Hello,

Is there a way to specify what error to throw using (a variant of) assert:
    assert(n > 0, new ValueError("..."));

(Sure, one can write:
    if (n <= 0)
        throw new ValueError("..."));
but the same remark applies to plain assert: the whole point of assert is to have it as builtin feature with clear application field & well-known semantics, shared by the community of D programmers.)

Denis
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spir napisał:

> Is there a way to specify what error to throw using (a variant of) assert:
>      assert(n > 0, new ValueError("..."));
> 
> (Sure, one can write:
>      if (n <= 0)
>          throw new ValueError("..."));
> but the same remark applies to plain assert: the whole point of assert is to
> have it as builtin feature with clear application field & well-known semantics,
> shared by the community of D programmers.)

With built-in assert, no. But std.exception can do it.

enforce(n > 0, new ValueError("..."));

-- 
Tomek

On 2011-02-12 10:05:34 -0500, Andrej Mitrovic <andrej.mitrovich@gmail.com> said:

> Btw, is the inline problem just a DMD implementation problem, or does
> enforce have to be fixed for that?

DMD implementation problem. The inliner doesn't support ref, out, lazy, and delegate arguments at this time. Enforce uses a lazy second argument so it doesn't get inlined.

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Michel Fortin
michel.fortin@michelf.com
http://michelf.com/