%{
#include <iostream>
#include <string>

#include "Token.hpp"
#include "parser_gen.h"

using namespace std;

%}

%option noyywrap

integer    [0-9]+
real       [0-9]+\.[0-9]*|\.[0-9]+
operator   "+"|"-"|"/"|"*"|">"|"<"|"<="|">="|"="|"!="
ident      [a-zA-Z_][0-9a-zA-Z_]*
string     \"[^\n"]+\"
%%

{integer}         { return(INTEGER); }
{real}            { return(FLOAT); }
{string}          { return(STRING); }
{operator}        { return(DO) }
"->"              { return(ASSIGN); }
"=>"              { return(IMPLIES); }
"Do"              { return(DO); }
"LpWhile"         { return(LPWHILE); }
"While"           { return(WHILE); }
"WhileEnd"        { return(WHILEEND); }
"If"              { return(IF); }
"Then"            { return(THEN); }
"Else"            { return(ELSE); }
"IfEnd"           { return(IFEND); }
"For"             { return(FOR); }
"To"              { return(TO); }
"Step"            { return(STEP); }
"Next"            { return(NEXT); }
"Goto"            { return(GOTO); }
"Lbl"             { return(LABEL); }
"Break"           { return(BREAK); }
"Return"          { return(RETURN); }
"Stop"            { return(STOP); }
{ident}           { return(IDENTIFIER); }
"\n"              { return(EOL); }
[ \t]+
.                 { cerr << "Invalid character: " << yytext << endl; }

%%