...enforce(0); } // error
int foo(){ assert(0); } // ok

"No compiler magic" would e.g. mean...

...and is not a function call. It's OK when the RHS is a literal.

--

...there are some instances where it's OK I think. For example, when dealing with...

...accepting individual @restrict pointer arguments are an OK alternative but when working with multiple inputs...

...as in the line with **.
I'm ok if it instead tries a constant copy...

...to modify an object, I'm perfectly ok that I can't use may of...

...ptr) {
	if (ptr !is null) {
		writeln(*ptr); // ok pointer is known to be good
		writeln...

Woah. Is this @safe?
Ok, I know this is a fresh copy, that hopefully doesn...

Ok, I understand that.

...code has circular reference type, and compile ok. and there is a lot type I...