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%option noyywrap
%{
// Avoid error "error: fileno was not declared in this scope"
extern "C" int fileno(FILE *stream);
#include "c_parser.tab.hpp"
%}
KEYWORD auto|double|int|struct|break|else|long|switch|case|enum|register|typedef|char|extern|return|union|const|float|short|unsigned|continue|for|signed|void|default|goto|sizeof|volatile|do|if|static|while
IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]*
OPERATOR [.][.][.]|[<>][<>][=]|[-][-]|[+][+]|[|][|]|[#][#]|[&][&]|[+\-*\/<>=!%^|&][=]|[<][<]|[->][>]|[<>&=+\/\-*(){}\[\]\.,%~!?:|^;]
FRACTIONALCONSTANT (([0-9]*\.[0-9]+)|([0-9]+\.))
EXPONENTPART ([eE][+-]?[0-9]+)
FLOATINGSUFFI X ([flFL])
INTEGERSUFFIX ([uU][lL]|[lL][uU]|[uUlL])
DECIMALCONSTANT ([1-9][0-9]*)
OCTALCONSTANT ([0][0-7]*)
HEXCONSTANT ([0][xX][0-9A-Fa-f]+)
CHARCONSTANT ('(([\\]['])|([^']))+')
STRINGLITERAL ["](([\\]["])|([^"]))*["]
WHITESPACE [ \t\r\n]+
PREPROC [#][ ][0-9]+[ ]{STRINGLITERAL}[ 0-9]*
ALL .
%%
typedef|extern|static|auto|register { return T_STRG_SPEC; }
void|char|short|int|long|float|double|signed|unsigned { return T_TYPE_SPEC; }
const|volatile { return T_TYPE_QUAL; }
{IDENTIFIER} { yylval.string = new std::string(yytext); return T_IDENTIFIER; }
[;] { return T_SC; }
[=] { return T_EQ; }
[=][=] { return T_EQUALITY; }
[,] { return T_CMA; }
[(] { return T_LRB; }
[)] { return T_RRB; }
[{] { return T_LCB; }
[}] { return T_RCB; }
if { return T_IF; }
else { return T_ELSE; }
({HEXCONSTANT}|{OCTALCONSTANT}|{DECIMALCONSTANT}){INTEGERSUFFIX}? { return T_INT_CONST; }
{WHITESPACE} { ; }
. { fprintf(stderr, "Invalid token\n"); exit(1); }
%%
void yyerror(char const *s) {
fprintf (stderr, "Parse error : %s\n", s);
exit(1);
}
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