Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
template <class T>
struct is_lvalue_reference : public true_type-or-false_type {};
Inherits: If T is an lvalue reference type 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_lvalue_reference.hpp>
or #include <boost/type_traits.hpp>
Examples:
is_lvalue_reference<int&>inherits fromtrue_type.
is_lvalue_reference<int const&>::typeis the typetrue_type.
is_lvalue_reference<int const&&>::typeis the typefalse_type.
is_lvalue_reference<int (&)(long)>::valueis an integral constant expression that evaluates to true (the argument in this case is a reference to a function).
is_lvalue_reference<T>::value_typeis the typebool.