A transform is some algorithm that takes a AST subtree and makes any number of modifications to the given subtree.
They cannot see or modify anything outside the given subtree. Transformers are assumed to behave like a set of pure
functions.
Transformers are always applied bottom-up.
The most simple transformer is an empty object ({}). This is equivalent to a no-op transformer that does not change
the given AST.
A transform is some algorithm that takes a AST subtree and makes any number of modifications to the given subtree. They cannot see or modify anything outside the given subtree. Transformers are assumed to behave like a set of pure functions.
Transformers are always applied bottom-up.
The most simple transformer is an empty object (
{}). This is equivalent to a no-op transformer that does not change the given AST.