tokens.l

%{
#include <string>
#include "node.h"
#include "parser.hpp"
#define SAVE_TOKEN yylval.string = new std::string(yytext, yyleng)
#define TOKEN(t) (yylval.token = t)
extern "C" int yywrap() { }
%}

%%

[ \t\n]					;
[a-zA-Z_][a-zA-Z0-9_]* 	SAVE_TOKEN; return TIDENTIFIER;
[0-9]+\.[0-9]* 			SAVE_TOKEN; return TDOUBLE;
[0-9]+					SAVE_TOKEN; return TINTEGER;
"="						return TOKEN(TEQUAL);
"=="					return TOKEN(TCEQ);
"!="					return TOKEN(TCNE);
"<"						return TOKEN(TCLT);
"<="					return TOKEN(TCLE);
">"						return TOKEN(TCGT);
">="					return TOKEN(TCGE);
"("						return TOKEN(TLPAREN);
")"						return TOKEN(TRPAREN);
"{"						return TOKEN(TLBRACE);
"}"						return TOKEN(TRBRACE);
"."						return TOKEN(TDOT);
","						return TOKEN(TCOMMA);
"+"						return TOKEN(TPLUS);
"-"						return TOKEN(TMINUS);
"*"						return TOKEN(TMUL);
"/"						return TOKEN(TDIV);
.						printf("Unknown token!\n"); yyterminate();

%%