code:
---
struct Foo
{
bool opIn_r(T)(T t){return false;}
}
static immutable Foo foo; // ouch
//static Foo foo; // OK
void main()
{
assert("a" !in foo);
}
---
output:
---
Error: template Foo.opIn_r cannot deduce function from argument
types !()(string) immutable, candidates are:
runnable.Foo.opIn_r(T)(T t) ---
