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Add xchar support for fmt::streamed().

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Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
This commit is contained in:
Vladislav Shchapov 2022-07-03 18:42:08 +05:00 committed by Victor Zverovich
parent c4ee726532
commit b31d1a75a0
2 changed files with 18 additions and 4 deletions
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9
include/fmt/ostream.h
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@ -142,12 +142,13 @@ struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
using ostream_formatter = basic_ostream_formatter<char>;
template <typename T>
struct formatter<detail::streamed_view<T>> : ostream_formatter {
template <typename T, typename Char>
struct formatter<detail::streamed_view<T>, Char>
: basic_ostream_formatter<Char> {
template <typename OutputIt>
auto format(detail::streamed_view<T> view,
basic_format_context<OutputIt, char>& ctx) const -> OutputIt {
return ostream_formatter::format(view.value, ctx);
basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
return basic_ostream_formatter<Char>::format(view.value, ctx);
}
};

13
test/xchar-test.cc
View File

@ -229,6 +229,19 @@ TEST(xchar_test, enum) {
EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));
}
struct streamable_and_unformattable {};
auto operator<<(std::wostream& os, streamable_and_unformattable)
-> std::wostream& {
return os << L"foo";
}
TEST(xchar_test, streamed) {
EXPECT_FALSE(fmt::is_formattable<streamable_and_unformattable>());
EXPECT_EQ(fmt::format(L"{}", fmt::streamed(streamable_and_unformattable())),
L"foo");
}
TEST(xchar_test, sign_not_truncated) {
wchar_t format_str[] = {
L'{', L':',