mirror of
https://github.com/JakeHillion/object-introspection.git
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100 lines
2.7 KiB
Plaintext
100 lines
2.7 KiB
Plaintext
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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%{
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/* C++ string header, for string ops below */
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#include <string>
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/* Implementation of yyFlexScanner */
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#include "oi/OILexer.h"
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#undef YY_DECL
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#define YY_DECL \
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int oi::detail::OIScanner::yylex(oi::detail::OIParser::semantic_type * const lval, \
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oi::detail::OIParser::location_type *loc )
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/* typedef to make the returns for the tokens shorter */
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using token = oi::detail::OIParser::token;
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/* update location on matching */
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#define YY_USER_ACTION loc->step(); loc->columns(yyleng);
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%}
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%option debug
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%option nodefault
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%option yyclass="oi::detail::OIScanner"
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%option noyywrap
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%option c++
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%x COMMENT
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%%
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%{ /** Code executed at the beginning of yylex **/
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yylval = lval;
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%}
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(arg[0-9]|retval|this) {
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yylval->emplace<std::list<std::string>>(std::list<std::string>{yytext});
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return( token::OI_ARG );
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}
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/*
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* We very much rely on the fact that the probetype rule sits before the
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* function matching rule below as they'll both match. In that case lex will
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* return the first.
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*/
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(return|entry|global) {
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yylval->emplace<std::string>(yytext);
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return( token::OI_PROBETYPE );
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}
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/* oid uses mangled symbols to specify the function */
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[a-zA-Z_0-9.$]+ {
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yylval->emplace<std::string>(yytext);
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return( token::OI_FUNC );
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}
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":" {
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yylval->emplace<char>(yytext[0]);
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return (token::OI_COLON);
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}
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<*>\n {
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// Update line number
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loc->lines();
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}
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, {
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yylval->emplace<char>(yytext[0]);
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return(token::OI_COMMA);
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}
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"//"[^\n]* /* skip one-line comments */
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"/*" BEGIN(COMMENT); /* skip multi-lines comments */
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<COMMENT>[^*\n]* /* skip comment's content */
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<COMMENT>"*"+[^*/\n]* /* skip '*' */
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<COMMENT>"*"+"/" BEGIN(INITIAL);
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[ \t]+ /* skip whitespace */
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<<EOF>> {
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if (YYSTATE == COMMENT) {
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throw oi::detail::OIParser::syntax_error(
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*loc, "unterminated /* comment");
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} else {
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return( token::OI_EOF );
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}
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}
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%%
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