lit string      // token literal

	// Non-syntactic parser control
	exprLev int // < 0: in control clause, >= 0: in expression

	// Ordinary identifier scopes
	pkgScope   *ast.Scope        // pkgScope.Outer == nil
	topScope   *ast.Scope        // top-most scope; may be pkgScope
	unresolved []*ast.Ident      // unresolved identifiers
	imports    []*ast.ImportSpec // list of imports

	// Label scope
	// (maintained by open/close LabelScope)