[Issue 16570] [REG 2.072.0-b1] Enum member with interpreted initializer has type of initializer not enum

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16570

--- Comment #3 from github-bugzilla at puremagic.com ---
Commits pushed to stable at https://github.com/dlang/dmd

https://github.com/dlang/dmd/commit/620ecc2fa91dd88310a9205666fc0c826a778303
fix Issue 16570 - Enum member with interpreted...

...initializer has type of initializer not enum

- There is a very old (dmd 0.50 [¹]) mismatch of the CastExp's `to` type
  and the type painted on the CastExp (the latter being the basetype of
  the former, i.e. EnumType vs. int) in the result of
  `Expression.castTo(ed.type)`.
  Because of that difference interpreting castTo might unexpectedly use
  the basetype instead of the enum type for the enum initializer, and
  thus triggers the can't convert int to EnumType error.

- The trigger was introduced with the addition of a `e.ctfeInterpret` in
  denum.d (see 932be192e3).

- Comments on CastExp suggest that this type mismatch is actually
  intended, I don't see any reason for it though.

- Alternatively we could somehow fix ctfeInterpret to preserve CastExp's
  painted type.

[¹]:
https://github.com/dlang/dmd/blob/bde09435d149c699490bb888b832228e0d31c221/src/cast.c#L321-L323respect

https://github.com/dlang/dmd/commit/fa464f3742f5b92324a20597489c475118a293cc
Merge pull request #6175 from MartinNowak/fix16570

fix Issue 16570 - Enum member with interpreted...

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