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Fix handling of enums in to_string (#2036)

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This commit is contained in:
Victor Zverovich 2020-12-03 15:03:19 -08:00
parent aabe0a8473
commit 33f9a6d360
2 changed files with 11 additions and 0 deletions
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8
include/fmt/format.h
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@ -2111,6 +2111,14 @@ FMT_CONSTEXPR OutputIt write(OutputIt out, T value) {
return base_iterator(out, it);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_enum<T>::value &&
!std::is_same<T, Char>::value)>
FMT_CONSTEXPR OutputIt write(OutputIt out, T value) {
return write<Char>(
out, static_cast<typename std::underlying_type<T>::type>(value));
}
template <typename Char, typename OutputIt>
constexpr OutputIt write(OutputIt out, bool value) {
return write<Char>(out, string_view(value ? "true" : "false"));

3
test/format-test.cc
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@ -1987,6 +1987,9 @@ TEST(FormatTest, ToString) {
EXPECT_EQ("42", fmt::to_string(42));
EXPECT_EQ("0x1234", fmt::to_string(reinterpret_cast<void*>(0x1234)));
EXPECT_EQ("foo", fmt::to_string(adl_test::fmt::detail::foo()));
enum test_enum : unsigned char { test_value };
EXPECT_EQ("0", fmt::to_string(test_value));
}
TEST(FormatTest, ToWString) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }