[colm-users] new way of constructing trees
thurston at complang.org
Wed Sep 9 23:54:42 UTC 2009
I'm experimenting with a new way in Colm to make trees. The existing
construct expression is useful for building trees in a bottom up
fashion. It is parsed at compile-time to give some static assurance of
The existing parse expression can be used to parse from a stream source,
or reparse the text of a tree as a new type. The parsing happens at
run-time and may fail.
A new third method, the accumulator, can be used to incrementally build
a tree by parsing little bits at a time. This is useful for building an
output tree over the course of a top-down, left-right traversal.
See here for a simple example:
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