1 files changed, 39 insertions, 0 deletions
diff --git a/yacclex/calclexret/calc.l b/yacclex/calclexret/calc.l
new file mode 100644
index 0000000..f681fa5
--- /dev/null
+++ b/yacclex/calclexret/calc.l
@@ -0,0 +1,39 @@
+%{
+enum yytokentype {
+	NUMBER = 258,
+	ADD = 259,
+	SUB = 260,
+	MUL = 261,
+	DIV = 262,
+	ABS = 263,
+	EOL = 264
+};
+
+int yylval;
+%}
+
+%%
+"+"    { return ADD;                                }
+"-"    { return SUB;                                }
+"*"    { return MUL;                                }
+"/"    { return DIV;                                }
+"|"    { return ABS;                                }
+[0-9]+ { yylval = atoi(yytext); return NUMBER;      }
+\n     { return EOL;                                }
+[ \t]  { /* ignore whitespace */                    }
+.      { printf("Mystery character %c\n", *yytext); }
+%%
+
+int yywrap() {
+	return 1;
+}
+
+int main(void) {
+	int tok;
+	while((tok = yylex())) {
+		printf("%d", tok);
+		if(tok == NUMBER)
+			printf(" = %d\n", yylval);
+		else printf("\n");
+	}
+}