Changes in format

b9a2658a3e8bd13b0f9e7a8a440832a95b377216 - [libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

Sat, 21 Dec 2024 12:01:48 +0000

[libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)This patch implements the forwarding to frozen C++03 headers asdiscussed inhttps://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In theRFC, we initially proposed selecting the right headers from the Clangdriver, however consensus seemed to steer towards handling this in thelibrary itself. This patch implements that direction.At a high level, the changes basically amount to making each publicheader look like this:```// inside #ifdef _LIBCPP_CXX03_LANG# include <__cxx03/vector>#else // normal content#endif```In most cases, public headers are simple umbrella headers so there isn'tmuch code in the #else branch. In other cases, the #else branch containsthe actual implementation of the header. List of files: /llvm-project/libcxx/include/format

c166a9c713ec86b86f1f178a5133bc128fd0a610 - [libc++] Add #if 0 block to all the top-level headers (#119234)

Tue, 10 Dec 2024 15:02:12 +0000

[libc++] Add #if 0 block to all the top-level headers (#119234)Including The frozen C++03 headers results in a lot of formattingchanges in the main headers, so this splits these changes into aseparate commit instead.This is part ofhttps://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. List of files: /llvm-project/libcxx/include/format

c6f3b7bcd0596d30f8dabecdfb9e44f9a07b6e4c - [libc++] Refactor the configuration macros to being always defined (#112094)

Wed, 06 Nov 2024 09:39:19 +0000

[libc++] Refactor the configuration macros to being always defined (#112094)This is a follow-up to #89178. This updates the `<__config_site>`macros. List of files: /llvm-project/libcxx/include/format

f08df56d3af3e67ab39ebbfb62be3ed3f86d0c9d - [libc++][format] Implements P3107R5 in . (#86713)

Tue, 30 Jul 2024 17:04:26 +0000

[libc++][format] Implements P3107R5 in . (#86713)This adds the new std::enable_nonlocking_formatter_optimization trait in . This trait will be used in std::print to implement the performance benefits. Implements parts of - P3107R5 - Permit an efficient implementation of ``std::print`` List of files: /llvm-project/libcxx/include/format

ec56790c3b27df4fa1513594ca9a74fd8ad5bf7f - [libcxx] don't `#include ` if wide chars aren't enabled (#99911)

Tue, 23 Jul 2024 13:09:34 +0000

[libcxx] don't `#include ` if wide chars aren't enabled (#99911)Pull request #96032 unconditionall adds the `cwchar` include in the `format` umbrella header. However support for wchar_t can be disabled in the build system (LIBCXX_ENABLE_WIDE_CHARACTERS). This patch guards against inclusion of `cwchar` in `format` by checking the `_LIBCPP_HAS_NO_WIDE_CHARACTERS` define. For clarity I've also merged the include header section that `cwchar` was in with the one above as they were both guarded by the same `#if` logic. List of files: /llvm-project/libcxx/include/format

dfddc0c4843baaf9605aeb1c4f82eac185e90265 - [libc++] Include the rest of the detail headers by version in the umbrella headers (#96032)

Thu, 18 Jul 2024 08:59:58 +0000

[libc++] Include the rest of the detail headers by version in the umbrella headers (#96032)This is a follow-up to #83740. List of files: /llvm-project/libcxx/include/format

e3dea5e3410fd6a1e549cfa7021c4f8652b36095 - [libc++][format] Improves escaping performance. (#88533)

