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std::ranges::common_view<V>::common_view

common_view() = default;
 (1) (since C++20) 
constexpr explicit common_view( V r );
 (2) (since C++20)

Constructs a common_view.

1) Default constructor. Value-initializes the underlying view. After construction, base() returns a copy of V().
2) Initializes the underlying view with std::move(r).

Parameters

r - underlying view to be adapted into a common-range

Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3405 C++20 the redundant converting constructor might cause constraint recursion removed

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