Example #1
0
ExpressionPtr FunctionCall::inliner(AnalysisResultConstPtr ar,
                                    ExpressionPtr obj, std::string localThis) {
  FunctionScopePtr fs = getFunctionScope();
  if (m_noInline || !fs || fs == m_funcScope || !m_funcScope->getStmt()) {
    return ExpressionPtr();
  }

  BlockScope::s_jobStateMutex.lock();
  if (m_funcScope->getMark() == BlockScope::MarkProcessing) {
    fs->setForceRerun(true);
    BlockScope::s_jobStateMutex.unlock();
    return ExpressionPtr();
  }
  ReadLock lock(m_funcScope->getInlineMutex());
  BlockScope::s_jobStateMutex.unlock();

  if (!m_funcScope->getInlineAsExpr()) {
    return ExpressionPtr();
  }

  if (m_funcScope->getInlineSameContext() &&
      m_funcScope->getContainingClass() &&
      m_funcScope->getContainingClass() != getClassScope()) {
    /*
      The function contains a context sensitive construct such as
      call_user_func (context sensitive because it could call
      array('parent', 'foo')) so its not safe to inline it
      into a different context.
    */
    return ExpressionPtr();
  }

  MethodStatementPtr m
    (dynamic_pointer_cast<MethodStatement>(m_funcScope->getStmt()));

  VariableTablePtr vt = fs->getVariables();
  int nAct = m_params ? m_params->getCount() : 0;
  int nMax = m_funcScope->getMaxParamCount();
  if (nAct < m_funcScope->getMinParamCount() || !m->getStmts()) {
    return ExpressionPtr();
  }

  InlineCloneInfo info(m_funcScope);
  info.elist = ExpressionListPtr(new ExpressionList(
                                   getScope(), getLocation(),
                                   ExpressionList::ListKindWrapped));
  std::ostringstream oss;
  oss << fs->nextInlineIndex() << "_" << m_name << "_";
  std::string prefix = oss.str();

  if (obj) {
    info.callWithThis = true;
    if (!obj->isThis()) {
      SimpleVariablePtr var
        (new SimpleVariable(getScope(),
                            obj->getLocation(),
                            prefix + "this"));
      var->updateSymbol(SimpleVariablePtr());
      var->getSymbol()->setHidden();
      var->getSymbol()->setUsed();
      var->getSymbol()->setReferenced();
      AssignmentExpressionPtr ae
        (new AssignmentExpression(getScope(),
                                  obj->getLocation(),
                                  var, obj, false));
      info.elist->addElement(ae);
      info.sepm[var->getName()] = var;
      info.localThis = var->getName();
    }
  } else {
    if (m_classScope) {
      if (!m_funcScope->isStatic()) {
        ClassScopeRawPtr oCls = getOriginalClass();
        FunctionScopeRawPtr oFunc = getOriginalFunction();
        if (oCls && !oFunc->isStatic() &&
            (oCls == m_classScope ||
             oCls->derivesFrom(ar, m_className, true, false))) {
          info.callWithThis = true;
          info.localThis = localThis;
        }
      }
      if (!isSelf() && !isParent() && !isStatic()) {
        info.staticClass = m_className;
      }
    }
  }

  ExpressionListPtr plist = m->getParams();

  int i;

  for (i = 0; i < nMax || i < nAct; i++) {
    ParameterExpressionPtr param
      (i < nMax ?
       dynamic_pointer_cast<ParameterExpression>((*plist)[i]) :
       ParameterExpressionPtr());
    ExpressionPtr arg = i < nAct ? (*m_params)[i] :
      Clone(param->defaultValue(), getScope());
    SimpleVariablePtr var
      (new SimpleVariable(getScope(),
                          (i < nAct ? arg.get() : this)->getLocation(),
                          prefix + (param ?
                                    param->getName() :
                                    lexical_cast<string>(i))));
    var->updateSymbol(SimpleVariablePtr());
    var->getSymbol()->setHidden();
    var->getSymbol()->setUsed();
    var->getSymbol()->setReferenced();
    bool ref =
      (i < nMax && m_funcScope->isRefParam(i)) ||
      arg->hasContext(RefParameter);
    arg->clearContext(RefParameter);
    AssignmentExpressionPtr ae
      (new AssignmentExpression(getScope(),
                                arg->getLocation(),
                                var, arg, ref));
    info.elist->addElement(ae);
    if (i < nAct && (ref || !arg->isScalar())) {
      info.sepm[var->getName()] = var;
    }
  }

  if (cloneStmtsForInline(info, m->getStmts(), prefix, ar,
                          getFunctionScope()) <= 0) {
    info.elist->addElement(makeConstant(ar, "null"));
  }

  if (info.sepm.size()) {
    ExpressionListPtr unset_list
      (new ExpressionList(getScope(), getLocation()));

    for (StringToExpressionPtrMap::iterator it = info.sepm.begin(),
           end = info.sepm.end(); it != end; ++it) {
      ExpressionPtr var = it->second->clone();
      var->clearContext((Context)(unsigned)-1);
      unset_list->addElement(var);
    }

