toHash => pure, nothrow, const, @safe

[Jonathan M Davis]

On Monday, March 12, 2012 11:25:41 H. S. Teoh wrote:
> On Mon, Mar 12, 2012 at 02:10:23PM -0400, Jonathan M Davis wrote:
> > On Monday, March 12, 2012 11:04:54 H. S. Teoh wrote:
> > > Tangential note: writing unit tests may be tedious, but D's inline
> > > unittest syntax has alleviated a large part of that tedium. So much so
> > > that I find myself writing as much code in unittests as real code.
> > > Which is a good thing, because in the past I'd always been too lazy to
> > > write any unittests at all.
> > 
> > D doesn't make writing unit tests easy, since there's an intrinsic
> > amount of effort required to write them, just like there is with any
> > code, but it takes away all of the extraneous effort in having to set
> > up a unit test framework and the like. And by removing pretty much
> > anything from the effort which is not actually required, it makes
> > writing unit testing about as easy as it can be.
> 
> I would argue that D *does* make unit tests easier to write, in that you
> can write them in straight D code inline (as opposed to some testing
> frameworks that require external stuff like Expect, Python, intermixed
> with native code), so you don't need to put what you're writing on hold
> while you go off and write unittests. You can just insert a unittest
> block after the function/class/etc immediately while the code is still
> fresh in your mind. I often find myself writing unittests simultaneously
> with real code, since while writing the code I see a possible boundary
> condition to test for, and immediately put that in a unittest to ensure
> I don't forget about it later. This improves the quality of both the
> code and the unittests.

I didn't say that D doesn't make writing unit tests easier. I just said that 
it doesn't make them _easy_. They're as much work as writing any code is. But 
by making them easier, D makes them about as easy to write as they can be.

Regardless, built-in unit testing is a fantastic feature.

- Jonathan m Davis