Support multiline attributes

[nervecenter]

Jade currently supports multiline attributes, like so:

input(
    type='checkbox'
    name='agreement'
    checked
)

This would be an excellent feature for Diet.

[burner]

that would be great, but I would like to see an additional comma to make the syntax less ambiguous

 input(
    type='checkbox',
    name='agreement',
    checked
)

[burner]

I have been looking at the parser and don't see this happening this easy. But a maybe something like:

input(                \
    type='checkbox',  \
    name='agreement', \
    checked           \
)

allows for a preprocessing step to transfrom the above code into a single line similar to Makefiles

[burner]

@s-ludwig would that be an option?

[s-ludwig]

I'd rather not introduce additional syntax due to shortcomings of the current implementation. I'm (slowly) working on a successor implementation, which makes this much easier, so I'd concentrate the effort on that one. It still has to show if it will be able to compile real-world sized templates due to its presumably increased memory use, or if DMD's CTFE engine needs a rewrite first.

[burner]

hm, nice to know. I will have a look.

on a site note, adding the backslash thing is properly isn't hard. removeEmptyLines is the place to do it, I think