%{
#include "y.tab.h"
  char *tname;
%}

%option noyywrap

symbol		[+\-*/();,.]
digit		[0-9]
letter		[a-zA-Z]

%%
{symbol}		{ return yytext[0]; 	}
":="			{ return COLOEQ; 	}
"="			{ return EQ;		}
"<>"			{ return NOTEQ;	}
"<"			{ return LT;		}
">"			{ return GT;		}
"<="			{ return LE;		}
">="			{ return GE;		}
"const"		{ return CONST;	}
"var"			{ return VAR;		}
"function"		{ return FUNCTION;	}
"begin"		{ return BEGINN;	}
"end"			{ return END;		}
"if"			{ return IF;		}
"then"			{ return THEN;	}
"while"		{ return WHILE;	}
"do"			{ return DO;		}
"return"		{ return RETURN;	}
"write"		{ return WRITE;	}
"writeln"		{ return WRITELN;	}
"odd"			{ return ODD;		}
{letter}({letter}|{digit})*	{ tname = (char*)malloc(strlen(yytext)+1);
                          strcpy(tname, yytext);
                          yylval.name = tname;
                          return IDENT;		}
{digit}+		{ yylval.val = atoi(yytext); return NUMBER; 	}
[ \t\n\r]			
.			{ printf("Unknown token[%s]\n",yytext);}
%%