std::ranges::common_range
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Defined in header
<ranges>
template< class T >
(since C++20)
concept common_range =
The common_range concept is a refinement of range for which std::ranges::begin() and std::ranges::end() return the same type (e.g. all standard library containers).
[edit] Example
Run this code
#include <ranges> struct A { char* begin(); char* end(); }; static_assert( std::ranges::common_range<A> ); struct B { char* begin(); bool end(); }; // not a common_range: begin/end have different types static_assert( not std::ranges::common_range<B> ); struct C { char* begin(); }; // not a common_range, not even a range: has no end() static_assert( not std::ranges::common_range<C> ); int main() {}