Differences

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--- tutorial:mixin_examples [2025/10/12 09:21] – Mark page as having a planned rewrite gauntrecluse
+++ tutorial:mixin_examples [2026/04/08 11:56] (current) – [Modifying a return value] Use ModifyReturnValue instead of the getReturnValue + setReturnValue pattern. gauntrecluse
@@ Line 349: / Line 349: @@
 Mixin:
 <code java>
-@Inject(method = "foo()I;", at = @At("RETURN"), cancellable = true)
+@ModifyReturnValue(method = "foo", at = @At("RETURN"))
-private void injected(CallbackInfoReturnable<Integer> cir) {
+private int exampleModifyReturnValue(int original) {
-  cir.setReturnValue(cir.getReturnValue() * 3);
+    return original * 3;
 }
 </code>
@@ Line 357: / Line 357: @@
 Result:
 <code diff>
-  public int foo() {
+public int foo() {
     doSomething1();
     doSomething2();
 -   return doSomething3() + 7;
-+   int i = doSomething3() + 7;
++   return this.exampleModifyReturnValue(doSomething3() + 7);
-+   CallbackInfoReturnable<Integer> cir = new CallbackInfoReturnable<Integer>("foo", true, i);
+}
-+   injected(cir);
-+   if (cir.isCancelled()) return cir.getReturnValue();
-+   return i;
-  }
 </code>