std::ranges::common_range - cppreference.com

From cppreference.com


`template< class T > concept common_range = ranges::range<T> && std::same_as<ranges::iterator_t<T>, ranges::sentinel_t<T>>;`		(since C++20)

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).

Example

#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() {}

Example

See also