@@ -5824,15 +5824,46 @@
}
// String constant expressions.
- if (op == OPERATOR_PLUS
- && left->type()->is_string_type()
- && right->type()->is_string_type())
+ if (left->type()->is_string_type() && right->type()->is_string_type())
{
std::string left_string;
std::string right_string;
if (left->string_constant_value(&left_string)
&& right->string_constant_value(&right_string))
- return Expression::make_string(left_string + right_string, location);
+ {
+ if (op == OPERATOR_PLUS)
+ return Expression::make_string(left_string + right_string,
+ location);
+ else if (is_comparison)
+ {
+ int cmp = left_string.compare(right_string);
+ bool r;
+ switch (op)
+ {
+ case OPERATOR_EQEQ:
+ r = cmp == 0;
+ break;
+ case OPERATOR_NOTEQ:
+ r = cmp != 0;
+ break;
+ case OPERATOR_LT:
+ r = cmp < 0;
+ break;
+ case OPERATOR_LE:
+ r = cmp <= 0;
+ break;
+ case OPERATOR_GT:
+ r = cmp > 0;
+ break;
+ case OPERATOR_GE:
+ r = cmp >= 0;
+ break;
+ default:
+ go_unreachable();
+ }
+ return Expression::make_boolean(r, location);
+ }
+ }
}
// Special case for shift of a floating point constant.