3 Commits

Author	SHA1	Message	Date
Adam Sampson	d9df114909	Rework gmapMFor so it takes a list of type keys. ... This means we only need one gmapMFor function, and we do fewer calls to typeKey, but we have to make typeKey available for use where it's called.	2008-04-02 15:09:07 +00:00
Adam Sampson	7d9110a9b0	Remove "Data t =>" qualifications from transformation types. ... This is solely because GHC 6.6 doesn't like them (it complains about the type variable already being in scope -- which it is, but there's nothing I can do about that!). This doesn't lose any safety; if you try to write a transformation for something that's not Data you'll find out when you try to pass it to one of the application functions.	2008-04-01 12:31:20 +00:00
Adam Sampson	7525138c96	Defined types for tree traversals, and moved them to their own file. ... We now have three kinds of canned tree traversals, all of which are smart about which types they're applied to: explicit-descent transformations, implicit-descent transformations, and implicit-descent checks. I've only provided depth-first application of the latter two, but we could do breadth-first in the future if necessary.	2008-04-01 12:01:09 +00:00