This module defines a bidirectional conversion between `ceylon.ast`
and the RedHat compiler AST, as well as functions that directly parse code
to `ceylon.ast` nodes using the RedHat compiler.
`ceylon.ast` → RedHat AST:
that.transform(RedHatTransformer(SimpleTokenFactory()))
RedHat AST → `ceylon.ast`:
compilationUnitToCeylon(that)
Code → `ceylon.ast`:
parseCompilationUnit(code)
For the latter two, there are also functions for (almost) every other
node type, e. g. ...
