fix(pipeline): Fix type annotations on pipeline next parameter

fixes #265

package.json

@@ -54,7 +54,7 @@
   },
   "devDependencies": {
     "aurelia-tools": "0.1.16",
-    "babel-dts-generator": "^0.2.17",
+    "babel-dts-generator": "0.2.18",
     "babel-eslint": "^4.1.1",
     "conventional-changelog": "0.0.11",
     "del": "^1.1.0",

src/pipeline.js

@@ -10,6 +10,32 @@ export const pipelineStatus = {
   running: 'running'
 };
 
+/**
+* A callback to indicate when pipeline processing should advance to the next step
+* or be aborted.
+*/
+interface Next {
+  /**
+  * Indicates the successful completion of the pipeline step.
+  */
+  (): Promise<any>,
+
+  /**
+  * Indicates the successful completion of the entire pipeline.
+  */
+  complete: (result: any) => Promise<any>,
+
+  /**
+  * Indicates that the pipeline should cancel processing.
+  */
+  cancel: (result: any) => Promise<any>,
+
+  /**
+  * Indicates that pipeline processing has failed and should be stopped.
+  */
+  reject: (result: any) => Promise<any>
+}
+
 /**
 * A step to be run during processing of the pipeline.
 */
@@ -21,7 +47,7 @@ interface PipelineStep {
    * @param instruction The navigation instruction.
    * @param next The next step in the pipeline.
    */
-  run(instruction: NavigationInstruction, next: Function): void;
+  run(instruction: NavigationInstruction, next: Next): void;
 }
 
 /**