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std::set_unexpected - cppreference.com

From cppreference.com

Defined in header <exception>

std::unexpected_handler set_unexpected( std::unexpected_handler f ) throw();

 (until C++11)

std::unexpected_handler set_unexpected( std::unexpected_handler f ) noexcept;

 (deprecated in C++11)
(removed in C++17)

Makes f the new global std::unexpected_handler and returns the previously installed std::unexpected_handler.

This function is thread-safe. Every call to std::set_unexpected synchronizes-with (see std::memory_order) the subsequent calls to std::set_unexpected and std::get_unexpected

(since C++11)

Parameters

f - pointer to function of type std::unexpected_handler, or null pointer

Return value

The previously-installed unexpected handler, or a null pointer value if none was installed.

See also

(deprecated in C++11)(removed in C++17)

 function called when dynamic exception specification is violated
(function) [edit]

(deprecated in C++11)(removed in C++17)

 obtains the current unexpected_handler
(function) [edit]

(deprecated in C++11)(removed in C++17)

 the type of the function called by std::unexpected
(typedef) [edit]