[Issue 21537] Function pointers' attributes not covariant when referencing (delegates' are)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21537

--- Comment #1 from Bolpat <qs.il.paperinik at gmail.com> ---
Related:

interface I
{
    void f(const(void function() @safe)* fpp) @safe;
    void g(const(void delegate() @safe)* dgp) @safe;
}

class C : I
{
    override void f(const(void function())* fpp) @safe { } // error
(unexpected)
    override void g(const(void delegate())* fpp) @safe { } // okay (expected)
}

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