smart completion: insert diamond iff no arg constructor is present or all constructors are generic free and no diamond inference errors occur

java/java-tests/testData/codeInsight/completion/smartType/DiamondNotCollapsed-out.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+class MyClass {
+  public void foo() {
+    MyDD<String> d = new MyDD<String>()
+  }
+}
+
+class MyDD<T> {
+  MyDD(T t){}
+}

java/java-tests/testData/codeInsight/completion/smartType/DiamondNotCollapsed.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+class MyClass {
+  public void foo() {
+    MyDD<String> d = new MyD<caret>
+  }
+}
+
+class MyDD<T> {
+  MyDD(T t){}
+}