Support LP64 platforms such as Darwin where int64_t is long long. (#7596)

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Add `Core.CppCompat.[U]Long64` to represent a 64-bit long that is not
`i64`. Treat it as being "just slightly smaller than" `i64`, like we
treat `Core.CppCompat.LongLong64` as being "just slightly larger than"
`i64`, so that we get implicit conversions `Cpp.long` -> `i64` ->
`Cpp.long_long` on all targets.

This follows the direction of proposal #5448, and seems like the obvious
extension of the `[U]Long32` and `[U]LongLong64` types added in #6275
for targets of this "shape".

Assisted-by: Gemini via Antigravity

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This commit is contained in:

Richard Smith

2026-08-07 16:10:01 +00:00

committed by GitHub

parent ee2b3888ef

commit c278bea3c5

16 changed files with 4904 additions and 3492 deletions

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