locate returns a pointer to the variable that holds the node identified by k, along with its parent, if any. If the key is not present, it returns a p

packIndexExpr returns an IndexExpr x[expr0] or IndexListExpr x[expr0, ...].

rebalanceUp visits each excessively unbalanced ancestor of x, restoring balance by rotating it. x is a node that has just been mutated, and so the he

AddFile adds a new file with a given filename, base offset, and file size to the file set s and returns the file. Multiple files may have the same nam

Insert attempts to insert a named object obj into the scope s. If the scope already contains an object alt with the same name, Insert leaves the scope

IsKeyword returns true for tokens corresponding to keywords; it returns false otherwise.

Predicates IsLiteral returns true for tokens corresponding to identifiers and basic type literals; it returns false otherwise.

NewObj creates a new object of a given kind and name.

Offset returns the offset for the given file position p. If p is before the file's start position (or if p is NoPos), the result is 0; if p is past t

PositionFor returns the Position value for the given file position p. If p is out of bounds, it is adjusted to match the File.Offset behavior. If adju

RenameGen renames every generic type parameter called name to newName.

Unparen returns the expression with any enclosing parentheses removed.

add inserts file into the tree, if not present. It panics if file overlaps with another.

delete deletes the node at pos.

digits accepts the sequence { digit | '_' }. If base <= 10, digits accepts any decimal digit but records the offset (relative to the source start) of

expect2 is like expect, but it returns an invalid position if the expected token is not found.

extractIdentifiers extracts all capitalized identifiers from a line of code

fixOffset fixes an out-of-bounds offset such that 0 <= offset <= f.size.

isTypeElem reports whether x is a (possibly parenthesized) type element expression. The result is false if x could be a type element OR an ordinary (v

"[" has already been consumed, and lbrack is its position. If len != nil it is the already consumed array length.

If the result is an identifier, it is not resolved.

pop pops all nodes that appear lexically before pos (i.e., whose lexical extent has ended before or at pos). It returns the last node popped.

rangeElemType returns the element type of a RangeType or RangeInclusiveType, or nil if t is neither.

safePos returns a valid file position for a given position: If pos is valid to begin with, safePos returns pos. If pos is out-of-range, safePos return

scanIdentifier reads the string of valid identifier characters at s.offset. It must only be called when s.ch is known to be a valid letter. Be carefu

validateGuardBody checks that a guard body is non-empty, infers it, and ensures it ends with a return/break/continue statement.

AddLine adds the line offset for a new line. The line offset must be larger than the offset for the previous line and smaller than the file size; othe

AddLineColumnInfo adds alternative file, line, and column number information for a given file offset. The offset must be larger than the offset for th

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