Iain Sandoe 25558a1bfd [C++20][Modules] Update ADL to handle basic.lookup.argdep p4 [P1815R2 part 1] ...

This includes the revised provisions of [basic.lookup.argdep] p4

1. ADL is amended to handle p 4.3 where functions in trasitively imported modules may
become visible when they are exported in the same namespace as a visible type.

2. If a function is in a different modular TU, and has internal-linkage, we invalidate
its entry in an overload set.

[basic.lookup.argdep] p5 ex 2 now passes.

Differential Revision: https://reviews.llvm.org/D129174

2022-07-25 14:28:59 +01:00

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