Bug 12338 – @trusted delegates should implicitly cast to @safe

@safe void test(void delegate() @safe dg) { dg(); } @trusted void bug() { } void main() @safe { test(&bug); } safety.d(8): Error: function safety.test (void delegate() @safe dg) is not callable using argument types (void function() @trusted) I think that should work since @trusted functions can normally be called by @safe functions, so the delegate should implicitly cast too. Note that if you change the call line to this: test({ bug(); }); It will compile - the anonymous delegate is inferred as @safe.

I think the same idea applies to 'void function() @safe' as well, as you could trivially wrap any @trusted function in a @safe function.

&bug is not a delegate, it is a function. @trusted delegates do convert to @safe delegates.

Well, that's embarrassing, it even said that in the error message I copy/pasted! But yeah, i just double checked, it does indeed work with functions and delegates both if you pick the right one.