// Ideally this should work, at least give a nice error messae
/**
REQUIRED_ARGS: -de
TEST_OUTPUT:
---
fail_compilation/issue21203.d(12): Error: `pragma(mangle)` cannot apply to a template declaration
fail_compilation/issue21203.d(12):        use `template F(Args...) { pragma(mangle, "gdkfjgh") ... }`
---
*/

extern(C++)
pragma(mangle,"gdkfjgh")
class F(T)
{

}
void use(F!int a) {}
