[basic.stc.dynamic.general] (original) (raw)

A C++ implementation provides access to, and management of, dynamic storage via the global allocation functions operator new andoperator new[] and the global deallocation functions operator delete andoperator delete[].

[Note 1:

The non-allocating forms described in [new.delete.placement]do not perform allocation or deallocation.

— _end note_]

The library provides default definitions for the global allocation and deallocation functions.

Some global allocation and deallocation functions are replaceable ([dcl.fct.def.replace]).

The following allocation and deallocation functions ([support.dynamic]) are implicitly declared in global scope in each translation unit of a program.

void* operator new(std::size_t);void* operator new(std::size_t, std::align_val_t);void operator delete(void*) noexcept;void operator delete(void*, std::size_t) noexcept;void operator delete(void*, std::align_val_t) noexcept;void operator delete(void*, std::size_t, std::align_val_t) noexcept;void* operator new[](std::size_t);void* operator new[](std::size_t, std::align_val_t);void operator delete[](void*) noexcept;void operator delete[](void*, std::size_t) noexcept;void operator delete[](void*, std::align_val_t) noexcept;void operator delete[](void*, std::size_t, std::align_val_t) noexcept;

These implicit declarations introduce only the function namesoperator new,operator new[],operator delete, andoperator delete[].

[Note 2:

The implicit declarations do not introduce the names std,std​::​size_t,std​::​align_val_t, or any other names that the library uses to declare these names.

Thus, a new-expression,delete-expression, or function call that refers to one of these functions without importing or including the header or importing a C++ library module ([std.modules]) is well-formed.

— _end note_]

Allocation and/or deallocation functions may also be declared and defined for any class ([class.free]).