lexer.lpp

%{
    #include"assignment.tab.hpp"
    #include<bits/stdc++.h>
    #include<string>
    using namespace std;
%}
%option noyywrap
%%
"." {return stop;}

","   {return comma;}

"ADD"|"SUBTRACT"|"MULTIPLY"|"DIVIDE"   {    yylval.id = new string(yytext);
                                            return operation;}
                                            
[Aa][Dd][Dd]|[Ss][Uu][Bb][Ss][Tt][Rr][Aa][Cc][Tt]|[Mm][Uu][Ll][Tt][Ii][Pp][Ll][Yy]|[Dd][Ii][Vv][Ii][Dd][Ee] {   yylval.id = new string(yytext);
                                                                                                                    return small_operation;}

"LEFT"|"RIGHT"|"UP"|"DOWN"  {   yylval.id = new string(yytext);
                                return direction;}

[Ll][Ee][Ff][Tt]|[Rr][Ii][Gg][Hh][Tt]|[Uu][Pp]|[Dd][Oo][Ww][Nn]  {  yylval.id = new string(yytext);
                                                                    return small_direction;}

"ASSIGN" {return assign;}

"VALUE" {return value;}

"VAR"   {return var;}

"TO"    {return to;}

"IS"    {return is;}

"IN"    {return in;}

[Aa][Ss][Ss][Ii][Gg][Nn] {return small_assign;}

[Vv][Aa][Ll][Uu][Ee] {return small_value;}

[Tt][Oo] {return small_to;}

[Vv][Aa][Rr] {return small_var;}

[Ii][Ss] {return small_is;}

[Ii][Nn] {return small_in;}

[0-9]+ {yylval.num = atoi(yytext);
            return number;}

[a-zA-Z0-9_\-@#\$%^&\*!\(\)\+\=\[\]\{\}\"\'\:\;\/\`\~\?\<\>]+ {yylval.id = new string(yytext);
                                                                return identifier;}

[\n] {return eol;}

[ \t]+ {;}

.  {;}
%%