// is a single unary expression of the form "range x"
		x := as.Rhs[0].(*ast.UnaryExpr).X
		return &ast.RangeStmt{
			For:    pos,
			Key:    key,
			Value:  value,
			TokPos: as.TokPos,
			Tok:    as.Tok,
			Range:  as.Rhs[0].Pos(),
			X:      x,
			Body:   body,
		}
	}

	// regular for statement
	return &ast.ForStmt{
		For:  pos,
		Init: s1,

		const depth = 1
		p.expr0(s.X, depth+1)
		p.setPos(s.TokPos)
		p.print(s.Tok)

	case *ast.AssignStmt:
		var depth = 1
		if len(s.Lhs) > 1 && len(s.Rhs) > 1 {
			depth++
		}
		p.exprList(s.Pos(), s.Lhs, depth, 0, s.TokPos, false)
		p.print(blank)
		p.setPos(s.TokPos)
		p.print(s.Tok, blank)
		p.exprList(s.TokPos, s.Rhs, depth, 0, token.NoPos, false)

	case *ast.GoStmt:

	if as, isAssign := s2.(*ast.AssignStmt); isAssign {
		// possibly a for statement with a range clause; check assignment operator
		if as.Tok != token.ASSIGN && as.Tok != token.DEFINE {
			p.errorExpected(as.TokPos, "'=' or ':='")
			return &ast.BadStmt{pos, body.End()}
		}
		// check lhs
		var key, value ast.Expr
		switch len(as.Lhs) {
		case 2:
			key, value = as.Lhs[0], as.Lhs[1]
		case 1: