devxlogo

User-Defined New and Delete Cannot be Declared in a Namespace

User-Defined New and Delete Cannot be Declared in a Namespace

Operators new and delete can be declared in a class scope. However, the Standard prohibits declarations of these operators in a namespace. Why is this? Consider the following example:

 char *pc; namespace A { void operator new ( size_t ); void operator delete ( void * );void func () {	  pc = new char ( 'a');}}void f() { delete pc; } // which version of delete to call, A::delete or standard delete? 

Some programmers would expect the operator A::delete to be selected since it matches the operator new that was used to allocate the storage. Others would expect the standard operator delete to be called since A::delete is not visible in function f. By prohibiting declarations of new and delete in a namespace, you can avoid this hassle.

See also  Does It Make Sense to Splurge on a Laptop?
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist