annotate gcc/diagnostic.h @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
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1 /* Various declarations for language-independent diagnostics subroutines.
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2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
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3 Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 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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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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21 #ifndef GCC_DIAGNOSTIC_H
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22 #define GCC_DIAGNOSTIC_H
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24 #include "pretty-print.h"
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25 #include "diagnostic-core.h"
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27 /* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
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28 its context and its KIND (ice, error, warning, note, ...) See complete
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29 list in diagnostic.def. */
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30 struct diagnostic_info
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31 {
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32 /* Text to be formatted. */
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33 text_info message;
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34
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35 /* The location at which the diagnostic is to be reported. */
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36 rich_location *richloc;
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37
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38 /* Auxiliary data for client. */
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39 void *x_data;
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40 /* The kind of diagnostic it is about. */
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41 diagnostic_t kind;
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42 /* Which OPT_* directly controls this diagnostic. */
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43 int option_index;
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44 };
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46 /* Each time a diagnostic's classification is changed with a pragma,
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47 we record the change and the location of the change in an array of
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48 these structs. */
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49 struct diagnostic_classification_change_t
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50 {
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51 location_t location;
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52 int option;
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53 diagnostic_t kind;
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54 };
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56 /* Forward declarations. */
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57 typedef void (*diagnostic_starter_fn) (diagnostic_context *,
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58 diagnostic_info *);
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60 typedef void (*diagnostic_start_span_fn) (diagnostic_context *,
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61 expanded_location);
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62
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63 typedef diagnostic_starter_fn diagnostic_finalizer_fn;
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64
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65 class edit_context;
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66
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67 /* This data structure bundles altogether any information relevant to
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68 the context of a diagnostic message. */
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69 struct diagnostic_context
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70 {
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71 /* Where most of the diagnostic formatting work is done. */
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72 pretty_printer *printer;
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73
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74 /* The number of times we have issued diagnostics. */
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75 int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
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76
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77 /* True if it has been requested that warnings be treated as errors. */
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78 bool warning_as_error_requested;
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79
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80 /* The number of option indexes that can be passed to warning() et
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81 al. */
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82 int n_opts;
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84 /* For each option index that can be passed to warning() et al
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85 (OPT_* from options.h when using this code with the core GCC
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86 options), this array may contain a new kind that the diagnostic
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87 should be changed to before reporting, or DK_UNSPECIFIED to leave
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88 it as the reported kind, or DK_IGNORED to not report it at
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89 all. */
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90 diagnostic_t *classify_diagnostic;
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92 /* History of all changes to the classifications above. This list
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93 is stored in location-order, so we can search it, either
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94 binary-wise or end-to-front, to find the most recent
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95 classification for a given diagnostic, given the location of the
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96 diagnostic. */
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97 diagnostic_classification_change_t *classification_history;
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99 /* The size of the above array. */
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100 int n_classification_history;
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101
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102 /* For pragma push/pop. */
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103 int *push_list;
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104 int n_push;
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105
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106 /* True if we should print the source line with a caret indicating
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107 the location. */
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108 bool show_caret;
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109
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110 /* Maximum width of the source line printed. */
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111 int caret_max_width;
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112
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113 /* Character used for caret diagnostics. */
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114 char caret_chars[rich_location::STATICALLY_ALLOCATED_RANGES];
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115
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116 /* True if we should print the command line option which controls
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117 each diagnostic, if known. */
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118 bool show_option_requested;
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119
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120 /* True if we should raise a SIGABRT on errors. */
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121 bool abort_on_error;
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122
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123 /* True if we should show the column number on diagnostics. */
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124 bool show_column;
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125
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126 /* True if pedwarns are errors. */
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127 bool pedantic_errors;
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128
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129 /* True if permerrors are warnings. */
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130 bool permissive;
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131
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132 /* The index of the option to associate with turning permerrors into
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133 warnings. */
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134 int opt_permissive;
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135
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136 /* True if errors are fatal. */
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137 bool fatal_errors;
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138
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139 /* True if all warnings should be disabled. */
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140 bool dc_inhibit_warnings;
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141
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142 /* True if warnings should be given in system headers. */
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143 bool dc_warn_system_headers;
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144
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145 /* Maximum number of errors to report. */
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146 int max_errors;
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147
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148 /* This function is called before any message is printed out. It is
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149 responsible for preparing message prefix and such. For example, it
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150 might say:
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151 In file included from "/usr/local/include/curses.h:5:
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152 from "/home/gdr/src/nifty_printer.h:56:
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153 ...
