Skip to content

📚 Fix docs for apply_sequence #318

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
elbeno merged 1 commit into from
Jan 21, 2026
Merged

📚 Fix docs for apply_sequence #318

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 4 additions & 4 deletions docs/type_traits.adoc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -47,11 +47,11 @@ template with no runtime arguments is called with the pack of arguments.
----
using L1 = stdx::type_list<std::integral_constant<int, 1>,
std::integral_constant<int, 2>>;
int x = stdx::apply_sequence<L1>([&] <typename... Ts> () { return (0 + ... + Ts::value); });
int x = stdx::apply_sequence<L1>([] <typename... Ts> () { return (0 + ... + Ts::value); });
// x is 3

using L2 = stdx::value_list<1, 2>;
int y = stdx::apply_sequence<L2>([&] <auto... Vs> () { return (0 + ... + Vs); });
int y = stdx::apply_sequence<L2>([] <auto... Vs> () { return (0 + ... + Vs); });
// y is 3
----

Expand All @@ -61,8 +61,8 @@ https://en.cppreference.com/w/cpp/utility/integer_sequence[`std::integer_sequenc
[source,cpp]
----
using L3 = stdx::make_index_sequence<3>;
auto y = stdx::apply_sequence<L3>([&] <auto... Vs> () { y += V; });
// y is 3
auto y = stdx::apply_sequence<L3>([] <auto... Vs> () { return (0 + ... + Vs); });
// y is 3 (a std::size_t)
----

NOTE: If the function iterates the pack by folding over `operator,` then
Expand Down
2 changes: 2 additions & 0 deletions test/type_traits.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -166,6 +166,8 @@ TEST_CASE("apply_sequence with value list", "[type_traits]") {
TEST_CASE("apply_sequence with index sequence", "[type_traits]") {
using L = std::make_index_sequence<3>;
CHECK(stdx::apply_sequence<L>(add_values{}) == 3);
STATIC_CHECK(std::is_same_v<decltype(stdx::apply_sequence<L>(add_values{})),
std::size_t>);
}

TEST_CASE("is_same_unqualified", "[type_traits]") {
Expand Down