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Make is_constructible public (#918)

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This commit is contained in:
Victor Zverovich
2018-10-27 17:10:19 -07:00
parent 4373153800
commit ccd3e8bbf3
3 changed files with 50 additions and 49 deletions
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40
test/core-test.cc
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@@ -569,3 +569,43 @@ TEST(CoreTest, FormatForeignStrings) {
EXPECT_EQ(fmt::format(QString(L"{}"), my_string<wchar_t>(L"42")), L"42");
EXPECT_EQ(fmt::format(my_string<wchar_t>(L"{}"), QString(L"42")), L"42");
}
struct implicitly_convertible_to_string_view {
operator fmt::string_view() const { return "foo"; }
};
TEST(FormatterTest, FormatImplicitlyConvertibleToStringView) {
EXPECT_EQ("foo", fmt::format("{}", implicitly_convertible_to_string_view()));
}
// std::is_constructible is broken in MSVC until version 2015.
#if FMT_USE_EXPLICIT && (!FMT_MSC_VER || FMT_MSC_VER >= 1900)
struct explicitly_convertible_to_string_view {
explicit operator fmt::string_view() const { return "foo"; }
};
TEST(FormatterTest, FormatExplicitlyConvertibleToStringView) {
EXPECT_EQ("foo", fmt::format("{}", explicitly_convertible_to_string_view()));
}
struct explicitly_convertible_to_wstring_view {
explicit operator fmt::wstring_view() const { return L"foo"; }
};
TEST(FormatterTest, FormatExplicitlyConvertibleToWStringView) {
EXPECT_EQ(L"foo",
fmt::format(L"{}", explicitly_convertible_to_wstring_view()));
}
struct explicitly_convertible_to_string_like {
template <
typename String,
typename = typename std::enable_if<
std::is_constructible<String, const char*, std::size_t>::value>::type>
FMT_EXPLICIT operator String() const { return String("foo", 3u); }
};
TEST(FormatterTest, FormatExplicitlyConvertibleToStringLike) {
EXPECT_EQ("foo", fmt::format("{}", explicitly_convertible_to_string_like()));
}
#endif