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/* SI 413 Fall 2011
 * Lab 6
 * spl-pt1.lpp
 * This is a scanner specification for the SPL programming language.
 * The semantic values are all one-node ParseTree objects.
 */

%{
#include <iostream>
using namespace std;
#include "parsetree.hpp"
#include "spl1.tab.hpp"
%}

%option noyywrap

%%

[0-9]+     {yylval = new ParseTree(yytext); return NUM;}
true|false {yylval = new ParseTree(yytext); return BOOL;}
[+-]       {yylval = new ParseTree(yytext); return OPA;}
[*/]       {yylval = new ParseTree(yytext); return OPM;}
and|or     {yylval = new ParseTree(yytext); return BOP;}
"!"        {yylval = new ParseTree(yytext); return NOT;}
":="       {yylval = new ParseTree(yytext); return ASN;}
"("        {yylval = new ParseTree(yytext); return LP;}
")"        {yylval = new ParseTree(yytext); return RP;}
"{"        {yylval = new ParseTree(yytext); return LC;}
"}"        {yylval = new ParseTree(yytext); return RC;}
";"        {yylval = new ParseTree(yytext); return STOP;}
[><=]|([><!]=) {yylval = new ParseTree(yytext); return COMP;}
if         {yylval = new ParseTree(yytext); return IF;}
else       {yylval = new ParseTree(yytext); return ELSE;}
while      {yylval = new ParseTree(yytext); return WHILE;}
read       {yylval = new ParseTree(yytext); return READ;}
write      {yylval = new ParseTree(yytext); return WRITE;}
lambda     {yylval = new ParseTree(yytext); return LAMBDA;}
new        {yylval = new ParseTree(yytext); return NEW;}
[a-zA-Z0-9_]+ {yylval = new ParseTree(yytext); return ID;}
<<EOF>>  { return 0; }
[ \t\n]+ { }
"#".*    { }
.        { cerr << "Unrecognized token!" << endl; exit(1); }
%%