40 lines
551 B
Go
40 lines
551 B
Go
package node
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type Nullable struct {
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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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return &Nullable{
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nil,
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Expression,
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}
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}
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func (n Nullable) Attributes() map[string]interface{} {
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return nil
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}
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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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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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