Sun, 28 Apr 2024 10:15:25 +0000

[libc++][format] Improves escaping performance. (#88533)The previous patch implemented - P2713R1 Escaping improvements in std::format - LWG3965 Incorrect example in [format.string.escaped] p3 for formatting of combining characters These changes were correct, but had a size and performance penalty. This patch improves the size and performance of the previous patch. The performance is still worse than before since the lookups may require two property lookups instead of one before implementing the paper. The changes give a tighter coupling between the Unicode data and the algorithm. Additional tests are added to notify about changes in future Unicode updates. Before ``` ----------------------------------------------------------------------- Benchmark Time CPU Iterations ----------------------------------------------------------------------- BM_ascii_escaped 110704 ns 110696 ns 6206 BM_unicode_escaped 101371 ns 101374 ns 6862 BM_cyrillic_escaped 63329 ns 63327 ns 11013 BM_japanese_escaped 41223 ns 41225 ns 16938 BM_emoji_escaped 111022 ns 111021 ns 6304 BM_ascii_escaped 112441 ns 112443 ns 6231 BM_unicode_escaped 102776 ns 102779 ns 6813 BM_cyrillic_escaped 58977 ns 58975 ns 11868 BM_japanese_escaped 36885 ns 36886 ns 18975 BM_emoji_escaped 115885 ns 115881 ns 6051 ``` The first change is to manually encode the entire last area and make a manual exception for the 240 excluded entries. This reduced the table from 1077 to 729 entries and gave the following benchmark results. ``` ----------------------------------------------------------------------- Benchmark Time CPU Iterations ----------------------------------------------------------------------- BM_ascii_escaped 104777 ns 104776 ns 6550 BM_unicode_escaped 96980 ns 96982 ns 7238 BM_cyrillic_escaped 60254 ns 60251 ns 11670 BM_japanese_escaped 44452 ns 44452 ns 15734 BM_emoji_escaped 104557 ns 104551 ns 6685 BM_ascii_escaped 107456 ns 107454 ns 6505 BM_unicode_escaped 96219 ns 96216 ns 7301 BM_cyrillic_escaped 56921 ns 56904 ns 12288 BM_japanese_escaped 39530 ns 39529 ns 17492 BM_emoji_escaped 108494 ns 108496 ns 6408 ``` An entry in the table can only contain 2048 code points. For larger ranges there are multiple entries split in chunks with a maximum size of 2048 entries. To encode the entire Unicode code point range 21 bits are required. The manual part starts at 0x323B0 this means all entries in the table fit in 18 bits. This allows to allocate 3 additional bits for the range. This allows entries to have 16384 elements. This range always avoids splitting the range in multiple chunks. This reduces the number of table elements from 729 to 711 and gives the following benchmark results. ``` ----------------------------------------------------------------------- Benchmark Time CPU Iterations ----------------------------------------------------------------------- BM_ascii_escaped 104289 ns 104289 ns 6619 BM_unicode_escaped 96682 ns 96681 ns 7215 BM_cyrillic_escaped 59673 ns 59673 ns 11732 BM_japanese_escaped 41983 ns 41982 ns 16646 BM_emoji_escaped 104119 ns 104120 ns 6683 BM_ascii_escaped 104503 ns 104505 ns 6693 BM_unicode_escaped 93426 ns 93423 ns 7489 BM_cyrillic_escaped 54858 ns 54859 ns 12742 BM_japanese_escaped 36385 ns 36384 ns 19259 BM_emoji_escaped 105608 ns 105610 ns 6592 ``` List of files: /llvm-project/libcxx/include/format

316634ff5925481201a7b27d5f806cc2361cf4f2 - [libc++] Remove and includes from (#85520)

Fri, 29 Mar 2024 11:06:09 +0000

[libc++] Remove and includes from (#85520)This reduces the include time of from 691ms to 556ms. List of files: /llvm-project/libcxx/include/format

5bcb78141c628d9bd7a0b6e398858282c16038d3 - [libc++] Remove includes from (#85478)

Sat, 16 Mar 2024 12:45:24 +0000

[libc++] Remove includes from (#85478)This reduces the include time from 767ms to 691ms. List of files: /llvm-project/libcxx/include/format

087666811452e1b6490d59572337aaa907f93e7c - [libc++][NFC] Move __format/format_fwd.h to __fwd/format.h (#84336)

Fri, 08 Mar 2024 19:43:10 +0000

[libc++][NFC] Move __format/format_fwd.h to __fwd/format.h (#84336) List of files: /llvm-project/libcxx/include/format

37dca605c9bd41732da010ee97ed15ad9585a37d - [libc++] Clean up includes of <__assert> (#80091)

Thu, 29 Feb 2024 15:12:22 +0000

[libc++] Clean up includes of <__assert> (#80091)Originally, we used __libcpp_verbose_abort to handle assertion failures. That function was declared from all public headers. Since we don't use that mechanism anymore, we don't need to declare __libcpp_verbose_abort from all public headers, and we can clean up a lot of unnecessary includes. This patch also moves the definition of the various assertion categories to the <__assert> header, since we now rely on regular IWYU for these assertion macros. rdar://105510916 List of files: /llvm-project/libcxx/include/format

27e67cdb31bed4c346af925686c031d57aef9846 - Reland: [libc++][format] P2637R3: Member visit (std::basic_format_arg) #76449 (#79032)

