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added formatter for std::expected (#3834)

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This commit is contained in:
Dominic Pöschko
2024-02-03 18:06:15 +01:00
committed by GitHub
parent 9f5f39cb50
commit e5bab8dab4
2 changed files with 75 additions and 11 deletions
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20
test/std-test.cc
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@ -102,6 +102,26 @@ TEST(std_test, optional) {
#endif
}
TEST(std_test, expected) {
#ifdef __cpp_lib_expected
EXPECT_EQ(fmt::format("{}", std::expected<int, int>{1}), "expected(1)");
EXPECT_EQ(fmt::format("{}", std::expected<int, int>{std::unexpected(1)}), "unexpected(1)");
EXPECT_EQ(fmt::format("{}", std::expected<std::string, int>{"test"}), "expected(\"test\")");
EXPECT_EQ(fmt::format("{}", std::expected<int, std::string>{std::unexpected("test")}), "unexpected(\"test\")");
EXPECT_EQ(fmt::format("{}", std::expected<char, int>{'a'}), "expected('a')");
EXPECT_EQ(fmt::format("{}", std::expected<int, char>{std::unexpected('a')}), "unexpected('a')");
struct unformattable1 {};
struct unformattable2 {};
EXPECT_FALSE((fmt::is_formattable<unformattable1>::value));
EXPECT_FALSE((fmt::is_formattable<unformattable2>::value));
EXPECT_FALSE((fmt::is_formattable<std::expected<unformattable1, unformattable2>>::value));
EXPECT_FALSE((fmt::is_formattable<std::expected<unformattable1, int>>::value));
EXPECT_FALSE((fmt::is_formattable<std::expected<int, unformattable2>>::value));
EXPECT_TRUE((fmt::is_formattable<std::expected<int, int>>::value));
#endif
}
namespace my_nso {
enum class my_number {
one,