Add reading of reference to zero-arg methods

2 files changed, 27 insertions, 6 deletions

diff --git a/src/main/java/org/zwobble/couscous/frontends/java/JavaMethodReferenceReader.java b/src/main/java/org/zwobble/couscous/frontends/java/JavaMethodReferenceReader.java
index db88310..4930ee4 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaMethodReferenceReader.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaMethodReferenceReader.java
@@ -81,11 +81,23 @@ public class JavaMethodReferenceReader {
                 arguments,
                 type);
         } else {
-            return methodCall(
-                javaReader.readExpressionWithoutBoxing(scope, expression.getExpression()),
-                methodName,
-                arguments,
-                type);
+            Expression left = expression.getExpression();
+            if (left instanceof SimpleName && ((SimpleName) left).resolveBinding().getKind() == IBinding.TYPE) {
+                if (arguments.size() != 1) {
+                    throw new UnsupportedOperationException();
+                }
+                return methodCall(
+                    arguments.get(0),
+                    methodName,
+                    list(),
+                    type);
+            } else {
+                return methodCall(
+                    javaReader.readExpressionWithoutBoxing(scope, left),
+                    methodName,
+                    arguments,
+                    type);
+            }
         }
     }
 }
diff --git a/src/test/java/org/zwobble/couscous/tests/frontends/java/InnerTypeReadingTests.java b/src/test/java/org/zwobble/couscous/tests/frontends/java/InnerTypeReadingTests.java
index e7585ec..9901931 100644
--- a/src/test/java/org/zwobble/couscous/tests/frontends/java/InnerTypeReadingTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/frontends/java/InnerTypeReadingTests.java
@@ -39,7 +39,7 @@ public class InnerTypeReadingTests {
     }
 
     @Test
-    public void expressionMethodReferenceWithStaticReceiverIsReadAsLambda() {
+    public void expressionStaticMethodReferenceWithStaticReceiverIsReadAsLambda() {
         assertEquals(
             readTypes(generateMethodSource("void",
                 "java.util.function.Function<String, Integer> function = arg0 -> Integer.parseInt(arg0);")),
@@ -48,6 +48,15 @@ public class InnerTypeReadingTests {
     }
 
     @Test
+    public void expressionInstanceMethodReferenceWithStaticReceiverIsReadAsLambda() {
+        assertEquals(
+            readTypes(generateMethodSource("void",
+                "java.util.function.Function<String, Integer> function = arg0 -> arg0.length();")),
+            readTypes(generateMethodSource("void",
+                "java.util.function.Function<String, Integer> function = String::length;")));
+    }
+
+    @Test
     public void expressionConstructorReferenceWithStaticReceiverIsReadAsLambda() {
         assertEquals(
             readTypes(generateMethodSource("void",