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%{
#include "ast.h"
#include "grammar.tab.h"
%}
%%
"+" { return OPERATOR_PLUS; }
"-" { return OPERATOR_MINUS; }
"=" { return ASSIGN; }
"function" { return FUNCTION; }
"if" { return IF; }
"else" { return ELSE; }
"return" { return RETURN; }
"const" { return CONST; }
"var" { return VAR; }
"integer" { return TYPE_INTEGER; }
"string" { return TYPE_STRING; }
"void" { return TYPE_VOID; }
"(" { return PARENTHESIS_LEFT; }
")" { return PARENTHESIS_RIGHT; }
"{" { return BRACE_LEFT; }
"}" { return BRACE_RIGHT; }
"[" { return BRACKET_LEFT; }
"]" { return BRACKET_RIGHT; }
"," { return COMMA; }
":" { return COLON; }
[a-zA-Z][a-zA-Z0-9]* { yylval.string = yytext; return IDENTIFIER; }
[0-9]+ { yylval.number = atoi(yytext); return NUMBER; }
"//".* { return COMMENT; }
\n { return END_OF_LINE; }
[ \t] {}
. { printf("undefined: %c\n", *yytext); }
%%
void henshin_lex(int argc, char **argv)
{
int tok;
while (tok = yylex()) {
printf("%d", tok);
if (tok == NUMBER) {
printf(" = %d", yylval);
}
printf("\n");
}
}
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