std::function::operator bool

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C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Utilities library
Function objects
std::function
Member functions function::function function::~function function::operator= function::swap function::assign function::operator bool function::operator() function::target_type function::target Non-member functions operator== operator!= std::swap(std::function) Helper classes std::uses_allocator<std::function>

explicit operator bool() const;		(since C++11)

Checks whether the stored callable object is valid.

[edit] Parameters

(none)

[edit] Return value

true if the stored callable object is valid, false otherwise.

[edit] Exceptions