Simplify contextFlags binary check

timsuchanek · timsuchanek · commit 863fc2c78aaa · 2019-07-16T13:26:09.000+02:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -16018,7 +16018,7 @@ namespace ts {
                 const constraint = getConstraintOfTypeParameter(inference.typeParameter);
                 if (constraint) {
                     const instantiatedConstraint = instantiateType(constraint, context.nonFixingMapper);
-                    const isCompletionContext = contextFlags && ((contextFlags | ContextFlags.Completion) === contextFlags);
+                    const isCompletionContext = contextFlags && (contextFlags & ContextFlags.Completion);
                     if (!inferredType || !context.compareTypes(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType)) || isCompletionContext) {
                         inference.inferredType = inferredType = instantiatedConstraint;
                     }

Original file line number	Diff line number	Diff line change
`@@ -16018,7 +16018,7 @@ namespace ts {`
`16018`	`16018`	`const constraint = getConstraintOfTypeParameter(inference.typeParameter);`
`16019`	`16019`	`if (constraint) {`
`16020`	`16020`	`const instantiatedConstraint = instantiateType(constraint, context.nonFixingMapper);`
`16021`		`- const isCompletionContext = contextFlags && ((contextFlags \| ContextFlags.Completion) === contextFlags);`
	`16021`	`+ const isCompletionContext = contextFlags && (contextFlags & ContextFlags.Completion);`
`16022`	`16022`	`if (!inferredType \|\| !context.compareTypes(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType)) \|\| isCompletionContext) {`
`16023`	`16023`	`inference.inferredType = inferredType = instantiatedConstraint;`
`16024`	`16024`	`}`