v_args wrapper

[shewitt-au]

I'm hoping that the v_args decorator with the wrapper option is what I'm looking for. I can't find any info on this feature much beyond its existence. If this is though lack of looking on my part I apologise in advance. Any information would be much appreciated. Thanks.

[erezsh]

Yes, it's not well documented. wrapper is a callback that accepts (f, data, children, meta), where f is the user callback.

Here is the implementation of inline=True, meta=True, etc., using "wrapper" functions:

def _vargs_inline(f, _data, children, _meta):
    return f(*children)
def _vargs_meta_inline(f, _data, children, meta):
    return f(meta, *children)
def _vargs_meta(f, _data, children, meta):
    return f(meta, children)
def _vargs_tree(f, data, children, meta):
    return f(Tree(data, children, meta))