GROOVY-7789

Author: eric-milles

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

@@ -1578,6 +1578,39 @@ public void testTypeChecked7753() {
         runConformTest(sources, "[X]");
     }
 
+    @Test
+    public void testTypeChecked7789() {
+        //@formatter:off
+        String[] sources = {
+            "Main.groovy",
+            "import groovy.transform.stc.*\n" +
+            "@groovy.transform.TypeChecked\n" +
+            "void test() {\n" +
+            "  def list_size = this.<List>wrap({ list -> list.size() })\n" +
+            "  print list_size([])\n" +
+            "}\n" +
+            "def <U> Monad<U> wrap(@ClosureParams(value=FromString, options='U') Closure c) {\n" +
+            "  new Monad<>(c)\n" +
+            "}\n" +
+            "test()\n",
+
+            "Monad.groovy",
+            "import groovy.transform.stc.*\n" +
+            "class Monad<T> {\n" +
+            "  private final Closure c\n" +
+            "  Monad(@ClosureParams(value=FromString, options='T') Closure c) {\n" +
+            "    this.c = c\n" +
+            "  }\n" +
+            "  def call(T t) {\n" +
+            "    c.call(t)\n" +
+            "  }\n" +
+            "}\n",
+        };
+        //@formatter:on
+
+        runConformTest(sources, "0");
+    }
+
     @Test
     public void testTypeChecked7804() {
         //@formatter:off

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

@@ -3702,7 +3702,13 @@ private ClassNode[] resolveGenericsFromTypeHint(final ClassNode receiver, final
             dummyMN.setDeclaringClass(orig.getDeclaringClass());
             dummyMN.setGenericsTypes(orig.getGenericsTypes());
         }
-        ClassNode returnType = inferReturnTypeGenerics(receiver, dummyMN, arguments);
+        GenericsType[] typeArguments = null; // GROOVY-7789
+        Expression emc = typeCheckingContext.getEnclosingMethodCall();
+        if (emc instanceof MethodCallExpression) {
+            MethodCallExpression call = (MethodCallExpression) emc;
+            if (arguments == call.getArguments()) typeArguments = call.getGenericsTypes();
+        }
+        ClassNode returnType = inferReturnTypeGenerics(receiver, dummyMN, arguments, typeArguments);
         GenericsType[] returnTypeGenerics = returnType.getGenericsTypes();
         ClassNode[] inferred = new ClassNode[returnTypeGenerics.length];
         for (int i = 0, n = returnTypeGenerics.length; i < n; i += 1) {

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

@@ -3459,7 +3459,13 @@ private ClassNode[] resolveGenericsFromTypeHint(final ClassNode receiver, final
             dummyMN.setDeclaringClass(orig.getDeclaringClass());
             dummyMN.setGenericsTypes(orig.getGenericsTypes());
         }
-        ClassNode returnType = inferReturnTypeGenerics(receiver, dummyMN, arguments);
+        GenericsType[] typeArguments = null; // GROOVY-7789
+        Expression emc = typeCheckingContext.getEnclosingMethodCall();
+        if (emc instanceof MethodCallExpression) {
+            MethodCallExpression call = (MethodCallExpression) emc;
+            if (arguments == call.getArguments()) typeArguments = call.getGenericsTypes();
+        }
+        ClassNode returnType = inferReturnTypeGenerics(receiver, dummyMN, arguments, typeArguments);
         GenericsType[] returnTypeGenerics = returnType.getGenericsTypes();
         ClassNode[] inferred = new ClassNode[returnTypeGenerics.length];
         for (int i = 0, n = returnTypeGenerics.length; i < n; i += 1) {

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

@@ -3194,7 +3194,14 @@ private void resolveGenericsFromTypeHint(final ClassNode receiver, final Express
             methodNode.setGenericsTypes(selectedMethod.getGenericsTypes());
         }
 
-        returnType = inferReturnTypeGenerics(receiver, methodNode, arguments);
+        GenericsType[] typeArguments = null; // GROOVY-7789
+        Expression emc = typeCheckingContext.getEnclosingMethodCall();
+        if (emc instanceof MethodCallExpression) {
+            MethodCallExpression call = (MethodCallExpression) emc;
+            if (arguments == call.getArguments()) typeArguments = call.getGenericsTypes();
+        }
+
+        returnType = inferReturnTypeGenerics(receiver, methodNode, arguments, typeArguments);
         GenericsType[] returnTypeGenerics = returnType.getGenericsTypes();
         for (int i = 0, n = returnTypeGenerics.length; i < n; i += 1) {
             GenericsType gt = returnTypeGenerics[i];