NodeBranch = enum
  NoneNode, Empty, Ident, Sym, Type, CharLit, IntLit, Int8Lit, Int16Lit,
  Int32Lit, Int64Lit, UIntLit, UInt8Lit, UInt16Lit, UInt32Lit, UInt64Lit,
  FloatLit, Float32Lit, Float64Lit, Float128Lit, StrLit, RStrLit, TripleStrLit,
  NilLit, ComesFrom, DotCall, Command, Call, CallStrLit, Infix, Prefix, Postfix,
  HiddenCallConv, ExprEqExpr, ExprColonExpr, IdentDefs, VarTuple, Par,
  ObjConstr, Curly, CurlyExpr, Bracket, BracketExpr, PragmaExpr, Range, DotExpr,
  CheckedFieldExpr, DerefExpr, IfExpr, ElifExpr, ElseExpr, Lambda, Do,
  AccQuoted, TableConstr, Bind, ClosedSymChoice, OpenSymChoice, HiddenStdConv,
  HiddenSubConv, Conv, Cast, StaticExpr, Addr, HiddenAddr, HiddenDeref,
  ObjDownConv, ObjUpConv, ChckRangeF, ChckRange64, ChckRange, StringToCString,
  CStringToString, Asgn, FastAsgn, GenericParams, FormalParams, OfInherit,
  ImportAs, ProcDef, MethodDef, ConverterDef, MacroDef, TemplateDef,
  IteratorDef, OfBranch, ElifBranch, ExceptBranch, Else, AsmStmt, Pragma,
  PragmaBlock, IfStmt, WhenStmt, ForStmt, ParForStmt, WhileStmt, CaseStmt,
  TypeSection, VarSection, LetSection, ConstSection, ConstDef, TypeDef,
  YieldStmt, Defer, TryStmt, Finally, RaiseStmt, ReturnStmt, BreakStmt,
  ContinueStmt, BlockStmt, StaticStmt, DiscardStmt, StmtList, ImportStmt,
  ImportExceptStmt, ExportStmt, ExportExceptStmt, FromStmt, IncludeStmt,
  BindStmt, MixinStmt, UsingStmt, CommentStmt, StmtListExpr, BlockExpr,
  StmtListType, BlockType, With, Without, TypeOfExpr, ObjectTy, TupleTy,
  TupleClassTy, TypeClassTy, StaticTy, RecList, RecCase, RecWhen, RefTy, PtrTy,
  VarTy, ConstTy, OutTy, DistinctTy, ProcTy, IteratorTy, SinkAsgn, EnumTy,
  EnumFieldDef, ArgList, Pattern, HiddenTryStmt, Closure, GotoState, State,
  BreakState, FuncDef, TupleConstr, Error, ModuleRef, ReplayAction, NilRodNode,
  OpenSym