[libc++][C++17] Elementary string conversions for integral types

Summary:
Major QoI considerations:

- The facility is backported to C++14, same as libstdc++.
- Efforts have been made to minimize the header dependencies.
- The design is friendly to the uses of MSVC intrinsics (`__emulu`, `_umul128`, `_BitScanForward`, `_BitScanForward64`) but not implemented; future contributions are welcome.

Thanks to Milo Yip for contributing the implementation of `__u64toa` and `__u32toa`.

References:
 https://wg21.link/p0067r5
 https://wg21.link/p0682r1

Reviewers: mclow.lists, EricWF

Reviewed By: mclow.lists

Subscribers: ldionne, Quuxplusone, christof, mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D41458

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@338479 91177308-0d34-0410-b5e6-96231b3b80d8

This commit is contained in:

Zhihao Yuan

2018-08-01 02:38:30 +00:00

parent 6952d1478d

commit dc38e97601

10 changed files with 1402 additions and 0 deletions

									
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test/libcxx/double_include.sh.cpp
									
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				@@ -34,6 +34,7 @@

				#include <cerrno>

				#include <cfenv>

				#include <cfloat>

				#include <charconv>

				#include <chrono>

				#include <cinttypes>

				#include <ciso646>

[libc++][C++17] Elementary string conversions for integral types

1 test/libcxx/double_include.sh.cpp Unescape Escape View File

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test/libcxx/double_include.sh.cpp

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