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Simplify join_view formatter

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This commit is contained in:
Victor Zverovich
2024-05-08 15:19:19 -07:00
parent 328d256c60
commit d2473b7b73
2 changed files with 33 additions and 45 deletions
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40
test/ranges-test.cc
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@@ -667,14 +667,14 @@ TEST(ranges_test, lvalue_qualified_begin_end) {
#if ENABLE_INPUT_RANGE_JOIN_TEST
TEST(ranges_test, input_range_join) {
std::istringstream iss("1 2 3 4 5");
auto iss = std::istringstream("1 2 3 4 5");
auto view = std::views::istream<std::string>(iss);
auto joined_view = fmt::join(view.begin(), view.end(), ", ");
EXPECT_EQ("1, 2, 3, 4, 5", fmt::format("{}", std::move(joined_view)));
EXPECT_EQ("1, 2, 3, 4, 5",
fmt::format("{}", fmt::join(view.begin(), view.end(), ", ")));
}
TEST(ranges_test, input_range_join_overload) {
std::istringstream iss("1 2 3 4 5");
auto iss = std::istringstream("1 2 3 4 5");
EXPECT_EQ(
"1.2.3.4.5",
fmt::format("{}", fmt::join(std::views::istream<std::string>(iss), ".")));
@@ -682,26 +682,26 @@ TEST(ranges_test, input_range_join_overload) {
#endif
TEST(ranges_test, std_istream_iterator_join) {
std::istringstream iss("1 2 3 4 5");
std::istream_iterator<int> first{iss};
std::istream_iterator<int> last{};
auto joined_view = fmt::join(first, last, ", ");
EXPECT_EQ("1, 2, 3, 4, 5", fmt::format("{}", std::move(joined_view)));
auto&& iss = std::istringstream("1 2 3 4 5");
auto first = std::istream_iterator<int>(iss);
auto last = std::istream_iterator<int>();
EXPECT_EQ("1, 2, 3, 4, 5", fmt::format("{}", fmt::join(first, last, ", ")));
}
TEST(ranges_test, movable_only_istream_iter_join) {
// Mirrors c++20 std::ranges::basic_istream_view::iterator
struct UncopyableIstreamIter : std::istream_iterator<int> {
explicit UncopyableIstreamIter(std::istringstream& iss)
// Mirrors C++20 std::ranges::basic_istream_view::iterator.
struct noncopyable_istream_iterator : std::istream_iterator<int> {
explicit noncopyable_istream_iterator(std::istringstream& iss)
: std::istream_iterator<int>{iss} {}
UncopyableIstreamIter(const UncopyableIstreamIter&) = delete;
UncopyableIstreamIter(UncopyableIstreamIter&&) = default;
noncopyable_istream_iterator(const noncopyable_istream_iterator&) = delete;
noncopyable_istream_iterator(noncopyable_istream_iterator&&) = default;
};
static_assert(!std::is_copy_constructible<UncopyableIstreamIter>::value, "");
static_assert(
!std::is_copy_constructible<noncopyable_istream_iterator>::value, "");
std::istringstream iss("1 2 3 4 5");
UncopyableIstreamIter first{iss};
std::istream_iterator<int> last{};
auto joined_view = fmt::join(std::move(first), last, ", ");
EXPECT_EQ("1, 2, 3, 4, 5", fmt::format("{}", std::move(joined_view)));
auto&& iss = std::istringstream("1 2 3 4 5");
auto first = noncopyable_istream_iterator(iss);
auto last = std::istream_iterator<int>();
EXPECT_EQ("1, 2, 3, 4, 5",
fmt::format("{}", fmt::join(std::move(first), last, ", ")));
}