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llvm-project/libcxx/include/experimental/string_view

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Implement string_view from the library fundamentals TS (n4023). Also works in C++11 and 03, with reduced functionality (mostly in the area of constexpr) llvm-svn: 210659
2014-06-12 00:44:55 +08:00
// -*- C++ -*-
//===------------------------ string_view ---------------------------------===//
//
Update more file headers across all of the LLVM projects in the monorepo to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
2019-01-19 18:56:40 +08:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Implement string_view from the library fundamentals TS (n4023). Also works in C++11 and 03, with reduced functionality (mostly in the area of constexpr) llvm-svn: 210659
2014-06-12 00:44:55 +08:00
//
//===----------------------------------------------------------------------===//
Fix PR39749 - Headers containing just #error harm __has_include. This patch changes <experimental/foo> to use #warning instead of is harmful to common feature detection idioms. We should also consider only emitting the warning when __DEPRECATED is defined, like we do in the <ext/foo> headers. Users may want to specify "-Werror=-W#warnings" while still ignoring the libc++ warnings. llvm-svn: 350485
2019-01-06 08:37:31 +08:00
#ifndef _LIBCPP_EXPERIMENTAL_STRING_VIEW
#define _LIBCPP_EXPERIMENTAL_STRING_VIEW
Implement string_view from the library fundamentals TS (n4023). Also works in C++11 and 03, with reduced functionality (mostly in the area of constexpr) llvm-svn: 210659
2014-06-12 00:44:55 +08:00
Fix PR39749 - Headers containing just #error harm __has_include. This patch changes <experimental/foo> to use #warning instead of is harmful to common feature detection idioms. We should also consider only emitting the warning when __DEPRECATED is defined, like we do in the <ext/foo> headers. Users may want to specify "-Werror=-W#warnings" while still ignoring the libc++ warnings. llvm-svn: 350485
2019-01-06 08:37:31 +08:00
#include <__config>
#ifdef _LIBCPP_WARNING
_LIBCPP_WARNING("<experimental/string_view> has been removed. Use <string_view> instead.")
#else
# warning "<experimental/string_view> has been removed. Use <string_view> instead."
#endif
#endif // _LIBCPP_EXPERIMENTAL_STRING_VIEW