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A replacement for any of the handler functions must meet the semantic requirements specified by the appropriate Required behavior: clause of the replaced function.

New Handler

The requirements for a replacement new_handler are specified by [new.handler], paragraph 2:

Required behavior: A new_handler shall perform one of the following:
— make more storage available for allocation and then return;
— throw an exception of type bad_alloc or a class derived from bad_alloc;
— terminate execution of the program without returning to the caller;

Terminate Handler

The requirements for a replacement terminate_handler are specified by [terminate.handler], paragraph 2:

Required behavior: A terminate_handler shall terminate execution of the program without returning to the caller.

Unexpected Handler

The requirements for a replacement unexpected_handler are specified by [unexpected.handler], paragraph 2. unexpected_handler is a deprecated feature of C++.

Required behavior: An unexpected_handler shall not return. See also 15.5.2.

Noncompliant Code Example

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