On 10/19/2010 6:18 AM, Justin Johansson wrote:
For example:
private string THIS_MODULE_NAME = "abc.def";
mixin template MyCorporationStandardUnitTest()
{
scope(success) {
writeln( THIS_MODULE_NAME ~ " unittest passed");
}
scope(failure) {
writeln( THIS_MODULE_NAME ~ " unittest failed");
}
}
I think the D spec does not say this is allowed, but why not?
Thanks in advance for answers,
Justin
(Note: I'm only using PL/D 2.0, so my answers are specific to that
version on the DMD compiler.)
Mixin templates may only contain declarations - not executable
statements. For this, you want a string mixin. There are some things you
could try.
1. I have some GPL code that does what you're trying to do, in a
different way.
Have a look at
http://github.com/aghast/Leda/blob/master/source/leda/test/unit.d . It
outputs TAP, instead of success/failure messages, but IMO that's a
better solution because there are plenty of TAP harnesses around.
2. You could have a look at "scope classes" in the docs:
http://www.digitalmars.com/d/2.0/class.html#auto (I know, "auto" makes
no sense, but it's in the html source..)
This indicates that a class is intended to be used RAII-style, such that
the destructor is called.
To use this, you'd probably have to catch Assertion failures, or put a
hook in the unit test failure handler (see the core.* doc pages in your
local install, since the net links aren't up on the dmd site).
3. You could use a string mixin.
In order to get the module name added, you could generate the string in
a function. I think there's a std* template that does compile-time
formatting, but naturally googling on the obvious keywords doesn't work.
So you'd so something like:
mixin( function_to_generate_the_scope_statements( MODULE_NAME ) );
at the top of your code.
(Note: mixing( "string" ) is different from mixin-templates, and *can*
have statements and expressions, not just declarations.)
Good luck,
=Austin
