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_scalar : public true_type-or-false_type {};
Inherits: If T is a (possibly cv-qualified) scalar type then inherits from true_type, otherwise inherits from false_type. Scalar types include integral, floating point, enumeration, pointer, and pointer-to-member types.
C++ Standard Reference: 3.9p10.
Header: #include
<boost/type_traits/is_scalar.hpp>
or #include <boost/type_traits.hpp>
Compiler Compatibility: All current compilers are supported by this trait.
Examples:
is_scalar<int*>inherits fromtrue_type.
is_scalar<int>::typeis the typetrue_type.
is_scalar<double>::valueis an integral constant expression that evaluates to true.
is_scalar<int (*)(long)>::valueis an integral constant expression that evaluates to true.
is_scalar<int (MyClass::*)(long)>::valueis an integral constant expression that evaluates to true.
is_scalar<int (MyClass::*)>::valueis an integral constant expression that evaluates to true.
is_scalar<T>::value_typeis the typebool.