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154 */
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155 diagnostic_starter_fn begin_diagnostic;
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156
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157 /* This function is called by diagnostic_show_locus in between
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158 disjoint spans of source code, so that the context can print
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159 something to indicate that a new span of source code has begun. */
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160 diagnostic_start_span_fn start_span;
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161
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162 /* This function is called after the diagnostic message is printed. */
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163 diagnostic_finalizer_fn end_diagnostic;
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164
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165 /* Client hook to report an internal error. */
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166 void (*internal_error) (diagnostic_context *, const char *, va_list *);
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167
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168 /* Client hook to say whether the option controlling a diagnostic is
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169 enabled. Returns nonzero if enabled, zero if disabled. */
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170 int (*option_enabled) (int, void *);
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171
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172 /* Client information to pass as second argument to
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173 option_enabled. */
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174 void *option_state;
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175
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176 /* Client hook to return the name of an option that controls a
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177 diagnostic. Returns malloced memory. The first diagnostic_t
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178 argument is the kind of diagnostic before any reclassification
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179 (of warnings as errors, etc.); the second is the kind after any
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180 reclassification. May return NULL if no name is to be printed.
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181 May be passed 0 as well as the index of a particular option. */
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182 char *(*option_name) (diagnostic_context *, int, diagnostic_t, diagnostic_t);
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183
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184 /* Auxiliary data for client. */
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185 void *x_data;
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186
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187 /* Used to detect that the last caret was printed at the same location. */
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188 location_t last_location;
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189
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190 /* Used to detect when the input file stack has changed since last
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191 described. */
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192 const line_map_ordinary *last_module;
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193
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194 int lock;
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195
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196 bool inhibit_notes_p;
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197
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198 /* When printing source code, should the characters at carets and ranges
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199 be colorized? (assuming colorization is on at all).
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200 This should be true for frontends that generate range information
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201 (so that the ranges of code are colorized),
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202 and false for frontends that merely specify points within the
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203 source code (to avoid e.g. colorizing just the first character in
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204 a token, which would look strange). */
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205 bool colorize_source_p;
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206
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207 /* Usable by plugins; if true, print a debugging ruler above the
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208 source output. */
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209 bool show_ruler_p;
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210
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211 /* If true, print fixits in machine-parseable form after the
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212 rest of the diagnostic. */
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213 bool parseable_fixits_p;
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214
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215 /* If non-NULL, an edit_context to which fix-it hints should be
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216 applied, for generating patches. */
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217 edit_context *edit_context_ptr;
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218 };
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219
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220 static inline void
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221 diagnostic_inhibit_notes (diagnostic_context * context)
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222 {
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223 context->inhibit_notes_p = true;
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224 }
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225
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226
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227 /* Client supplied function to announce a diagnostic. */
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228 #define diagnostic_starter(DC) (DC)->begin_diagnostic
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229
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230 /* Client supplied function called after a diagnostic message is
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231 displayed. */
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232 #define diagnostic_finalizer(DC) (DC)->end_diagnostic
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233
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234 /* Extension hooks for client. */
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235 #define diagnostic_context_auxiliary_data(DC) (DC)->x_data
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236 #define diagnostic_info_auxiliary_data(DI) (DI)->x_data
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237
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238 /* Same as pp_format_decoder. Works on 'diagnostic_context *'. */
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239 #define diagnostic_format_decoder(DC) ((DC)->printer->format_decoder)
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240
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241 /* Same as output_prefixing_rule. Works on 'diagnostic_context *'. */
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242 #define diagnostic_prefixing_rule(DC) ((DC)->printer->wrapping.rule)
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243
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244 /* Raise SIGABRT on any diagnostic of severity DK_ERROR or higher. */
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245 #define diagnostic_abort_on_error(DC) \
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246 (DC)->abort_on_error = true
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247
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248 /* This diagnostic_context is used by front-ends that directly output
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249 diagnostic messages without going through `error', `warning',
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250 and similar functions. */
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251 extern diagnostic_context *global_dc;
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252
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253 /* The total count of a KIND of diagnostics emitted so far. */
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254 #define diagnostic_kind_count(DC, DK) (DC)->diagnostic_count[(int) (DK)]
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255
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256 /* The number of errors that have been issued so far. Ideally, these
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257 would take a diagnostic_context as an argument. */
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258 #define errorcount diagnostic_kind_count (global_dc, DK_ERROR)
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259 /* Similarly, but for warnings. */
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260 #define warningcount diagnostic_kind_count (global_dc, DK_WARNING)
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261 /* Similarly, but for warnings promoted to errors. */
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262 #define werrorcount diagnostic_kind_count (global_dc, DK_WERROR)
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263 /* Similarly, but for sorrys. */
