Implement ReflectionClass::getModule

Summary: We somehow missed ReflectionClass::getModule in our reflection API. This adds it.

Reviewed By: oulgen

Differential Revision: D40282577

fbshipit-source-id: 3a847de98c35fddc8b576515ef602b8a1f333090

Author: jamesjwu

hphp/runtime/ext/reflection/ext_reflection.cpp

@@ -1264,6 +1264,13 @@ static bool HHVM_METHOD(ReflectionClass, isInternalToModule) {
   return cls->isInternal();
 }
 
+static Variant HHVM_METHOD(ReflectionClass, getModule) {
+  auto const cls = ReflectionClassHandle::GetClassFor(this_);
+  auto const name = cls->moduleName();
+  if (!name) return init_null_variant;
+  return String::attach(const_cast<StringData*>(name));
+}
+
 static bool HHVM_METHOD(ReflectionClass, isAbstract) {
   auto const cls = ReflectionClassHandle::GetClassFor(this_);
   return cls->attrs() & AttrAbstract;
@@ -2354,6 +2361,7 @@ struct ReflectionExtension final : Extension {
     HHVM_ME(ReflectionClass, getInterfaceNames);
     HHVM_ME(ReflectionClass, getRequirementNames);
     HHVM_ME(ReflectionClass, getTraitNames);
+    HHVM_ME(ReflectionClass, getModule);
 
     HHVM_ME(ReflectionClass, hasMethod);
     HHVM_STATIC_ME(ReflectionClass, getMethodOrder);

hphp/runtime/ext/reflection/ext_reflection_hni.php

@@ -1644,6 +1644,14 @@ public function isFinal()[]: bool;
   <<__Native>>
   public function isInternalToModule()[]: bool;
 
+  /*
+   * Returns the module associated with the given function.
+   *
+   * @return     ?string  Returns the module name if the class is part of a module, null otherwise.
+   */
+  <<__Native>>
+  public function getModule()[]: ?string;
+
   /**
    * ( excerpt from http://php.net/manual/en/reflectionclass.istrait.php )
    *

hphp/test/slow/modules/reflection-1.php

@@ -14,4 +14,5 @@ function main() {
   var_dump((new ReflectionFunction('f'))->getModule());
   var_dump((new ReflectionFunction('g'))->getModule());
   var_dump((new ReflectionMethod('C', 'f'))->getModule());
+  var_dump((new ReflectionClass('C'))->getModule());
 }

hphp/test/slow/modules/reflection-1.php.expect

@@ -1,3 +1,4 @@
 string(1) "A"
 NULL
 string(1) "B"
+string(1) "B"