    ExpressionPtr unset(
      new UnaryOpExpression(getScope(), getLocation(),
                            unset_list, T_UNSET, true));
    i = info.elist->getCount();
    ExpressionPtr ret = (*info.elist)[--i];
    if (ret->isScalar()) {
      info.elist->insertElement(unset, i);
    } else {
      ExpressionListPtr result_list
        (new ExpressionList(getScope(), getLocation(),
                            ExpressionList::ListKindLeft));
      if (ret->hasContext(LValue)) {
        result_list->setContext(LValue);
        result_list->setContext(ReturnContext);
      }
      result_list->addElement(ret);
      result_list->addElement(unset);
      (*info.elist)[i] = result_list;
    }
  }

  recomputeEffects();

  return replaceValue(info.elist);
}
void ClassStatement::outputCPPImpl(CodeGenerator &cg, AnalysisResultPtr ar) {
  ClassScopeRawPtr classScope = getClassScope();
  if (cg.getContext() == CodeGenerator::NoContext) {
    if (classScope->isRedeclaring()) {
      cg_printf("g->%s%s = ClassStaticsPtr(NEW(%s%s)());\n",
                Option::ClassStaticsObjectPrefix,
                cg.formatLabel(m_name).c_str(),
                Option::ClassStaticsPrefix, classScope->getId(cg).c_str());
      cg_printf("g->%s%s = &%s%s;\n",
                Option::ClassStaticsCallbackPrefix,
                cg.formatLabel(m_name).c_str(),
                Option::ClassWrapperFunctionPrefix,
                classScope->getId(cg).c_str());
    }
    if (classScope->isVolatile()) {
      cg_printf("g->CDEC(%s) = true;\n", m_name.c_str());
    }
    const vector<string> &bases = classScope->getBases();
    for (vector<string>::const_iterator it = bases.begin();
         it != bases.end(); ++it) {
      ClassScopePtr base = ar->findClass(*it);
      if (base && base->isVolatile()) {
        cg_printf("checkClassExists(");
        cg_printString(base->getOriginalName(), ar, shared_from_this());
        string lname = Util::toLower(base->getOriginalName());
        cg_printf(", &%s->CDEC(%s), %s->FVF(__autoload));\n",
                  cg.getGlobals(ar), cg.formatLabel(lname).c_str(),
                  cg.getGlobals(ar));
      }
    }
    return;
  }

  if (cg.getContext() != CodeGenerator::CppForwardDeclaration) {
    printSource(cg);
  }

  string clsNameStr = classScope->getId(cg);
  const char *clsName = clsNameStr.c_str();
  bool redeclared = classScope->isRedeclaring();
  switch (cg.getContext()) {
  case CodeGenerator::CppForwardDeclaration:
    {
      if (Option::GenerateCPPMacros) {
        cg_printf("FORWARD_DECLARE_CLASS(%s);\n", clsName);
        if (redeclared) {
          cg_printf("FORWARD_DECLARE_REDECLARED_CLASS(%s);\n", clsName);
        }
      }
      if (m_stmt) {
        cg.setContext(CodeGenerator::CppClassConstantsDecl);
        m_stmt->outputCPP(cg, ar);
        cg.setContext(CodeGenerator::CppForwardDeclaration);
      }
    }
    break;
  case CodeGenerator::CppDeclaration:
    {
      bool system = cg.getOutput() == CodeGenerator::SystemCPP;
      ClassScopePtr parCls;
      if (!m_parent.empty()) {
        parCls = ar->findClass(m_parent);
        if (parCls && parCls->isRedeclaring()) parCls.reset();
      }
      if (Option::GenerateCppLibCode) {
        cg.printDocComment(classScope->getDocComment());
      }
      cg_printf("class %s%s", Option::ClassPrefix, clsName);
      if (!m_parent.empty() && classScope->derivesDirectlyFrom(ar, m_parent)) {
        if (!parCls) {
          cg_printf(" : public DynamicObjectData");
        } else {
          cg_printf(" : public %s%s", Option::ClassPrefix,
                    parCls->getId(cg).c_str());
        }
      } else {
        if (classScope->derivesFromRedeclaring()) {
          cg_printf(" : public DynamicObjectData");
        } else if (system) {
          cg_printf(" : public ExtObjectData");
        } else {
          cg_printf(" : public ObjectData");
        }
      }
      if (m_base && Option::UseVirtualDispatch) {
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && !intfClassScope->isRedeclaring() &&
              classScope->derivesDirectlyFrom(ar, intf) &&
              (!parCls || !parCls->derivesFrom(ar, intf, true, false))) {
            string id = intfClassScope->getId(cg);
            cg_printf(", public %s%s", Option::ClassPrefix, id.c_str());
          }
        }
      }
      cg_indentBegin(" {\n");
      cg_printf("public:\n");

