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Merge topic 'keys-and-values-helpers'

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ec2daddf47 cmext/algorithm: add helpers functions cm::keys and cm::values

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !11820
This commit is contained in:
Marc Chevrier
2026-03-15 08:06:03 +00:00
committed by Kitware Robot
parent 675a79713f ec2daddf47
commit bb5da66f1f
2 changed files with 90 additions and 0 deletions
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8
Help/dev/source.rst
View File

@@ -247,6 +247,14 @@ These are:
* ``cm::contains``:
Checks if element or key is contained in container.
* ``cm::keys``
Extract keys from associative container or sequence container with tuple as
element
* ``cm::values``
Extract values from associative container or sequence container with tuple as
element
* ``<cmext/enum_set>``
* ``cm::enum_set``:

82
Utilities/std/cmext/algorithm
View File

@@ -10,6 +10,7 @@
#include <memory>
#include <utility>
#include <cm/ranges>
#include <cm/type_traits>
#include <cmext/iterator>
#include <cmext/type_traits>
@@ -251,4 +252,85 @@ bool contains(Range const& range, Key const& key)
}
#endif
template <
typename Range,
cm::enable_if_t<cm::is_associative_container<Range>::value ||
cm::is_unordered_associative_container<Range>::value,
int> = 0>
std::vector<typename Range::key_type> keys(Range const& range)
{
#if defined(CMake_HAVE_CXX_RANGES)
# if __cplusplus >= 202302L || (defined(_MSVC_LANG) && _MSVC_LANG >= 202302L)
return std::vector<std::string_view>{ std::from_range,
std::views::keys(range) };
# else
auto view = std::views::keys(range);
return std::vector<std::string_view>{ view.begin(), view.end() };
# endif
#else
return cm::views::keys(range);
#endif
}
template <
typename Range,
cm::enable_if_t<cm::is_associative_container<Range>::value ||
cm::is_unordered_associative_container<Range>::value,
int> = 0>
std::vector<typename Range::mapped_type> values(Range const& range)
{
#if defined(CMake_HAVE_CXX_RANGES)
# if __cplusplus >= 202302L || (defined(_MSVC_LANG) && _MSVC_LANG >= 202302L)
return std::vector<std::string_view>{ std::from_range,
std::views::values(range) };
# else
auto view = std::views::values(range);
return std::vector<std::string_view>{ view.begin(), view.end() };
# endif
#else
return cm::views::values(range);
#endif
}
// sequence containers with std::pair<> or std::tuple<> as elements
template <typename Range,
cm::enable_if_t<cm::is_sequence_container<Range>::value &&
cm::is_tuple<1, typename Range::value_type>::value,
int> = 0>
std::vector<typename std::tuple_element<0, typename Range::value_type>::type>
keys(Range const& range)
{
#if defined(CMake_HAVE_CXX_RANGES)
# if __cplusplus >= 202302L || (defined(_MSVC_LANG) && _MSVC_LANG >= 202302L)
return std::vector<std::string_view>{ std::from_range,
std::views::keys(range) };
# else
auto view = std::views::keys(range);
return std::vector<std::string_view>{ view.begin(), view.end() };
# endif
#else
return cm::views::keys(range);
#endif
}
template <typename Range,
cm::enable_if_t<cm::is_sequence_container<Range>::value &&
cm::is_tuple<2, typename Range::value_type>::value,
int> = 0>
std::vector<typename std::tuple_element<1, typename Range::value_type>::type>
keys(Range const& range)
{
#if defined(CMake_HAVE_CXX_RANGES)
# if __cplusplus >= 202302L || (defined(_MSVC_LANG) && _MSVC_LANG >= 202302L)
return std::vector<std::string_view>{ std::from_range,
std::views::values(range) };
# else
auto view = std::views::values(range);
return std::vector<std::string_view>{ view.begin(), view.end() };
# endif
#else
return cm::views::values(range);
#endif
}
} // namespace cm