CODEWITHSUNDEEP
c++new-operatordefinitiondelete-operator
nitin_cherian
nitin_cherian

Reputation: 6655

Definition of the global new and the delete operator

Which library has the definition for the global new and the delete operator? Specifically which file in the library contains the definition for these operators?

Upvotes: 0

Views: 125

Answers (2)

Mike Seymour
Mike Seymour

Reputation: 254471

The non-placement forms of operator new and operator delete (and their array forms) are declared implicitly in the global scope in every translation unit.

The standard placement forms are declared in <new>.

The definitions of library functions are not generally available. Your supplier might supply the source, in which case they will be in there somewhere.

Although, from your comments, you may be talking about the use of new in a new-expression, rather than the operator new function that allocates memory. The new-expression is handled by the compiler, generating the necessary calls to operator new and the object(s) constructor(s). There probably won't be a specific implementation of this anywhere; you'd need to look at the relevant part of the compiler's code generator.

Upvotes: 3

CB Bailey
CB Bailey

Reputation: 791909

It's not specified where these are defined but it is specified that they are declared in the header <new>. (You shouldn't have to include <new> if you are just using the standard versions used by non-placement new expressions, these are available automatically in all translation units.)

Upvotes: 3

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