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| os | None |
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| git_commit |
commit 2527b071ba2e39fdd62eeb73b89318468595c316 Author: Nikolas Klauser <nikolasklauser@berlin.de> Date: Sun Nov 2 10:30:31 2025 +0100 [libc++] P2641R4: Checking if a `union` alternative is active (`std::is_within_lifetime`) (#165243) <https://wg21.link/P2641R4> Implements the C++26 function in `<type_traits>` [meta.const.eval] (and the corresponding feature test macro `__cpp_lib_is_within_lifetime`) ```c++ template<class T> consteval bool is_within_lifetime(const T*) noexcept; ``` This is done with the `__builtin_is_within_lifetime` builtin added to Clang 20 by #91895 / 2a07509c8d3c8b5b2c88e4f73dde0071bf506870. This is not (currently) available with GCC. This implementation has provisions for LWG4138 <https://cplusplus.github.io/LWG/issue4138> where it is ill-formed to instantiate `is_within_lifetime<T>` with a function type `T`. Closes #105381 Co-authored-by: Mital Ashok <mital@mitalashok.co.uk> |
Filter
ldionne-old-macbook-results test results
| Run | Order | Start Time | Duration |
|---|---|---|---|
| Current | 557914 | 2025-12-16T16:40:01 | 0:00:00 |
| Previous | 557913 | 2025-12-16T16:40:01 | 0:00:00 |
| Baseline | 485288 | 2025-12-16T16:40:01 | 0:00:00 |
Tests Summary
| Status Group | # | # (B) |
|---|---|---|
| Performance Regressions | 5 | 0 |
| Performance Improvements | 1 | 0 |
| Added Tests | 0 | 16 |
| Unchanged Tests | 74 | 64 |
| Total Tests | 80 |
| Performance Regressions - execution_time | Δ | Previous | Current | σ | Δ (B) | σ (B) |
|---|---|---|---|---|---|---|
| 753_ns3_r | 2.39% | 9.986 | 10.224 | - | 0.00% | - |
| 706_stockfish_r | 1.67% | 21.559 | 21.919 | - | 0.00% | - |
| 729_abc_r | 1.55% | 18.667 | 18.957 | - | 0.00% | - |
| 750_sealcrypto_r | 1.16% | 18.517 | 18.732 | - | 0.00% | - |
| 707_ntest_r | 1.03% | 16.482 | 16.651 | - | 0.00% | - |
| Performance Improvements - execution_time | Δ | Previous | Current | σ | Δ (B) | σ (B) |
|---|---|---|---|---|---|---|
| 710_omnetpp_r | -1.68% | 8.591 | 8.447 | - | 0.00% | - |
| Added Tests - execution_time |
|---|
| 706_stockfish_r |
| 707_ntest_r |
| 709_cactus_r |
| 710_omnetpp_r |
| 721_gcc_r |
| 723_llvm_r |
| 727_cppcheck_r |
| 729_abc_r |
| 731_astcenc_r |
| 735_gem5_r |
| 736_ocio_r |
| 737_gmsh_r |
| 748_flightdm_r |
| 750_sealcrypto_r |
| 753_ns3_r |
| 766_femflow_r |
Report Time: 0.15s