Calypso progress report (+ updated MingW64 build)

[Andrei Alexandrescu via Digitalmars-d-announce]

On 11/15/2015 02:32 PM, Elie Morisse wrote:
> On Thursday, 22 October 2015 at 01:19:19 UTC, Andrei Alexandrescu wrote:
>> Great news! What's the story on exceptions? Does Calypso allow D code
>> to catch exceptions thrown from C++ code? -- Andrei
>
> Small update: the LDC 0.16.1 merge was done and it's now possible to
> catch about any C++ exception with catch (C++) (..) {..} statements.
>
> https://github.com/Syniurge/Calypso/blob/master/tests/calypso/eh/std_exception.d
>
>
> Output:
>
>      Throwing an ooops exception
>      Catching the ooops, e.what() == Ooops!
>
>      Throwing another ooops exception
>      Catching the std::exception, e.what() == Ooops!
>
>      Now throwing a float
>      Catching the float, f == 20.160000!
>
>
> What's left to implement for full C++ EH support:
>   - catching class/struct by value (it's already possible to catch
> thrown class values by reference though)
>   - thrown object lifetime
>   - rethrowing

That's great progress. Do you have documentation for how things work? 
For example, what's the lifetime of the pointer people will get from 
std::exception::what().

IMHO: don't worry about catching exceptions by value; it's almost always 
either incorrect, uninteresting, or both. The prize is catching 
(references to) classes rooted in std::exception. Nice-to-have is 
catching (references to) classes rooted in other C++ classes.

A blog post would be fantastic.


Andrei