What's the equivalent of std::runtime_error in D?

[Ali Çehreli]

On 11/9/22 05:47, MorteFeuille123 wrote:

 > class VKException : Exception
 > {
 >      this(string msg)
 >      {
 >          super(msg);
 >      }
 > }
 >
 > void _()
 > {
 >     if (vkCreateInstance(&createInfo, null, &instance) != VK_SUCCESS) {
 >        throw new VKException("cannot create VK instance")
 >     }
 > }

I enjoy exceptions a little differently:

1) I rarely define my own exception types because most of the time I 
(and the user) care only about a meaningful error message.

(Having said that, during development, I sometimes print not 
'exc.message' but 'exc' itself to view a stack trace even from an 
Exception. (I always print 'exc' for Error objects because a stack trace 
is almost the only thing for such programmer errors.))

2) I never see 'throw' in my code because I think std.exception.enforce 
makes the code more readable (note that != is now ==):

   enforce(vkCreateInstance(&createInfo, null, &instance) == VK_SUCCESS,
           "cannot create VK instance");

'enforce' can throw special exception types as well:

   enforce!VKException(/* ... */);

And for all vk* functions that should return VK_SUCCESS, the whole thing 
can be wrapped in a function template but one needs to learn from 
'enforce's implementation to ensure file and line numbers are reported 
as well:

   vkEnforce(vkCreateInstance(&createInfo, null, &instance),
             "cannot create VK instance");

Ali

P.S. There is also the Learn forum, where such topics may be more 
effective. :)