Remove noexcept from coroutine_handle<>::resume and operator() #1182
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With the adoption of [coroutine issue 25](http://open-std.org/JTC1/SC22/WG21/docs/papers/2018/p0664r6.html#25) it is no longer undefined behavior for an exception to escape the body of a coroutine, e.g. by rethrowing from `unhandled_exception`. Compiler support for handling such an exception was introduced to MSVC with version 16.7, and with this support it is now well-defined for `resume` to exit with an exception. This PR removes the strengthened noexcept specifiers from both `resume` and `operator()` which previously trapped the undefined behavior.
CaseyCarter
approved these changes
Aug 11, 2020
StephanTLavavej
approved these changes
Aug 11, 2020
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Thanks for this exceptional improvement! 😎 |
Thanks for this amazing co_ntribution! |
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With the adoption of coroutine issue 25
it is no longer undefined behavior for an exception to escape the body
of a coroutine, e.g. by rethrowing from
unhandled_exception. Compilersupport for handling such an exception was introduced to MSVC with
version 16.7, and with this support it is now well-defined for
resumeto exit with an exception. This PR removes the strengthened noexcept
specifiers from both
resumeandoperator()which previously trappedthe undefined behavior.