# assertion¶

The assertion library implements the macros HPX_ASSERT and HPX_ASSERT_MSG. Those two macros can be used to implement assertions which are turned of during a release build.

By default, the location and function where the assert has been called from are displayed when the assertion fires. This behavior can be modified by using hpx::assertion::set_assertion_handler. When HPX initializes, it uses this function to specify a more elaborate assertion handler. If your application needs to customize this, it needs to do so before calling hpx::hpx_init, hpx::hpx_main or using the C-main wrappers.

See the API reference of the module for more details.