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template <class T>
struct is_reference : public true_type-or-false_type {};
Inherits: If T is a reference type (either an lvalue reference or an rvalue reference) then inherits from true_type, otherwise inherits from false_type.
C++ Standard Reference: 3.9.2 and 8.3.2.
Compiler Compatibility: All current compilers are supported by this trait.
Header: #include
<boost/type_traits/is_reference.hpp>
or #include <boost/type_traits.hpp>
Examples:
is_reference<int&>inherits fromtrue_type.
is_reference<int const&>::typeis the typetrue_type.
is_reference<int const&&>::typeis the typetrue_type.
is_reference<int (&)(long)>::valueis an integral constant expression that evaluates to true (the argument in this case is a reference to a function).
is_reference<T>::value_typeis the typebool.