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Add static_asserts to basic_ios and basic_stream_buf to ensure that that the traits match the character type. This is a requirement on the user - now we get consistent failures at compile time instead of incomprehensible error messages or runtime failures. This is also LWG#2994 - not yet adopted.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@323945 91177308-0d34-0410-b5e6-96231b3b80d8
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Marshall Clow
2018-02-01 03:55:27 +00:00
parent 37e4c9b159
commit 75075c6be0
7 changed files with 139 additions and 0 deletions
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26
test/libcxx/input.output/string.streams/traits_mismatch.fail.cpp Normal file
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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <sstream>
// template<class charT, class traits = char_traits<charT>,
// class Allocator = allocator<charT>>
// class basic_stringbuf;
//
// The char type of the stream and the char_type of the traits have to match
#include <sstream>
int main()
{
std::basic_stringbuf<char, std::char_traits<wchar_t> > sb;
// expected-error-re@streambuf:* {{static_assert failed{{.*}} "traits_type::char_type must be the same type as CharT"}}
// expected-error-re@string:* {{static_assert failed{{.*}} "traits_type::char_type must be the same type as CharT"}}
}