key_value_pair::key
Return the key of this element.
Synopsis
string_view const
key() const noexcept;Description
After construction, the key may not be modified.
Complexity
Constant.
Exception Safety
No-throw guarantee.
key_value_pair::keyReturn the key of this element.
string_view const
key() const noexcept;After construction, the key may not be modified.
Constant.
No-throw guarantee.