
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38 | ]b4_namespace_open[
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39 | /// Abstract a position.
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40 | class position
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41 | {
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42 | public:
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43 | ]m4_ifdef([b4_location_constructors], [
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44 | /// Construct a position.
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45 | position ()
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46 | : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
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47 | {
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48 | }
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49 |
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50 | ])[
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51 | /// Initialization.
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52 | inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
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53 | {
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54 | filename = fn;
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55 | line = ]b4_location_initial_line[;
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56 | column = ]b4_location_initial_column[;
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57 | }
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58 |
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59 | /** \name Line and Column related manipulators
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60 | ** \{ */
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61 | public:
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62 | /// (line related) Advance to the COUNT next lines.
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63 | inline void lines (int count = 1)
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64 | {
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65 | column = ]b4_location_initial_column[;
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66 | line += count;
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67 | }
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68 |
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69 | /// (column related) Advance to the COUNT next columns.
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70 | inline void columns (int count = 1)
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71 | {
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72 | column = std::max (]b4_location_initial_column[u, column + count);
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73 | }
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74 | /** \} */
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75 |
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76 | public:
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77 | /// File name to which this position refers.
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78 | ]b4_percent_define_get([[filename_type]])[* filename;
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79 | /// Current line number.
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80 | unsigned int line;
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81 | /// Current column number.
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82 | unsigned int column;
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83 | };
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84 |
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85 | /// Add and assign a position.
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86 | inline const position&
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87 | operator+= (position& res, const int width)
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88 | {
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89 | res.columns (width);
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90 | return res;
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91 | }
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92 |
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93 | /// Add two position objects.
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94 | inline const position
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95 | operator+ (const position& begin, const int width)
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96 | {
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97 | position res = begin;
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98 | return res += width;
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99 | }
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100 |
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101 | /// Add and assign a position.
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102 | inline const position&
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103 | operator-= (position& res, const int width)
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104 | {
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105 | return res += -width;
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106 | }
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107 |
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108 | /// Add two position objects.
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109 | inline const position
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110 | operator- (const position& begin, const int width)
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111 | {
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112 | return begin + -width;
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113 | }
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114 | ]b4_percent_define_flag_if([[define_location_comparison]], [[
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115 | /// Compare two position objects.
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116 | inline bool
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117 | operator== (const position& pos1, const position& pos2)
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118 | {
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119 | return
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120 | (pos1.filename == pos2.filename
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121 | || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename)
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122 | && pos1.line == pos2.line && pos1.column == pos2.column;
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123 | }
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124 |
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125 | /// Compare two position objects.
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126 | inline bool
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127 | operator!= (const position& pos1, const position& pos2)
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128 | {
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129 | return !(pos1 == pos2);
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130 | }
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131 | ]])[
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132 | /** \brief Intercept output stream redirection.
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133 | ** \param ostr the destination output stream
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134 | ** \param pos a reference to the position to redirect
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135 | */
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136 | inline std::ostream&
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137 | operator<< (std::ostream& ostr, const position& pos)
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138 | {
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139 | if (pos.filename)
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140 | ostr << *pos.filename << ':';
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141 | return ostr << pos.line << '.' << pos.column;
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142 | }
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143 |
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144 | ]b4_namespace_close[
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145 | #endif // not BISON_POSITION_HH]
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146 | @output(b4_dir_prefix[]location.hh@)
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147 | b4_copyright([Locations for Bison parsers in C++],
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148 | [2002, 2003, 2004, 2005, 2006])[
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149 |
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150 | /**
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151 | ** \file location.hh
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152 | ** Define the ]b4_namespace_ref[::location class.
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153 | */
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154 |
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155 | #ifndef BISON_LOCATION_HH
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156 | # define BISON_LOCATION_HH
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157 |
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158 | # include <iostream>
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159 | # include <string>
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160 | # include "position.hh"
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161 |
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162 | ]b4_namespace_open[
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163 |
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164 | /// Abstract a location.
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165 | class location
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166 | {
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167 | public:
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168 | ]m4_ifdef([b4_location_constructors], [
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169 | /// Construct a location.
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170 | location ()
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171 | : begin (), end ()
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172 | {
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173 | }
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174 |
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175 | ])[
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176 | /// Initialization.
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177 | inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
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178 | {
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179 | begin.initialize (fn);
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180 | end = begin;
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181 | }
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182 |
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183 | /** \name Line and Column related manipulators
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184 | ** \{ */
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185 | public:
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186 | /// Reset initial location to final location.
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187 | inline void step ()
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188 | {
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189 | begin = end;
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190 | }
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191 |
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192 | /// Extend the current location to the COUNT next columns.
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193 | inline void columns (unsigned int count = 1)
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194 | {
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195 | end += count;
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196 | }
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197 |
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198 | /// Extend the current location to the COUNT next lines.
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199 | inline void lines (unsigned int count = 1)
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200 | {
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201 | end.lines (count);
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202 | }
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203 | /** \} */
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204 |
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205 |
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206 | public:
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207 | /// Beginning of the located region.
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208 | position begin;
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209 | /// End of the located region.
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210 | position end;
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211 | };
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212 |
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213 | /// Join two location objects to create a location.
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214 | inline const location operator+ (const location& begin, const location& end)
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215 | {
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216 | location res = begin;
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217 | res.end = end.end;
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218 | return res;
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219 | }
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220 |
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221 | /// Add two location objects.
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222 | inline const location operator+ (const location& begin, unsigned int width)
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223 | {
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224 | location res = begin;
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225 | res.columns (width);
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226 | return res;
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227 | }
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228 |
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229 | /// Add and assign a location.
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230 | inline location& operator+= (location& res, unsigned int width)
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231 | {
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232 | res.columns (width);
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233 | return res;
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234 | }
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235 | ]b4_percent_define_flag_if([[define_location_comparison]], [[
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236 | /// Compare two location objects.
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237 | inline bool
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238 | operator== (const location& loc1, const location& loc2)
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239 | {
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240 | return loc1.begin == loc2.begin && loc1.end == loc2.end;
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241 | }
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242 |
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243 | /// Compare two location objects.
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244 | inline bool
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245 | operator!= (const location& loc1, const location& loc2)
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246 | {
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247 | return !(loc1 == loc2);
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248 | }
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249 | ]])[
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250 | /** \brief Intercept output stream redirection.
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251 | ** \param ostr the destination output stream
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252 | ** \param loc a reference to the location to redirect
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253 | **
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254 | ** Avoid duplicate information.
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255 | */
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256 | inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
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257 | {
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258 | position last = loc.end - 1;
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259 | ostr << loc.begin;
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260 | if (last.filename
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261 | && (!loc.begin.filename
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262 | || *loc.begin.filename != *last.filename))
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263 | ostr << '-' << last;
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264 | else if (loc.begin.line != last.line)
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265 | ostr << '-' << last.line << '.' << last.column;
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266 | else if (loc.begin.column != last.column)
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267 | ostr << '-' << last.column;
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268 | return ostr;
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269 | }
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270 |
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271 | ]b4_namespace_close[
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272 |
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273 | #endif // not BISON_LOCATION_HH]
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274 | m4_divert_pop(0)
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275 | m4_changecom([#])
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