Add End to Peg

peg.js

@@ -84,7 +84,7 @@ var Peg = {
    * If the given pattern does not consume input, the matching will be terminated to prevent an eternal loop.
    *
    * Note that if the minimum run is zero, this pattern will always succeed, but might not consume any input.
-   * @template {unknown[]} T
+   * @template {unknown} T
    * @param {number} min
    * @param {Peg.Pattern<T>} pattern
    * @return {Peg.Pattern<T[]>}
@@ -106,4 +106,16 @@ var Peg = {
       }
     };
   },
+
+  /**
+   * Pattern that matches the end of input
+   * @type {Peg.Pattern<true>}
+   */
+  End(source, index) {
+    if (source.length == index) {
+      return [true, index];
+    } else {
+      return null;
+    }
+  },
 };