Skip to content

P3060R3 Add std::views::indices(n) #8006

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
merged 1 commit into from
Jul 16, 2025
Merged

P3060R3 Add std::views::indices(n) #8006

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
16 changes: 15 additions & 1 deletion source/ranges.tex
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -218,7 +218,10 @@
template<class W, class Bound>
constexpr bool @\libspec{enable_borrowed_range}{iota_view}@<iota_view<W, Bound>> = true;

namespace views { inline constexpr @\unspecnc@ iota = @\unspecnc@; }
namespace views {
inline constexpr @\unspecnc@ iota = @\unspecnc@;
inline constexpr @\unspecnc@ indices = @\unspecnc@;
}

// \ref{range.repeat}, repeat view
template<@\libconcept{move_constructible}@ T, @\libconcept{semiregular}@ Bound = unreachable_sentinel_t>
Expand Down Expand Up @@ -2802,6 +2805,17 @@
\end{codeblock}
\end{example}

\pnum
\indexlibrarymember{indices}{views}%
The name \tcode{views::indices} denotes a
customization point object\iref{customization.point.object}.
Given subexpression \tcode{E},
let \tcode{T} be \tcode{remove_cvref_t<decltype((E))>}.
\tcode{views::indices(E)} is expression-equivalent to
\tcode{views::iota(T(0), E)}
if \tcode{\exposid{is-integer-like}<T>} is \tcode{true},
and ill-formed otherwise.

\rSec3[range.iota.view]{Class template \tcode{iota_view}}

\indexlibraryglobal{iota_view}%
Expand Down
1 change: 1 addition & 0 deletions source/support.tex
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -794,6 +794,7 @@
#define @\defnlibxname{cpp_lib_ranges_find_last}@ 202207L // also in \libheader{algorithm}
#define @\defnlibxname{cpp_lib_ranges_fold}@ 202207L // also in \libheader{algorithm}
#define @\defnlibxname{cpp_lib_ranges_generate_random}@ 202403L // also in \libheader{random}
#define @\defnlibxname{cpp_lib_ranges_indices}@ 202506L // also in \libheader{ranges}
#define @\defnlibxname{cpp_lib_ranges_iota}@ 202202L // also in \libheader{numeric}
#define @\defnlibxname{cpp_lib_ranges_join_with}@ 202202L // freestanding, also in \libheader{ranges}
#define @\defnlibxname{cpp_lib_ranges_repeat}@ 202207L // freestanding, also in \libheader{ranges}
Expand Down