package bap-std
Exp mapper. By default performs deep identity mapping. Non-leaf methods deconstructs terms, calls corresponding methods on its parts and the constructs it back. So if you're overriding a non-leaf method, then make sure that you called the parent method if you want a normal traversal.
A usual template for method overriding is:
object(self)
inherit mapper as super
method map_X arg=
let x = super#map_X arg in
do_mapping x
end
inherit state
sectionYPositions = computeSectionYPositions($el), 10)"
x-init="setTimeout(() => sectionYPositions = computeSectionYPositions($el), 10)"
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