Mon, 29 Jan 2024 18:57:12 +0000

Reland: [libc++][format] P2637R3: Member visit (std::basic_format_arg) #76449 (#79032)Deleted the offending test case. `libcxx/test/std/utilities/format/format.arguments/format.arg/visit.return_type.pass.cpp` lines: 134-135: > test(true, 192812079084L); test(false, 192812079084L); Relands: https://github.com/llvm/llvm-project/pull/76449 Reverted in: https://github.com/llvm/llvm-project/commit/02f95b77515fe18ed1076b94cbb850ea0cf3c77e --------- Co-authored-by: Zingam List of files: /llvm-project/libcxx/include/format

02f95b77515fe18ed1076b94cbb850ea0cf3c77e - Revert "[libc++][format] P2637R3: Member `visit` (`std::basic_format_arg`) (#76449)"

Mon, 22 Jan 2024 16:55:12 +0000

Revert "[libc++][format] P2637R3: Member `visit` (`std::basic_format_arg`) (#76449)"This reverts commit 7d9b5aa65b09126031e1c2903605a7d34aea4bc1 sincestd/utilities/format/format.arguments/format.arg/visit.return_type.pass.cppis failing on Windows when building with Clang-cl. List of files: /llvm-project/libcxx/include/format

7d9b5aa65b09126031e1c2903605a7d34aea4bc1 - [libc++][format] P2637R3: Member `visit` (`std::basic_format_arg`) (#76449)

Sun, 21 Jan 2024 10:30:25 +0000

[libc++][format] P2637R3: Member `visit` (`std::basic_format_arg`) (#76449)Implements parts of: `P2637R3` https://wg21.link/P2637R3 (https://eel.is/c++draft/variant.visit) Implements: `basic_format_arg.visit()` `basic_format_arg.visit()` Deprecates: `std::visit_format_arg()` The tests are as close as possible to the non-member function tests. To land after: https://github.com/llvm/llvm-project/pull/76447, https://github.com/llvm/llvm-project/pull/76268 --------- Co-authored-by: Zingam List of files: /llvm-project/libcxx/include/format

e3f154d8733928fa725584736a18b75832db30db - [libc++] Implements Runtime format strings. (#73353)

Sat, 09 Dec 2023 11:32:17 +0000

[libc++] Implements Runtime format strings. (#73353)This change requires quite a number of changes in the tests; this is not code I expect people to use in the wild. So I don't expect breakage for users. Implements: - P2905R2 Runtime format strings, as a Defect Report List of files: /llvm-project/libcxx/include/format

92d9f232dd627eea8bd2c825c539b28374bbfa69 - [libc++] Implements Runtime format strings II. (#72543)

Fri, 24 Nov 2023 16:30:33 +0000

[libc++] Implements Runtime format strings II. (#72543)Implements - P2918R2 Runtime format strings II List of files: /llvm-project/libcxx/include/format

dff62f5251f26db856124526ae1b335ddc1e892c - [libc++][format] Removes the experimental status.

Wed, 17 May 2023 17:17:52 +0000

[libc++][format] Removes the experimental status.The code has been quite ready for a while now and there are no more ABIbreaking papers. So this is a good time to mark the feature as stable.Reviewed By: #libc, ldionneDifferential Revision: https://reviews.llvm.org/D150802 List of files: /llvm-project/libcxx/include/format

04d4f4b3d4e4fd608a3bc3fe387006435f04b61d - [libc++][format] Adds container adaptor formatters.

Thu, 05 May 2022 16:57:32 +0000

[libc++][format] Adds container adaptor formatters.Implements parts of- P2286R8 Formatting RangesDepends on D140653Reviewed By: ldionne, #libcDifferential Revision: https://reviews.llvm.org/D141290 List of files: /llvm-project/libcxx/include/format

22e8525dfdd7d78d05ad3873cf94476021e4a08f - [libc++][format] Implements range_formatter

Thu, 05 May 2022 16:57:32 +0000

[libc++][format] Implements range_formatterImplements parts of- P2286R8 Formatting Ranges- P2585R0 Improving default container formattingDepends on D140651Reviewed By: ldionne, #libcDifferential Revision: https://reviews.llvm.org/D140653 List of files: /llvm-project/libcxx/include/format

eb6e13cb32805ee12d19aaa5823f3e4216a35653 - [libc++][format] Adds formatter for tuple and pair

Thu, 05 May 2022 16:57:32 +0000

[libc++][format] Adds formatter for tuple and pairImplements parts of- P2286R8 Formatting RangesReviewed By: ldionne, #libcDifferential Revision: https://reviews.llvm.org/D136775 List of files: /llvm-project/libcxx/include/format