common_view() = default;
constexpr explicit common_view( V r );
base()returns a copy of
|r||-||underlying view to be adapted into a common-range|
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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