Allow one leading ignored “|” or “&” in a type position

mariusschulz · mariusschulz · commit 443abe53730a · 2016-11-19T22:30:18.000+01:00
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
@@ -2615,6 +2615,7 @@ namespace ts {
         }
 
         function parseUnionOrIntersectionType(kind: SyntaxKind, parseConstituentType: () => TypeNode, operator: SyntaxKind): TypeNode {
+            parseOptional(operator);
             let type = parseConstituentType();
             if (token() === operator) {
                 const types = createNodeArray<TypeNode>([type], type.pos);

Original file line number	Diff line number	Diff line change
`@@ -2615,6 +2615,7 @@ namespace ts {`
`2615`	`2615`	`}`
`2616`	`2616`
`2617`	`2617`	`function parseUnionOrIntersectionType(kind: SyntaxKind, parseConstituentType: () => TypeNode, operator: SyntaxKind): TypeNode {`
	`2618`	`+ parseOptional(operator);`
`2618`	`2619`	`let type = parseConstituentType();`
`2619`	`2620`	`if (token() === operator) {`
`2620`	`2621`	`const types = createNodeArray<TypeNode>([type], type.pos);`