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template <class T>
struct is_integral : public true_type-or-false_type {};
Inherits: If T is a (possibly cv-qualified) integral type then inherits from true_type, otherwise inherits from false_type.
C++ Standard Reference: 3.9.1p7.
Compiler Compatibility: All current compilers are supported by this trait.
        Header:  #include
        <boost/type_traits/is_integral.hpp>
        or  #include <boost/type_traits.hpp>
      
Examples:
is_integral<int>inherits fromtrue_type.
is_integral<const char>::typeis the typetrue_type.
is_integral<long>::valueis an integral constant expression that evaluates to true.
is_integral<T>::value_typeis the typebool.