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2025-08-05[Clang] Add detailed notes explaining why `is_constructible` evaluates to ↵Corentin Jabot
false (Revert 16d5db7) (#151935) Adds explanation why `is_constructible` evaluates to false. This reapplies as-is e476f968bc8e438a0435d10934f148de570db8eb. This was reverted in 16d5db71b3c38f21aa17783a8758f947dca5883f because of a test failure in libc++. The test failure in libc++ is interesting in that, in the absence of nested diagnostics a bunch of diagnostics are emitted as error instead of notes, which we cannot silence with `-verify-ignore-unexpected`. The fix here is to prevent the diagnostics to be emitted in the first place. However this is clearly not ideal and we should make sure to deploy a better solution in the clang 22 time frame, in the lines of https://discourse.llvm.org/t/rfc-add-a-new-text-diagnostics-format-that-supports-nested-diagnostics/87641/12 Fixes #150601 --------- Co-authored-by: Shamshura Egor <164661612+egorshamshura@users.noreply.github.com>
2025-07-30Revert "[libc++][Clang] Added explanation why is_constructible evaluated to ↵Victor Campos
false. Updated the diagnostics checks in libc++ tests. (#144220)" This reverts commit e476f968bc8e438a0435d10934f148de570db8eb. It has introduced a failure tracked by https://github.com/llvm/llvm-project/issues/150601 One libcxx test fail if libcxx is build with no exceptions and no RTTI: - libcxx/utilities/expected/expected.expected/value.observers.verify.cpp
2025-07-08[libc++][Clang] Added explanation why is_constructible evaluated to false. ↵Shamshura Egor
Updated the diagnostics checks in libc++ tests. (#144220) Added explanation why a is constructible evaluated to false. Also fixed problem with ExtractTypeTraitFromExpression. In case std::is_xxx_v<> with variadic pack it tries to get template argument, but fails in expression Arg.getAsType() due to Arg.getKind() == TemplateArgument::ArgKind::Pack, but not TemplateArgument::ArgKind::Type. Reverts #144127 Fixies https://github.com/llvm/llvm-project/pull/143309#issuecomment-2970012054
2024-04-09[libc++] Implement `bind_back` (#81055)Jakub Mazurkiewicz
Implement `std::bind_back` function from P2387R3 "Pipe support for user-defined range adaptors".