c807f2514e
Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech> Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/10
90 lines
1.9 KiB
Plaintext
90 lines
1.9 KiB
Plaintext
/*
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* This file is part of flex.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE.
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*/
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%option C++ noyywrap
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%{
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int mylineno = 0;
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%}
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string \"[^\n"]+\"
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ws [ \t]+
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alpha [A-Za-z]
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dig [0-9]
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name ({alpha}|{dig}|\$)({alpha}|{dig}|\_|\.|\-|\/|\$)*
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num1 [-+]?{dig}+\.?([eE][-+]?{dig}+)?
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num2 [-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)?
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number {num1}|{num2}
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%%
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{ws} /* skip blanks and tabs */
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"/*" {
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int c;
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while((c = yyinput()) != 0)
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{
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if(c == '\n')
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++mylineno;
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else if(c == '*')
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{
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if((c = yyinput()) == '/')
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break;
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else
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unput(c);
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}
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}
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}
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{number} std::cout << "number " << YYText() << '\n';
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\n mylineno++;
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{name} std::cout << "name " << YYText() << '\n';
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{string} std::cout << "string " << YYText() << '\n';
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%%
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extern "C" {
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int yylex() {return 0;}
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}
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#include <fstream>
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int main( int argc, const char *argv[]) {
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if (argc < 2) {
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fprintf(stderr, "Need an argument\n");
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return 1;
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}
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std::ifstream ifs(argv[1]);
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FlexLexer *lexer = new yyFlexLexer(ifs, std::cout);
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while(lexer->yylex() != 0)
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;
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return 0;
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}
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