The header <new> defines several functions that can be used to manage dynamic storage in C++ as part of the C++ Standard Library. This header provides a relatively low-level memory facilities. In addition to declaring a set of functions within the std namespace, several other functions are defined within the global namespace.

Functions

Function	Description	Since
operator new	allocation functions	C++98
operator new[]		C++98
operator delete	deallocation functions	C++98
operator delete[]		C++98
get_new_handler	retrieves the current new handler	C++11
set_new_handler	registers a new handler	C++11

Classes

Class	Description	Since
bad_alloc	thrown during a failure of memory allocation	C++98
bad_array_new_length	thrown on invalid length allocation	C++11
nothrow_t	nothrow type	C++98

Objects

Type	Description	Since
nothrow	nothrow constant	C++98

Types

Type	Description	Since
new_handler	type of a new handler function	C++98

Synopsis

namespace std {
    class bad_alloc;
    class bad_array_new_length;
    struct nothrow_t {};
    extern const nothrow_t nothrow;
    typedef void (*new_handler)();
    new_handler get_new_handler() noexcept;
    new_handler set_new_handler(new_handler new_p) noexcept;
}

void* operator new(std::size_t size);
void* operator new(std::size_t size, const std::nothrow_t&) noexcept;
void  operator delete(void* ptr) noexcept;
void  operator delete(void* ptr, const std::nothrow_t&) noexcept;
void* operator new[](std::size_t size);
void* operator new[](std::size_t size, const std::nothrow_t&) noexcept;
void  operator delete[](void* ptr) noexcept;
void  operator delete[](void* ptr, const std::nothrow_t&) noexcept;
void* operator new (std::size_t size, void* ptr) noexcept;
void* operator new[](std::size_t size, void* ptr) noexcept;
void  operator delete (void* ptr, void*) noexcept;
void  operator delete[](void* ptr, void*) noexcept;