[exception.terminate]

# 17 Language support library [[support]](./#support)

## 17.9 Exception handling [[support.exception]](support.exception#exception.terminate)

### 17.9.5 Abnormal termination [exception.terminate]

#### [17.9.5.1](#terminate.handler) Type terminate_handler [[terminate.handler]](terminate.handler)

[🔗](#lib:terminate_handler)

`using terminate_handler = void (*)();
`

[1](#terminate.handler-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4010)

The type of a [*handler function*](#def:handler_function) to be invoked by terminatewhen terminating exception processing[.](#terminate.handler-1.sentence-1)

[2](#terminate.handler-2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4016)

*Required behavior*: A terminate_handler shall
terminate execution of the program without returning to the caller[.](#terminate.handler-2.sentence-1)

[3](#terminate.handler-3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4021)

*Default behavior*: The implementation's default terminate_handler callsabort()[.](#terminate.handler-3.sentence-1)

#### [17.9.5.2](#set.terminate) set_terminate [[set.terminate]](set.terminate)

[🔗](#lib:set_terminate)

`terminate_handler set_terminate(terminate_handler f) noexcept;
`

[1](#set.terminate-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4036)

*Effects*: Establishes the function designated by f as the current
handler function for terminating exception processing[.](#set.terminate-1.sentence-1)

[2](#set.terminate-2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4041)

*Returns*: The previous terminate_handler[.](#set.terminate-2.sentence-1)

[3](#set.terminate-3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4045)

*Remarks*: It is unspecified whether a null pointer value designates the defaultterminate_handler[.](#set.terminate-3.sentence-1)

#### [17.9.5.3](#get.terminate) get_terminate [[get.terminate]](get.terminate)

[🔗](#lib:get_terminate)

`terminate_handler get_terminate() noexcept;
`

[1](#get.terminate-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4059)

*Returns*: The current terminate_handler[.](#get.terminate-1.sentence-1)

[*Note [1](#get.terminate-note-1)*:

This can be a null pointer value[.](#get.terminate-1.sentence-2)

— *end note*]

#### [17.9.5.4](#terminate) terminate [[terminate]](terminate)

[🔗](#lib:terminate_)

`[[noreturn]] void terminate() noexcept;
`

[1](#terminate-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4075)

*Effects*: Calls a terminate_handler function[.](#terminate-1.sentence-1)

It is unspecified whichterminate_handler function will be called if an exception is active
during a call to set_terminate[.](#terminate-1.sentence-2)

Otherwise calls the current terminate_handler function[.](#terminate-1.sentence-3)

[*Note [1](#terminate-note-1)*:

A
default terminate_handler is always considered a callable handler in
this context[.](#terminate-1.sentence-4)

— *end note*]

[2](#terminate-2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L4087)

*Remarks*: Called by the implementation when exception
handling must be abandoned for any of several reasons ([[except.terminate]](except.terminate "14.6.2 The std​::​terminate function"))[.](#terminate-2.sentence-1)

May also be called directly by the program[.](#terminate-2.sentence-2)