Fix issue 6400 - Better interaction between with() and opDispatch

[LemonBoy]

No description provided.

[dlang-bot]

Fix	Bugzilla	Description
✓	6400	opDispatch with WithStatement

[WalterBright]

This logic could be simplified by moving it inside the loop above.

[LemonBoy]

@WalterBright What about nested with() scopes? In the following example should we warn the user if both foo and bar implement opDispatch? Should we traverse all the scopes until we find a wthis that implements opDispatch?

with (foo)
{
    with (bar)
    {
        baz();
    }
}

[WalterBright]

I'd say the innermost scope wins.

[WalterBright]

Looks good. Please add a test case with the nested with case, and I'll pull it.

[LemonBoy]

I've touched up the test-case a bit, I hope it's not too convoluted.

[PetarKirov]

I would have expected calling f2 to print foo here.

[PetarKirov]

@andralex @WalterBright what's your take on this? It's very unusual that outer symbols are not visible in inner scopes (even if the symbol is rewritten to opDispatch).

[denis-sh]

Yes, looks like one more step closer to C++'s "nobody knows what this language construct will actually do".