[coroutine] - only std exceptions are caught from coroutines - Boost-users

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Tamas.Ruszkai＠leica-geosystems.com

19 Feb 2016 19 Feb '16

4:14 p.m.

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Oliver Kowalke

19 Feb 19 Feb

4:49 p.m.

2016-02-19 17:14 GMT+01:00 :

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Hi,

I use boost coroutines and I have realized that in my environment (Visual Studio 2015 Update 1, x64) I cannot catch the exception type of a custom exception.

The example below demonstrates the case. I have a custom exception derived from a std::runime_error. In the main function I want to catch my custom exception type that was thrown in the coroutine. However somehow I always end up in the catch branch of the std::runtime_error.

Are custom exceptions are not supported by the coroutines library?

boost.coroutine - no (->boost.exception's exception_ptr) but if you use boost.coroutine2 (C++11), the exception will be catched by 'catch (MyException const&)' clause

Emil Dotchevski

9:10 p.m.

On Fri, Feb 19, 2016 at 8:14 AM, wrote:

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Hi,

I use boost coroutines and I have realized that in my environment (Visual Studio 2015 Update 1, x64) I cannot catch the exception type of a custom exception.

The example below demonstrates the case. I have a custom exception derived from a std::runime_error. In the main function I want to catch my custom exception type that was thrown in the coroutine. However somehow I always end up in the catch branch of the std::runtime_error.

Are custom exceptions are not supported by the coroutines library?

boost::exception_ptr requires that the exception is thrown using enable_current_exception, see www.boost.org/doc/libs/release/libs/exception/doc/enable_current_exception.html. I recommend to throw the exception using BOOST_THROW_EXCEPTION, which internally uses enable_current_exception. Emil

Oliver Kowalke

20 Feb 20 Feb

10:44 a.m.

2016-02-19 22:10 GMT+01:00 Emil Dotchevski :

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boost::exception_ptr requires that the exception is thrown using enable_current_exception, see www.boost.org/doc/libs/release/libs/exception/doc/enable_current_exception.html. I recommend to throw the exception using BOOST_THROW_EXCEPTION, which internally uses enable_current_exception.

the code looks like this boost::exception_ptr except_; ... if ( except_) boost::rethrow_exception( except_);

Emil Dotchevski

21 Feb 21 Feb

4:37 a.m.

On Sat, Feb 20, 2016 at 2:44 AM, Oliver Kowalke wrote:

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2016-02-19 22:10 GMT+01:00 Emil Dotchevski :

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boost::exception_ptr requires that the exception is thrown using enable_current_exception, see www.boost.org/doc/libs/release/libs/exception/doc/enable_current_exception.html. I recommend to throw the exception using BOOST_THROW_EXCEPTION, which internally uses enable_current_exception.

the code looks like this

boost::exception_ptr except_; ... if ( except_) boost::rethrow_exception( except_);

I mean the original exception emitted by the coroutine should be thrown using BOOST_THROW_EXCEPTION. Emil

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Emil Dotchevski
Oliver Kowalke
Tamas.Ruszkai＠leica-geosystems.com