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264 #define sorrycount diagnostic_kind_count (global_dc, DK_SORRY)
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265
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266 /* Returns nonzero if warnings should be emitted. */
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267 #define diagnostic_report_warnings_p(DC, LOC) \
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268 (!(DC)->dc_inhibit_warnings \
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269 && !(in_system_header_at (LOC) && !(DC)->dc_warn_system_headers))
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270
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271 /* Override the option index to be used for reporting a
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272 diagnostic. */
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273
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274 static inline void
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275 diagnostic_override_option_index (diagnostic_info *info, int optidx)
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276 {
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277 info->option_index = optidx;
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278 }
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279
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280 /* Diagnostic related functions. */
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281 extern void diagnostic_initialize (diagnostic_context *, int);
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282 extern void diagnostic_color_init (diagnostic_context *, int value = -1);
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283 extern void diagnostic_finish (diagnostic_context *);
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284 extern void diagnostic_report_current_module (diagnostic_context *, location_t);
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285 extern void diagnostic_show_locus (diagnostic_context *,
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286 rich_location *richloc,
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287 diagnostic_t diagnostic_kind);
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288
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289 /* Force diagnostics controlled by OPTIDX to be kind KIND. */
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290 extern diagnostic_t diagnostic_classify_diagnostic (diagnostic_context *,
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291 int /* optidx */,
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292 diagnostic_t /* kind */,
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293 location_t);
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294 extern void diagnostic_push_diagnostics (diagnostic_context *, location_t);
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295 extern void diagnostic_pop_diagnostics (diagnostic_context *, location_t);
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296 extern bool diagnostic_report_diagnostic (diagnostic_context *,
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297 diagnostic_info *);
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298 #ifdef ATTRIBUTE_GCC_DIAG
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299 extern void diagnostic_set_info (diagnostic_info *, const char *, va_list *,
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300 rich_location *, diagnostic_t) ATTRIBUTE_GCC_DIAG(2,0);
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301 extern void diagnostic_set_info_translated (diagnostic_info *, const char *,
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302 va_list *, rich_location *,
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303 diagnostic_t)
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304 ATTRIBUTE_GCC_DIAG(2,0);
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305 extern void diagnostic_append_note (diagnostic_context *, location_t,
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306 const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
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307 #endif
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308 extern char *diagnostic_build_prefix (diagnostic_context *, const diagnostic_info *);
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309 void default_diagnostic_starter (diagnostic_context *, diagnostic_info *);
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310 void default_diagnostic_start_span_fn (diagnostic_context *,
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311 expanded_location);
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312 void default_diagnostic_finalizer (diagnostic_context *, diagnostic_info *);
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313 void diagnostic_set_caret_max_width (diagnostic_context *context, int value);
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314 void diagnostic_action_after_output (diagnostic_context *, diagnostic_t);
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315 void diagnostic_check_max_errors (diagnostic_context *, bool flush = false);
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316
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317 void diagnostic_file_cache_fini (void);
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318
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319 int get_terminal_width (void);
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320
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321 /* Return the location associated to this diagnostic. Parameter WHICH
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322 specifies which location. By default, expand the first one. */
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323
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324 static inline location_t
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325 diagnostic_location (const diagnostic_info * diagnostic, int which = 0)
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326 {
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327 return diagnostic->message.get_location (which);
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328 }
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329
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330 /* Return the number of locations to be printed in DIAGNOSTIC. */
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331
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332 static inline unsigned int
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333 diagnostic_num_locations (const diagnostic_info * diagnostic)
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334 {
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335 return diagnostic->message.m_richloc->get_num_locations ();
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336 }
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337
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338 /* Expand the location of this diagnostic. Use this function for
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339 consistency. Parameter WHICH specifies which location. By default,
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340 expand the first one. */
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341
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342 static inline expanded_location
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343 diagnostic_expand_location (const diagnostic_info * diagnostic, int which = 0)
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344 {
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345 return diagnostic->richloc->get_expanded_location (which);
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346 }
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347
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348 /* This is somehow the right-side margin of a caret line, that is, we
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349 print at least these many characters after the position pointed at
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350 by the caret. */
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351 const int CARET_LINE_MARGIN = 10;
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352
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353 /* Return true if the two locations can be represented within the same
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354 caret line. This is used to build a prefix and also to determine
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355 whether to print one or two caret lines. */
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356
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357 static inline bool
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358 diagnostic_same_line (const diagnostic_context *context,
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359 expanded_location s1, expanded_location s2)
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360 {
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361 return s2.column && s1.line == s2.line
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362 && context->caret_max_width - CARET_LINE_MARGIN > abs (s1.column - s2.column);
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363 }
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364
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365 extern const char *diagnostic_get_color_for_kind (diagnostic_t kind);
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366
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367 /* Pure text formatting support functions. */
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368 extern char *file_name_as_prefix (diagnostic_context *, const char *);
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369
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370 extern char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
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371
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372
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373 #endif /* ! GCC_DIAGNOSTIC_H */