Fix return type of substring method

rcoh · rcoh · commit 414182ce59d5 · 2022-11-28T14:41:28.000-05:00
diff --git a/smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/stdlib/Substring.java b/smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/stdlib/Substring.java
@@ -44,7 +44,7 @@ public List<Type> getArguments() {
 
     @Override
     public Type getReturnType() {
-        return Type.string();
+        return Type.optional(Type.string());
     }
 
     @Override

Original file line number	Diff line number	Diff line change
`@@ -44,7 +44,7 @@ public List<Type> getArguments() {`
`44`	`44`
`45`	`45`	`@Override`
`46`	`46`	`public Type getReturnType() {`
`47`		`- return Type.string();`
	`47`	`+ return Type.optional(Type.string());`
`48`	`48`	`}`
`49`	`49`
`50`	`50`	`@Override`