Dart2 typesafe invocation of IsolateConfiguration callback (#15267)

7358d590 · Jason Simmons · GitHub · 9d46ed2b · 7358d590
Unverified Commit 7358d590 authored Mar 08, 2018 by Jason Simmons Committed by GitHub Mar 08, 2018
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isolates.dart packages/flutter/lib/src/foundation/isolates.dart +3 -1

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--- a/packages/flutter/lib/src/foundation/isolates.dart
+++ b/packages/flutter/lib/src/foundation/isolates.dart
@@ -84,6 +84,8 @@ class _IsolateConfiguration<Q, R> {
  final SendPort resultPort;
  final String debugLabel;
  final int flowId;
+
+  R apply() => callback(message);
 }

 void _spawn<Q, R>(_IsolateConfiguration<Q, R> configuration) {
@@ -91,7 +93,7 @@ void _spawn<Q, R>(_IsolateConfiguration<Q, R> configuration) {
  Timeline.timeSync(
    '${configuration.debugLabel}',
    () {
-      result = configuration.callback(configuration.message);
+      result = configuration.apply();
    },
    flow: Flow.step(configuration.flowId),
  );