23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.13 Polymorphic function wrappers [func.wrap]

23.14.13.1 Class bad_­function_­call [func.wrap.badcall]

23.14.13.1.1 bad_­function_­call constructor [func.wrap.badcall.const]

bad_function_call() noexcept;

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Effects: Constructs a bad_­function_­call object.

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Postconditions: what() returns an implementation-defined ntbs.