From a4a9b16153428953cb882f2d6037c3bcec68ee17 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sat, 14 Dec 2019 18:46:42 +0100
Subject: type safety

---
 src/util/codec.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/util/codec.ts')

diff --git a/src/util/codec.ts b/src/util/codec.ts
index a6fe74905..9f4dc295f 100644
--- a/src/util/codec.ts
+++ b/src/util/codec.ts
@@ -94,10 +94,10 @@ class ObjectCodecBuilder<T, TC> {
    * @param objectDisplayName name of the object that this codec operates on,
    *   used in error messages.
    */
-  build<R extends (TC & T)>(objectDisplayName: string): Codec<R> {
+  build(objectDisplayName: string): Codec<TC> {
     const propList = this.propList;
     return {
-      decode(x: any, c?: Context): R {
+      decode(x: any, c?: Context): TC {
         if (!c) {
           c = {
             path: [`(${objectDisplayName})`],
@@ -112,7 +112,7 @@ class ObjectCodecBuilder<T, TC> {
           );
           obj[prop.name] = propVal;
         }
-        return obj as R;
+        return obj as TC;
       },
     };
   }
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