GROOVY-9974

Author: eric-milles

base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/TypeCheckedTests.java

@@ -1243,4 +1243,23 @@ public void testTypeChecked9972c() {
 
         runConformTest(sources, "");
     }
+
+    @Test
+    public void testTypeChecked9974() {
+        //@formatter:off
+        String[] sources = {
+            "Main.groovy",
+            "boolean isBlank(String s) {\n" +
+            "  s.isAllWhitespace()\n" +
+            "}\n" +
+            "@groovy.transform.TypeChecked\n" +
+            "void test() {\n" +
+            "  print([''].removeIf(this.&isBlank))\n" +
+            "}\n" +
+            "test()\n",
+        };
+        //@formatter:on
+
+        runConformTest(sources, "true");
+    }
 }

base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingSupport.java

@@ -1790,12 +1790,21 @@ private static boolean equalIncludingGenerics(ClassNode orig, ClassNode copy) {
     static void extractGenericsConnections(Map<GenericsTypeName, GenericsType> connections, ClassNode type, ClassNode target) {
         if (target == null || type == target || !isUsingGenericsOrIsArrayUsingGenerics(target)) return;
         if (type == null || type == UNKNOWN_PARAMETER_TYPE) return;
+
+        MethodNode sam;
+
         if (type.isArray() && target.isArray()) {
             extractGenericsConnections(connections, type.getComponentType(), target.getComponentType());
+        // GRECLIPSE add
+        } else if (type.equals(CLOSURE_TYPE) && (sam = findSAM(target)) != null) {
+            // GROOVY-9974: Lambda, Closure, Pointer or Reference for SAM-type receiver
+            ClassNode returnType = StaticTypeCheckingVisitor.wrapTypeIfNecessary(sam.getReturnType());
+            extractGenericsConnections(connections, type.getGenericsTypes(), new GenericsType[] {new GenericsType(returnType)});
+        // GRECLIPSE end
         } else if (target.isGenericsPlaceHolder() || type.equals(target) || !implementsInterfaceOrIsSubclassOf(type, target)) {
             // structural match route
             if (target.isGenericsPlaceHolder()) {
-                connections.put(new GenericsTypeName(target.getGenericsTypes()[0].getName()), new GenericsType(type));
+                connections.put(new GenericsTypeName(target.getUnresolvedName()), new GenericsType(type));
             } else {
                 extractGenericsConnections(connections, type.getGenericsTypes(), target.getGenericsTypes());
             }

base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingSupport.java

@@ -1715,12 +1715,21 @@ static void extractGenericsConnections(final Map<GenericsTypeName, GenericsType>
         if (target == null || target == type || !isUsingGenericsOrIsArrayUsingGenerics(target)) return;
         if (type == null || type == UNKNOWN_PARAMETER_TYPE) return;
 
+        MethodNode sam;
+
         if (target.isGenericsPlaceHolder()) {
-            connections.put(new GenericsTypeName(target.getGenericsTypes()[0].getName()), new GenericsType(type));
+            connections.put(new GenericsTypeName(target.getUnresolvedName()), new GenericsType(type));
 
         } else if (type.isArray() && target.isArray()) {
             extractGenericsConnections(connections, type.getComponentType(), target.getComponentType());
 
+        // GRECLIPSE add
+        } else if (type.equals(CLOSURE_TYPE) && (sam = findSAM(target)) != null) {
+            // GROOVY-9974: Lambda, Closure, Pointer or Reference for SAM-type receiver
+            ClassNode returnType = StaticTypeCheckingVisitor.wrapTypeIfNecessary(sam.getReturnType());
+            extractGenericsConnections(connections, type.getGenericsTypes(), new GenericsType[] {new GenericsType(returnType)});
+        // GRECLIPSE end
+
         } else if (type.equals(target) || !implementsInterfaceOrIsSubclassOf(type, target)) {
             extractGenericsConnections(connections, type.getGenericsTypes(), target.getGenericsTypes());
 

base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/stc/StaticTypeCheckingSupport.java

@@ -1713,12 +1713,21 @@ static void extractGenericsConnections(final Map<GenericsTypeName, GenericsType>
         if (target == null || target == type || !isUsingGenericsOrIsArrayUsingGenerics(target)) return;
         if (type == null || type == UNKNOWN_PARAMETER_TYPE) return;
 
+        MethodNode sam;
+
         if (target.isGenericsPlaceHolder()) {
-            connections.put(new GenericsTypeName(target.getGenericsTypes()[0].getName()), new GenericsType(type));
+            connections.put(new GenericsTypeName(target.getUnresolvedName()), new GenericsType(type));
 
         } else if (type.isArray() && target.isArray()) {
             extractGenericsConnections(connections, type.getComponentType(), target.getComponentType());
 
+        // GRECLIPSE add
+        } else if (type.equals(CLOSURE_TYPE) && (sam = findSAM(target)) != null) {
+            // GROOVY-9974: Lambda, Closure, Pointer or Reference for SAM-type receiver
+            ClassNode returnType = StaticTypeCheckingVisitor.wrapTypeIfNecessary(sam.getReturnType());
+            extractGenericsConnections(connections, type.getGenericsTypes(), new GenericsType[] {new GenericsType(returnType)});
+        // GRECLIPSE end
+
         } else if (type.equals(target) || !implementsInterfaceOrIsSubclassOf(type, target)) {
             extractGenericsConnections(connections, type.getGenericsTypes(), target.getGenericsTypes());