2017-12-27 14:26:36 +00:00
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package node
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type Nullable struct {
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attributes map[string]interface{}
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position *Position
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expr Node
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}
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func NewNullable(expression Node) Node {
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2018-01-04 18:42:44 +00:00
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return &Nullable{
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map[string]interface{}{},
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nil,
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expression,
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}
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}
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2017-12-29 15:20:24 +00:00
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func (n Nullable) Attributes() map[string]interface{} {
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return n.attributes
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}
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2017-12-31 09:57:55 +00:00
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func (n Nullable) Attribute(key string) interface{} {
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return n.attributes[key]
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}
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2018-01-02 12:11:08 +00:00
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func (n Nullable) SetAttribute(key string, value interface{}) Node {
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n.attributes[key] = value
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return n
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}
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2017-12-31 10:59:22 +00:00
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func (n Nullable) Position() *Position {
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return n.position
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}
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func (n Nullable) SetPosition(p *Position) Node {
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n.position = p
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return n
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}
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2017-12-27 23:23:32 +00:00
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func (n Nullable) Walk(v Visitor) {
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if v.EnterNode(n) == false {
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return
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}
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if n.expr != nil {
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vv := v.GetChildrenVisitor("expr")
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n.expr.Walk(vv)
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}
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v.LeaveNode(n)
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}
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