stmt
	}

	IfStmt struct {
		Init SimpleStmt
		Cond Expr
		Then *BlockStmt
		Else Stmt // either nil, *IfStmt, or *BlockStmt
		stmt
	}

	ForStmt struct {
		Init SimpleStmt // incl. *RangeClause
		Cond Expr
		Post SimpleStmt
		Body *BlockStmt
		stmt
	}

	SwitchStmt struct {
		Init   SimpleStmt
		Tag    Expr // incl. *TypeSwitchGuard
		Body   []*CaseClause