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<new> Header - C++
< c++‎ | std

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[edit]

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[edit]

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[edit]

Type Description Since
nothrow nothrow constant C++98

Types[edit]

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

Synopsis[edit]

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;