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%option noyywrap
%{
#include "c_parser.tab.hpp"
%}
IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]*
ASSIGNMENT_OPERATOR (([<>][<>]|[*\/%+\-&^|])[=])
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 .
%%
(void) { return T_VOID; }
(char) { return T_CHAR; }
(short) { return T_SHORT; }
(int) { return T_INT; }
(long) { return T_LONG; }
(float) { return T_FLOAT; }
(double) { return T_DOUBLE; }
(signed) { return T_SIGNED; }
(unsigned) { return T_UNSIGNED; }
(typedef) { return T_TYPEDEF; }
(extern) { return T_EXTERN; }
(static) { return T_STATIC; }
(auto) { return T_AUTO; }
(register) { return T_REGISTER; }
(const) { return T_CONST; }
(volatile) { return T_VOLATILE; }
(continue) { return T_CONTINUE; }
(break) { return T_BREAK; }
(goto) { return T_GOTO; }
(case) { return T_CASE; }
(default) { return T_DEFAULT; }
(switch) { return T_SWITCH; }
[.][.][.] { return T_ELLIPSIS; }
[;] { return T_SC; }
[,] { return T_CMA; }
[(] { return T_LRB; }
[)] { return T_RRB; }
[{] { return T_LCB; }
[}] { return T_RCB; }
[[] { return T_LSB; }
[]] { return T_RSB; }
[=] { yylval.string = new std::string(yytext); return T_EQ; }
{ASSIGNMENT_OPERATOR} { yylval.string = new std::string(yytext); return T_ASSIGN_OPER; }
[?] { return T_QU; }
[:] { return T_COL; }
[|][|] { return T_LOG_OR; }
[&][&] { return T_LOG_AND; }
[|] { return T_OR; }
[\^] { return T_XOR; }
[&] { yylval.string = new std::string(yytext); return T_AND; }
[=][=] { yylval.string = new std::string(yytext); return T_EQUALITY_OP; }
[!][=] { yylval.string = new std::string(yytext); return T_EQUALITY_OP; }
([<>][=])|[<>] { yylval.string = new std::string(yytext); return T_REL_OP; }
[<>][<>] { yylval.string = new std::string(yytext); return T_SHIFT_OP; }
[*] { yylval.string = new std::string(yytext); return T_MULT; }
[\/] { yylval.string = new std::string(yytext); return T_DIV; }
[%] { yylval.string = new std::string(yytext); return T_REM; }
[~] { yylval.string = new std::string(yytext); return T_TILDE; }
[!] { yylval.string = new std::string(yytext); return T_NOT; }
[.] { return T_DOT; }
[-][>] { return T_ARROW; }
[+-][+-] { yylval.string = new std::string(yytext); return T_INCDEC; }
[+-] { yylval.string = new std::string(yytext); return T_ADDSUB_OP; }
if { return T_IF; }
else { return T_ELSE; }
return { return T_RETURN; }
while { return T_WHILE; }
do { return T_DO; }
for { return T_FOR; }
sizeof { return T_SIZEOF; }
{IDENTIFIER} { yylval.string = new std::string(yytext); return T_IDENTIFIER; }
({HEXCONSTANT}|{OCTALCONSTANT}|{DECIMALCONSTANT}){INTEGERSUFFIX}? { yylval.number = strtol(yytext, NULL, 0); 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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