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Remove arithmetic +/-127 on chars; results in UB when dealing with signed chars. Thanks to STL@microsoft for the report.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@271897 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-06-06 14:35:22 +00:00
parent 2700619520
commit 10b452646a
1 changed files with 13 additions and 8 deletions
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15
test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
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@@ -18,11 +18,16 @@
int main() int main()
{ {
char c = '\0'; assert( std::char_traits<char>::lt('\0', 'A'));
assert(!std::char_traits<char>::lt('A', '\0'));
assert(!std::char_traits<char>::lt('a', 'a')); assert(!std::char_traits<char>::lt('a', 'a'));
assert( std::char_traits<char>::lt('A', 'a')); assert( std::char_traits<char>::lt('A', 'a'));
assert(!std::char_traits<char>::lt('A' + 127, 'a')); assert(!std::char_traits<char>::lt('a', 'A'));
assert(!std::char_traits<char>::lt('A' - 127, 'a'));
assert( std::char_traits<char>::lt('A', 'a' + 127)); assert( std::char_traits<char>::lt('a', 'z'));
assert( std::char_traits<char>::lt('A', 'a' - 127)); assert( std::char_traits<char>::lt('A', 'Z'));
assert( std::char_traits<char>::lt(' ', 'A'));
assert( std::char_traits<char>::lt('A', '~'));
} }