Proposal: Database Engine for D

[John Colvin via Digitalmars-d]

On Monday, 4 January 2016 at 12:28:47 UTC, Russel Winder wrote:
> I must now try creating a D version of the 
> pytest.mark.parametrize decorator – unless someone already has 
> and I have just missed it.

I quick look at pytest.mark.parametrize suggests it could be 
implemented with UDAs and a test-runner that finds all 
declarations a module (recursively) and does all the relevant 
logic (e.g. that's got more than one instance of parametrize, so 
do some sort of cartesian product of the inputs) and actually 
runs the test.

The main thing that python has here over D is that D's UDAs can't 
directly modify the function they're attached to, but I don't 
think that's necessary for parametrize.

Interestingly, functions can query their own attributes:

@(3) auto attr()
{
	return __traits(getAttributes, attr)[0];
}

unittest
{
	assert(attr() == 3);
}

not sure when I'd use that though...