Revert attributes to their defaults with default keywords

[Steven Schveighoffer via Digitalmars-d]

On 1/9/15 6:57 AM, Daniel Kozak wrote:
> I often have code like this:
>
> class A {
>      final:
>      nothrow:
>      ...
>      some methods
>      ...
> }
>
> Problem comes when I need add methods which for eg.: throws or need to
> be virtual.
>
> I can put them before final: but this is not perfect, because I prefer
> when methods are place in specific order (method abc call method asd so
> asd is bellow abc and so on).
>
> So today I download dmd source and make some small modification (only
> few lines) and this is the result:
>
> http://dpaste.dzfl.pl/472afc938397

Nice, but I don't like the fact that it bluntly returns all attributes 
to default.

For example, if you need to remove the final attribute, but not nothrow, 
I'm assuming it looks something like:

default nothrow void foo()

which doesn't read very well.

If we are going to do this, I'd rather see something like has been 
suggested before -- parameterizing attributes:

final(false) -> remove final

This allows compile-time booleans to modify attributes in ways that are 
extremely difficult in templates today.

-Steve