Add instead

src/api/Patcher.ts

@@ -17,6 +17,10 @@ class DummyPatcherApi implements IBasePatcherApi {
     before<T, A = unknown[]>(target: T, name: string, cb: (args: A, instance: T) => A): () => void {
         throw new Error("Method not implemented. This is a dummy class.");
     }
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    instead<T, A extends unknown[] = unknown[], R = unknown>(target: T, name: string, cb: (args: A, orig: ((...args_: A) => R), instance: T) => R): () => void {
+        throw new Error("Method not implemented. This is a dummy class.");
+    }
 }
 
 export const PatcherApi = DummyPatcherApi;

src/common/PatcherApi.ts

@@ -22,6 +22,9 @@ const implementationStore = {
                 get before() {
                     return __requireInternal(targetMod, "PatcherApi", "after")?.bind(undefined, this);
                 },
+                get instead() {
+                    return __requireInternal(targetMod, "PatcherApi", "instead")?.bind(undefined, this);
+                },
             };
         },
     }),
@@ -56,6 +59,17 @@ const implementationStore = {
             });
         },
     }),
+    insteadWrapper: new FunctionImplementation({
+        data: null,
+        depends: [],
+        supplies: "instead",
+        isWrapper: true,
+        func<T, A extends unknown[] = unknown[], R = unknown>(thisObj: IBasePatcherApi, target: T, name: string, cb: (args: A, orig: ((...args_: A) => R), instance: T) => A): () => void {
+            return __requireInternal(targetMod, "PatcherApi", "instead", true)!(thisObj.internalId, target, name, (instance_: T, args_: A, orig: ((...args__: A) => R)) => {
+                return cb(args_, orig, instance_);
+            });
+        },
+    }),
 } as { [key: string]: FunctionImplementation };
 export {
     implementationStore,

src/converters/betterdiscord.ts

@@ -24,6 +24,9 @@ class BDPatcherApi implements IBasePatcherApi {
     get before() {
         return createFunctionWithWrapperNeeded("BdApi.Patcher", "before", "beforeWrapper");
     }
+    get instead() {
+        return createFunctionWithWrapperNeeded("BdApi.Patcher", "instead", "insteadWrapper");
+    }
 }
 
 export function convertFormat(ast: Statement[]) {

src/converters/replugged.ts

@@ -28,6 +28,9 @@ class RPPatcherApi implements IBasePatcherApi {
     get before() {
         return createFunctionFromObjectProperty("replugged.Injector.constructor", "beforeWrapper");
     }
+    get instead() {
+        return createFunctionFromObjectProperty("replugged.Injector.constructor", "insteadWrapper");
+    }
 }
 
 export function convertFormat(ast: Statement[]) {