Fixed some function parsing.

src/exec.c

@@ -14,6 +14,7 @@ ASTNumData exec_exp(AST* ast) {
         case AST_TYPE_CALL: return exec_call(ast);
         case AST_TYPE_NUM:  return *(ASTNumData*)ast->data;
         default:            printf("what\n");
+                            exit(1);
     }
 }
 

src/grammar.y

@@ -61,7 +61,7 @@ exp:
     | LGROUP exp RGROUP { $$ = $2; }
 
     // Variable reference.
-    | WORD
+    //| WORD
 
     // Function call.
     // name(thing, thing)