On Tuesday, 27 June 2017 at 00:10:32 UTC, jag wrote:
On Monday, 26 June 2017 at 21:53:57 UTC, John Colvin wrote:
I wonder what could be done with something like this:
void foo(int a)
{
if (a > 0)
throw new BlahException("blah");
throw new BloopException("bloop");
}
unittest
{
// NEW FEATURE HERE
alias Exceptions = __traits(thrownTypes, foo);
static assert (staticIndexOf!(BlahException, Exceptions)
>= 0);
static assert (staticIndexOf!(BloopException, Exceptions)
>= 0);
}
I'm imagining one could use that to do quite a lot of what
checked exceptions provide.
So the only way for a programmer to know what exceptions can be
thrown by a method is by running the code? In Java this is
known while you are writing the code, even before you compile
the code. And the compiler verifies that you are handling or
passing on all possible exceptions. This is important.
As I have pointed out, implementing such a feature for function
exception sets would be *one* component; the others are mentioned
here [1].
[1]
http://forum.dlang.org/post/[email protected]
