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80 lines
2.9 KiB
80 lines
2.9 KiB
%{
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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/* IWYU pragma: no_forward_declare yyguts_t */
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#ifndef __clang_analyzer__ /* Suppress clang-analyzer warnings */
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#include <cmGccDepfileLexerHelper.h>
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#include <string>
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%}
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%option prefix="cmGccDepfile_yy"
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%option noyywrap
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%option reentrant
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%pointer
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WSPACE [ \t]
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NEWLINE \r?\n
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%%
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\${2} {
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// Unescape the dollar sign.
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yyextra->addToCurrentPath("$");
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}
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\\# {
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// Unescape the hash.
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yyextra->addToCurrentPath("#");
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}
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(\\\\)*\\[ ] {
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// 2N+1 backslashes plus space -> N backslashes plus space.
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size_t c = (strlen(yytext) - 1) / 2;
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std::string s(c, '\\');
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s.push_back(' ');
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yyextra->addToCurrentPath(s.c_str());
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}
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(\\\\)+[ ] {
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// 2N backslashes plus space -> 2N backslashes, end of filename.
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yytext[strlen(yytext) - 1] = 0;
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yyextra->addToCurrentPath(yytext);
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yyextra->newDependency();
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}
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{WSPACE}*\\{NEWLINE} {
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// A line continuation ends the current file name.
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yyextra->newRuleOrDependency();
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}
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{NEWLINE} {
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// A newline ends the current file name and the current rule.
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yyextra->newEntry();
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}
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:{NEWLINE} {
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// A colon ends the rules
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yyextra->newDependency();
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// A newline after colon terminates current rule.
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yyextra->newEntry();
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}
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:({WSPACE}+|\\{NEWLINE}) {
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// A colon followed by space or line continuation ends the rules
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// and starts a new dependency.
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yyextra->newDependency();
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}
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{WSPACE}+ {
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// Rules and dependencies are separated by blocks of whitespace.
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yyextra->newRuleOrDependency();
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}
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[a-zA-Z0-9+,/_.~()}{%=@\x5B\x5D!\x80-\xFF-]+ {
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// Got a span of plain text.
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yyextra->addToCurrentPath(yytext);
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}
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. {
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// Got an otherwise unmatched character.
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yyextra->addToCurrentPath(yytext);
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}
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%%
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/*--------------------------------------------------------------------------*/
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#endif /* __clang_analyzer__ */
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