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operator delete

The function called by a delete expression to deallocate storage for individual of objects.

void operator delete(
   void* _Ptr
) throw( );
void operator delete(
   void *, 
   void *
) throw( );
void operator delete(
   void* _Ptr,
   const std::nothrow_t&
) throw( );

Parameter

_Ptr
The pointer whose value is to be rendered invalid by the deletion.

Remarks

The first function is called by a delete expression to render the value of _Ptr invalid. The program can define a function with this function signature that replaces the default version defined by the Standard C++ Library. The required behavior is to accept a value of _Ptr that is null or that was returned by an earlier call to operator new(size_t).

The default behavior for a null value of _Ptr is to do nothing. Any other value of _Ptr must be a value returned earlier by a call as previously described. The default behavior for such a nonnull value of _Ptr is to reclaim storage allocated by the earlier call. It is unspecified under what conditions part or all of such reclaimed storage is allocated by a subsequent call to operator new(size_t), or to any of calloc(size_t), malloc(size_t), or realloc(void*, size_t).

The second function is called by a placement delete expression corresponding to a new expression of the form new(std::size_t). It does nothing.

The third function is called by a placement delete expression corresponding to a new expression of the form new(std::size_t, const std::nothrow_t&). The program can define a function with this function signature that replaces the default version defined by the Standard C++ Library. The required behavior is to accept a value of _Ptr that is null or that was returned by an earlier call to operator new(size_t). The default behavior is to evaluate delete(_Ptr).

Example

See operator new for an example that use operator delete.

See Also

<new> Members

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