std::ranges::common_range - cppreference.com (original) (raw)
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
#include struct A { char* begin(); char* end(); }; static_assert( std::ranges::common_range ); struct B { char* begin(); bool end(); }; // not a common_range: begin/end have different types static_assert( not std::ranges::common_range ); struct C { char* begin(); }; // not a common_range, not even a range: has no end() static_assert( not std::ranges::common_range ); int main() {}