type ActionNode struct {
	NodeType
	Pos
	tr   *Tree
	Line int       // The line number in the input. Deprecated: Kept for compatibility.
	Pipe *PipeNode // The pipeline in the action.
}

func (t *Tree) newAction(pos Pos, line int, pipe *PipeNode) *ActionNode {
	return &ActionNode{tr: t, NodeType: NodeAction, Pos: pos, Line: line, Pipe: pipe}
}

func (a *ActionNode) String() string {
	var sb strings.Builder
	a.writeTo(&sb)

	case itemTemplate:
		return t.templateControl()
	case itemWith:
		return t.withControl()
	}
	t.backup()
	token := t.peek()
	// Do not pop variables; they persist until "end".
	return t.newAction(token.pos, token.line, t.pipeline("command", itemRightDelim))
}

// Break:
//
//	{{break}}
//
// Break keyword is past.
func (t *Tree) breakControl(pos Pos, line int) Node {