From 135b838630367e5df6c523e2e3158ef1f18c68ce Mon Sep 17 00:00:00 2001
From: Karsten Schmidt <k@postspectacular.com>
Date: Tue, 4 Jun 2019 14:29:02 +0100
Subject: [PATCH] feat(fsm): enable TS strict compiler flags (refactor)

---
 packages/fsm/src/fsm.ts   |  2 +-
 packages/fsm/src/range.ts | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/packages/fsm/src/fsm.ts b/packages/fsm/src/fsm.ts
index 614e742d11..9a217acd1b 100644
--- a/packages/fsm/src/fsm.ts
+++ b/packages/fsm/src/fsm.ts
@@ -67,7 +67,7 @@ export function fsm<T, C, R>(
               let curr = states[initial]
                   ? states[initial]()
                   : illegalArgs(`invalid initial state: ${initial}`);
-              return [
+              return <Reducer<any, T>>[
                   init,
                   complete,
                   (acc, x) => {
diff --git a/packages/fsm/src/range.ts b/packages/fsm/src/range.ts
index 5a9db4447b..bee95b68d8 100644
--- a/packages/fsm/src/range.ts
+++ b/packages/fsm/src/range.ts
@@ -1,6 +1,11 @@
 import { alts } from "./alts";
 import { altsLit } from "./alts-lit";
-import { AltCallback, AltFallback, LitCallback, Matcher } from "./api";
+import {
+    AltCallback,
+    AltFallback,
+    LitCallback,
+    Matcher
+} from "./api";
 import { result } from "./result";
 
 /**
@@ -43,7 +48,12 @@ export const alpha = <C, R>(
     success?: AltCallback<string, C, R>,
     fail?: AltFallback<string, C, R>
 ): Matcher<string, C, R> =>
-    alts([range("a", "z"), range("A", "Z")], null, success, fail);
+    alts(
+        [range<string, C, R>("a", "z"), range<string, C, R>("A", "Z")],
+        null,
+        success,
+        fail
+    );
 
 /**
  * Combination of `digit()` and `alpha()`.