"Find All References" doesn't work on explicit implementation of conversion operator.

[AlekseyTs]

interface I4<T> where T : I4<T>
{
    abstract static int operator +(T x);
}

class C4_2 : I4<C4_2>
{

    // Explicit implementation
    static int I4<C4_2>.operator +(C4_2 x) => default;
}

interface I5<T> where T : I5<T>
{
    abstract static implicit operator int(T x);
}

class C5_2 : I5<C5_2>
{

    // Explicit implementation
    static implicit I5<C5_2>.operator int(C5_2 x) => default;
}

Observed:
I couldn't find a way to get "Find All References" working on static implicit I5<C5_2>.operator int(C5_2 x).

Expected:
Works as expected on a + token in static int I4<C4_2>.operator +(C4_2 x), finds the declaration and the call sites. Expect to be able to do something similar with conversion operator.

[AlekseyTs]

CC @sharwell

[sharwell]

@Cosifne if FAR does not work for normal conversion operators, we probably don't need to prioritize making it work just for these (i.e. group it with the higher level requests like #30210, #50850). Can you check the current status of other conversion operators, and move this to milestone Backlog if the others are currently also not working?

[CyrusNajmabadi]

We don't support implicit conversions in far as there is no efficient way in the compiler to find them. We do support explicit conversions and operators (and those should be supported for static abstracts.

[Cosifne]

For operators:

It should be fixed by this PR #54056

[Cosifne]

🙁
Completely lose Internet yesterday when I wrote posts.

For customized type conversion:
Invoke FAR results:

I think this should meet our expectation