---------------------------------------------------------------------------- Parsing support canStartExpr returns true if the token can start an expre

collapse indicates whether prev may be removed, leaving only next.

compareKey reports whether x is before y (-1), after y (+1), or overlapping y (0). This is a total order so long as all files in the tree have disjoin

Consume a comment and return it and the line on which it ends.

containsReturnStmt checks if a statement or block contains any return statements

deleteMin updates the subtree rooted at *zpos to delete its minimum (leftmost) element, which may be *zpos itself. It returns the deleted node.

deleteSwap deletes a node that has two children by replacing it by its in-order successor, then triggers a rebalance.

extractName splits the expression x into (name, expr) if syntactically x can be written as name expr. The split only happens if expr is a type element

fieldName assumes that x is the type of an anonymous field and returns the corresponding field name. If x is not an acceptable anonymous field, the re

filterUnusedCode removes functions and types from coreBody that aren't referenced in src

filterUnusedImports removes import statements that aren't used in the code

findStructMethod searches for a method across all interfaces a struct implements

formatFieldList formats a parameter or result list into Go-style signature string