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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.