[Txr-users] Recent new features in git.

[Kaz Kylheku]

FEATURE:

When you specify an explicit list of variables in a collect using 
:vars,
e.g.

@(collect :vars (a b c))

If the collect is successful, but doesn't match anything, the
variables still get bindings, to empty lists.


FEATURE:

New filters:   :upcase and :downcase.


You can specify a filter in @(bind ...) now. You can specify
a filter to be applied to both sides when matching, like this:

 @# fold x and y to upper case before comparing
 @(bind x y :filter :upcase)

Of course if x has no binding, then it takes the unmodified
value of y.

Filters can be specified independently for the left and
right side:

 @# matches if y is the HTML encoding of x
 @(bind x y :rfilter :from_html)



FEATURE:

Compound filters.

If a filter is specified as a list of symbols, then that denotes
a compound filter formed by applying each filter from left
to right.

E.g. when substituting variables in output, convert them
to HTML, and then downcase:

 @(output :filter (:to_html :downcase))
 ...
 @(end)