Add return type to MethodSignature

1 files changed, 5 insertions, 5 deletions

diff --git a/src/main/java/org/zwobble/couscous/interpreter/values/StringInterpreterValue.java b/src/main/java/org/zwobble/couscous/interpreter/values/StringInterpreterValue.java
index 55a17cc..ae7d141 100644
--- a/src/main/java/org/zwobble/couscous/interpreter/values/StringInterpreterValue.java
+++ b/src/main/java/org/zwobble/couscous/interpreter/values/StringInterpreterValue.java
@@ -10,24 +10,24 @@ import static org.zwobble.couscous.util.ExtraLists.list;
 
 public final class StringInterpreterValue implements InterpreterValue {
     public static final ConcreteType TYPE = ConcreteType.builder(StringInterpreterValue.class, StringValue.REF)
-        .method("length", list(), (environment, arguments) ->
+        .method("length", list(), IntegerValue.REF, (environment, arguments) ->
             new IntegerInterpreterValue(arguments.getReceiver().value.length()))
 
-        .method("substring", list(IntegerValue.REF, IntegerValue.REF), (environment, arguments) -> {
+        .method("substring", list(IntegerValue.REF, IntegerValue.REF), StringValue.REF, (environment, arguments) -> {
             IntegerInterpreterValue startIndex = (IntegerInterpreterValue)arguments.get(0);
             IntegerInterpreterValue endIndex = (IntegerInterpreterValue)arguments.get(1);
             return of(arguments.getReceiver().value.substring(startIndex.getValue(), endIndex.getValue()));
         })
 
-        .method(Operator.ADD.getSymbol(), list(StringValue.REF), (environment, arguments) -> {
+        .method(Operator.ADD.getSymbol(), list(StringValue.REF), StringValue.REF, (environment, arguments) -> {
             StringInterpreterValue right = (StringInterpreterValue)arguments.get(0);
             return of(arguments.getReceiver().value + right.value);
         })
 
-        .method("toLowerCase", list(), (environment, arguments) ->
+        .method("toLowerCase", list(), StringValue.REF, (environment, arguments) ->
             of(arguments.getReceiver().value.toLowerCase()))
 
-        .method("equals", list(ObjectValues.OBJECT), (environment, arguments) -> {
+        .method("equals", list(ObjectValues.OBJECT), BooleanValue.REF, (environment, arguments) -> {
             InterpreterValue right = arguments.get(0);
             if (right instanceof StringInterpreterValue) {
                 return BooleanInterpreterValue.of(arguments.getReceiver().value.equals(((StringInterpreterValue)right).value));