Use correct base primitive type

rbuckton · rbuckton · commit 0b24f02aae96 · 2017-11-15T17:12:05.000-08:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -18842,7 +18842,7 @@ namespace ts {
                     // If the type parameter is constrained to the base primitive type we're checking for,
                     // consider this a literal context. For example, given a type parameter 'T extends string',
                     // this causes us to infer string literal types for T.
-                    if (constraint.flags & (TypeFlags.String | TypeFlags.Number | TypeFlags.Boolean | TypeFlags.Enum | TypeFlags.UniqueESSymbol)) {
+                    if (constraint.flags & (TypeFlags.String | TypeFlags.Number | TypeFlags.Boolean | TypeFlags.Enum | TypeFlags.Symbol)) {
                         return true;
                     }
                     contextualType = constraint;

Original file line number	Diff line number	Diff line change
`@@ -18842,7 +18842,7 @@ namespace ts {`
`18842`	`18842`	`// If the type parameter is constrained to the base primitive type we're checking for,`
`18843`	`18843`	`// consider this a literal context. For example, given a type parameter 'T extends string',`
`18844`	`18844`	`// this causes us to infer string literal types for T.`
`18845`		`- if (constraint.flags & (TypeFlags.String \| TypeFlags.Number \| TypeFlags.Boolean \| TypeFlags.Enum \| TypeFlags.UniqueESSymbol)) {`
	`18845`	`+ if (constraint.flags & (TypeFlags.String \| TypeFlags.Number \| TypeFlags.Boolean \| TypeFlags.Enum \| TypeFlags.Symbol)) {`
`18846`	`18846`	`return true;`
`18847`	`18847`	`}`
`18848`	`18848`	`contextualType = constraint;`