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Add some tests to ensure that the __regex_word does not conflict with any of ctype_base's values. 

Hopefully this will catch cases like https://llvm.org/bugs/show_bug.cgi?id=26476 in the future.

llvm-svn: 260527
This commit is contained in:
Marshall Clow 2016-02-11 15:23:04 +00:00
parent 8e39768c21
commit 9b66ab75fd
1 changed files with 13 additions and 0 deletions
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13
libcxx/test/std/re/re.traits/lookup_classname.pass.cpp
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@ -33,6 +33,19 @@ test(const char_type* A,
int main()
{
// if __regex_word is not distinct from all the classes, bad things happen
// See https://llvm.org/bugs/show_bug.cgi?id=26476 for an example.
assert((std::ctype_base::space & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::print & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::cntrl & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::upper & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::lower & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::alpha & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::digit & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::punct & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::xdigit & std::regex_traits<char>::__regex_word) == 0);
assert((std::ctype_base::blank & std::regex_traits<char>::__regex_word) == 0);
test("d", std::ctype_base::digit);
test("D", std::ctype_base::digit);
test("d", std::ctype_base::digit, true);