From 4e800c3dc55720c476bc6bdbc4fdcf3f63481060 Mon Sep 17 00:00:00 2001
From: Benny van Reeven <bvanreeven@gmail.com>
Date: Sat, 9 Dec 2017 17:05:11 +0100
Subject: [PATCH] Add tests for createLanguage and fix Rule

---
 types/parsimmon/index.d.ts         |  4 ++--
 types/parsimmon/parsimmon-tests.ts | 15 ++++++++++++++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/types/parsimmon/index.d.ts b/types/parsimmon/index.d.ts
index 26ed383daf..a65be6de03 100644
--- a/types/parsimmon/index.d.ts
+++ b/types/parsimmon/index.d.ts
@@ -6,7 +6,7 @@
 //                 Benny van Reeven <https://github.com/bvanreeven>
 //                 Leonard Thieu <https://github.com/leonard-thieu>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.1
+// TypeScript Version: 2.2
 
 /**
  * **NOTE:** You probably will never need to use this function. Most parsing
@@ -75,7 +75,7 @@ declare namespace Parsimmon {
 	}
 
 	interface Rule {
-		[key: string]: (r?: Language) => Parser<any>;
+		[key: string]: (r: Language) => Parser<any>;
 	}
 
 	interface Language {
diff --git a/types/parsimmon/parsimmon-tests.ts b/types/parsimmon/parsimmon-tests.ts
index 3a3049121a..a923364aad 100644
--- a/types/parsimmon/parsimmon-tests.ts
+++ b/types/parsimmon/parsimmon-tests.ts
@@ -1,5 +1,5 @@
 import P = require('parsimmon');
-import { Parser, Mark, Result, Index, Reply } from "parsimmon";
+import { Parser, Mark, Result, Index, Reply, Language } from "parsimmon";
 
 // --  --  --  --  --  --  --  --  --  --  --  --  --
 
@@ -191,3 +191,16 @@ strArrPar = P.sepBy1(P.string('foo'), P.string('bar'));
 strPar = P.test((a: string) => false);
 
 strPar = P.takeWhile((a: string) => true);
+
+// --  --  --  --  --  --  --  --  --  --  --  --  --
+
+let language: Language;
+
+language = P.createLanguage({
+	SomeRule: r => P.alt(P.string(""), r.AnotherRule),
+	AnotherRule: () => P.string(""),
+});
+
+anyPar = language.SomeRule;
+anyPar = language.AnotherRule;
+anyPar = language.UndefinedRule;