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Implement fmt::join for tuple-like objects (#4230)

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Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
This commit is contained in:
Vladislav Shchapov
2024-11-09 21:28:46 +05:00
committed by GitHub
parent 542600013f
commit 5a3576acc8
3 changed files with 34 additions and 24 deletions
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9
test/ranges-test.cc
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@@ -213,7 +213,8 @@ TEST(ranges_test, tuple_parse_calls_element_parse) {
EXPECT_THROW(f.parse(ctx), bad_format);
}
#ifdef FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
#if defined(FMT_RANGES_TEST_ENABLE_JOIN) || \
defined(FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT)
struct tuple_like {
int i;
std::string str;
@@ -241,7 +242,9 @@ template <size_t N> struct tuple_element<N, tuple_like> {
using type = decltype(std::declval<tuple_like>().get<N>());
};
} // namespace std
#endif
#ifdef FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
TEST(ranges_test, format_struct) {
auto t = tuple_like{42, "foo"};
EXPECT_EQ(fmt::format("{}", t), "(42, \"foo\")");
@@ -420,6 +423,10 @@ TEST(ranges_test, join_tuple) {
auto t4 = std::tuple<float>(4.0f);
EXPECT_EQ(fmt::format("{}", fmt::join(t4, "/")), "4");
// Tuple-like.
auto t5 = tuple_like{42, "foo"};
EXPECT_EQ(fmt::format("{}", fmt::join(t5, ", ")), "42, foo");
# if FMT_TUPLE_JOIN_SPECIFIERS
// Specs applied to each element.
auto t5 = std::tuple<int, int, long>(-3, 100, 1);