Move the test for zero-length into the char_traits (from string_view). Add tests to char_traits specializations
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@228981 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -19,6 +19,7 @@
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int main()
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{
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assert(std::char_traits<char>::compare("", "", 0) == 0);
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assert(std::char_traits<char>::compare(NULL, NULL, 0) == 0);
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assert(std::char_traits<char>::compare("1", "1", 1) == 0);
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assert(std::char_traits<char>::compare("1", "2", 1) < 0);
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@@ -21,6 +21,7 @@ int main()
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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#if __cplusplus >= 201103L
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assert(std::char_traits<char16_t>::compare(u"", u"", 0) == 0);
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assert(std::char_traits<char16_t>::compare(NULL, NULL, 0) == 0);
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assert(std::char_traits<char16_t>::compare(u"1", u"1", 1) == 0);
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assert(std::char_traits<char16_t>::compare(u"1", u"2", 1) < 0);
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@@ -21,6 +21,7 @@ int main()
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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#if __cplusplus >= 201103L
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assert(std::char_traits<char32_t>::compare(U"", U"", 0) == 0);
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assert(std::char_traits<char32_t>::compare(NULL, NULL, 0) == 0);
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assert(std::char_traits<char32_t>::compare(U"1", U"1", 1) == 0);
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assert(std::char_traits<char32_t>::compare(U"1", U"2", 1) < 0);
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@@ -19,6 +19,7 @@
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int main()
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{
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assert(std::char_traits<wchar_t>::compare(L"", L"", 0) == 0);
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assert(std::char_traits<wchar_t>::compare(NULL, NULL, 0) == 0);
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assert(std::char_traits<wchar_t>::compare(L"1", L"1", 1) == 0);
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assert(std::char_traits<wchar_t>::compare(L"1", L"2", 1) < 0);
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