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Author SHA1 Message Date
Arthur O'Dwyer 41b17c444d [libc++] Fix signed overflow inside ranges::advance. 
See LWG reflector thread of 2021-07-23 titled
'Question on ranges::advance and "past-the-sentinel iterators"'.
Test case heavily based on one graciously provided by Casey Carter.

Differential Revision: https://reviews.llvm.org/D106735
 2021-07-26 16:41:21 -04:00
zoecarver 1e4ba7eba6 [libcxx][nfc] Global `constexpr friend` -> `friend constexpr`. 2021-07-23 09:08:50 -07:00
Christopher Di Bella 0cf65382ad [libcxx][modularisation] properly modularises advance, next, and prev 
`__function_like` wasn't being exported, so certain properties of the
`ranges` functions weren't being propagated in modules land.

Differential Revision: https://reviews.llvm.org/D105078
 2021-07-22 23:30:02 +00:00
Louis Dionne 74fb868942 [libc++] Add XFAIL for Clang ToT with modules 
This is what I should have done instead of 6afd6e96ce.
 2021-07-08 14:40:18 -04:00
Christopher Di Bella c5076d8371 Revert "Revert "[libcxx][module-map] creates submodules for private headers"" 
This reverts commit d9633f229c as a
workaround was discovered.

Differential Revision: https://reviews.llvm.org/D104170
 2021-06-16 16:36:41 +00:00
Louis Dionne 9f967eed89 [libc++] NFC: More refactoring in the prev/next/advance tests per review comments 2021-06-14 08:42:44 -04:00
Louis Dionne 8e93aa304b [libc++] Refactor the tests for std::prev, next and advance 
This started as an attempt to fix a GCC 11 warning of misplaced parentheses.
I then noticed that trying to fix the parentheses warning actually triggered
errors in the tests, showing that we were incorrectly assuming that the
implementation of ranges::advance was using operator+= or operator-=.

This commit fixes that issue and makes the tests easier to follow by
localizing the assertions it makes.

Differential Revision: https://reviews.llvm.org/D103272
 2021-06-14 08:13:14 -04:00
Louis Dionne b6399e85d8 Revert "[libc++] NFC: Parenthesize expression to satisfy GCC 11" 
That fix was actually incorrect and caused tests to start failing.
 2021-05-27 13:42:39 -04:00
Louis Dionne 73099e786a [libc++] NFC: Parenthesize expression to satisfy GCC 11 
Otherwise it issues a -Werror=parentheses suggesting parentheses.
 2021-05-27 11:41:29 -04:00
Christopher Di Bella 0dc7fd1bc1 [libcxx][iterator] adds `std::ranges::prev` 
Implements part of P0896 'The One Ranges Proposal'.
Implements [range.iter.op.prev].

Depends on D102563.

Differential Revision: https://reviews.llvm.org/D102564
 2021-05-27 04:41:27 +00:00
Christopher Di Bella 857fa7b7b1 [libcxx][iterator] adds `std::ranges::next` 
Implements part of P0896 'The One Ranges Proposal'.
Implements [range.iter.op.next].

Depends on D101922.

Differential Revision: https://reviews.llvm.org/D102563
 2021-05-27 04:41:26 +00:00
Christopher Di Bella 36d0fdf9ac [libcxx][iterator] adds `std::ranges::advance` 
Implements part of P0896 'The One Ranges Proposal'.
Implements [range.iter.op.advance].

Differential Revision: https://reviews.llvm.org/D101922
 2021-05-26 04:27:30 +00:00