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template <class T> struct has_trivial_copy : publictrue_type-or-false_type{}; template <class T> struct has_trivial_copy_constructor : publictrue_type-or-false_type{};
Inherits: If T is a (possibly cv-qualified) type with a trivial copy-constructor then inherits from true_type, otherwise inherits from false_type.
These two traits are synonyms for each other.
        If a type has a trivial copy-constructor then the constructor has the same
        effect as copying the bits of one object to the other: calls to the constructor
        can be safely replaced with a call to memcpy.
      
        Compiler Compatibility: Without some (as
        yet unspecified) help from the compiler, has_trivial_copy will never report
        that a user-defined class or struct has a trivial constructor; this is always
        safe, if possibly sub-optimal. In addition, in order to correctly handle
        deleted or private copy-constructors then C++11's dectype
        is required. Currently (May 2015) compilers more recent than Visual C++ 8,
        GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear have the necessary compiler
        intrinsics to ensure that
        this trait "just works". You may also test to see if the necessary
        intrinsics are available
        by checking to see if the macro BOOST_HAS_TRIVIAL_COPY
        is defined.
      
C++ Standard Reference: 12.8p6.
        Header:  #include
        <boost/type_traits/has_trivial_copy.hpp>
        or  #include <boost/type_traits.hpp>
      
Examples:
has_trivial_copy<int>inherits fromtrue_type.
has_trivial_copy<char*>::typeis the typetrue_type.
has_trivial_copy<int (*)(long)>::valueis an integral constant expression that evaluates to true.
has_trivial_copy<MyClass>::valueis an integral constant expression that evaluates to false.
has_trivial_copy<T>::value_typeis the typebool.