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Add support formatting std::expected<void, E>

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Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
This commit is contained in:
Vladislav Shchapov
2024-09-03 21:44:10 +05:00
committed by Victor Zverovich
parent 1cc10ab68f
commit 22d50c1a9c
2 changed files with 6 additions and 2 deletions
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2
test/std-test.cc
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@ -140,6 +140,7 @@ TEST(std_test, optional) {
TEST(std_test, expected) {
#ifdef __cpp_lib_expected
EXPECT_EQ(fmt::format("{}", std::expected<void, int>{}), "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)");
@ -163,6 +164,7 @@ TEST(std_test, expected) {
EXPECT_FALSE(
(fmt::is_formattable<std::expected<int, unformattable2>>::value));
EXPECT_TRUE((fmt::is_formattable<std::expected<int, int>>::value));
EXPECT_TRUE((fmt::is_formattable<std::expected<void, int>>::value));
#endif
}