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Allow visitors to return undefined

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While implementing `ts.Visitor`, it is possible to return `undefined` in order to drop a node. However, the typings do not reflect this and only allow to return `Node | Node []`.

This PR extends the typings to allow `undefined` as well.
This commit is contained in:
Filipe Silva
2017-07-09 18:50:45 +01:00
committed by GitHub
parent ff5d245dcb
commit ae533551c2
1 changed files with 1 additions and 1 deletions
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src/compiler/types.ts
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@@ -4350,7 +4350,7 @@ namespace ts {
*/
export type Visitor = (node: Node) => VisitResult<Node>;
export type VisitResult<T extends Node> = T | T[];
export type VisitResult<T extends Node> = T | T[] | undefined;
export interface Printer {
/**