      cg.printSection("Properties");
      classScope->getVariables()->outputCPPPropertyDecl(cg, ar,
          classScope->derivesFromRedeclaring());

      if (Option::GenerateCppLibCode) {
        cg.printSection("Methods");
        classScope->outputMethodWrappers(cg, ar);
        cg.printSection(">>>>>>>>>> Internal Implementation <<<<<<<<<<");
        cg_printf("// NOTE: Anything below is subject to change. "
                  "Use everything above instead.\n");
      }

      cg.printSection("Class Map");
      if (Option::GenerateCPPMacros) {
        cg_printf("virtual bool o_instanceof(CStrRef s) const;\n");
      }

      if (Option::GenerateCPPMacros) {
        bool dyn = (!parCls && !m_parent.empty()) ||
          classScope->derivesFromRedeclaring() ==
          ClassScope::DirectFromRedeclared;
        bool idyn = parCls && classScope->derivesFromRedeclaring() ==
          ClassScope::IndirectFromRedeclared;
        bool redec = classScope->isRedeclaring();
        if (!classScope->derivesFromRedeclaring()) {
          outputCPPClassDecl(cg, ar, clsName, m_originalName.c_str(),
                             parCls ? parCls->getId(cg).c_str()
                                    : "ObjectData");
        } else {
          cg_printf("DECLARE_DYNAMIC_CLASS(%s, %s, %s)\n", clsName,
                    m_originalName.c_str(),
                    dyn || !parCls ? "DynamicObjectData" :
                    parCls->getId(cg).c_str());
        }
        if (system || Option::EnableEval >= Option::LimitedEval) {
          cg_printf("DECLARE_INVOKES_FROM_EVAL\n");
        }

        bool hasGet = classScope->getAttribute(
          ClassScope::HasUnknownPropGetter);
        bool hasSet = classScope->getAttribute(
          ClassScope::HasUnknownPropSetter);
        bool hasCall = classScope->getAttribute(
          ClassScope::HasUnknownMethodHandler);
        bool hasCallStatic = classScope->getAttribute(
          ClassScope::HasUnknownStaticMethodHandler);

        if (dyn || idyn || redec || hasGet || hasSet ||
            hasCall || hasCallStatic) {
          if (redec && classScope->derivedByDynamic()) {
            cg_printf("DECLARE_ROOT;\n");
             if (!dyn && !idyn) {
               cg_printf("private: ObjectData* root;\n");
               cg_printf("public:\n");
               cg_printf("virtual ObjectData *getRoot() { return root; }\n");
             }
          }

          string conInit = "";
          bool hasParam = false;
          if (dyn) {
            conInit = " : DynamicObjectData(\"" + m_parent + "\", r)";
            hasParam = true;
          } else if (idyn) {
            conInit = " : " + string(Option::ClassPrefix) + parCls->getId(cg) +
              "(r ? r : this)";
            hasParam = true;
          } else {
            if (redec && classScope->derivedByDynamic()) {
              conInit = " : root(r ? r : this)";
            }
            hasParam = true;
          }

          cg_indentBegin("%s%s(%s)%s {%s",
                         Option::ClassPrefix, clsName,
                         hasParam ? "ObjectData* r = NULL" : "",
                         conInit.c_str(),
                         hasGet || hasSet ? "\n" : "");
          if (hasGet) cg_printf("setAttribute(UseGet);\n");
          if (hasSet) cg_printf("setAttribute(UseSet);\n");
          if (hasCall) cg_printf("setAttribute(HasCall);\n");
          if (hasCallStatic) cg_printf("setAttribute(HasCallStatic);\n");
          cg_indentEnd("}\n");
        }
      }

      cg_printf("void init();\n");

      if (classScope->needLazyStaticInitializer()) {
        cg_printf("static GlobalVariables *lazy_initializer"
                  "(GlobalVariables *g);\n");
      }

      if (!classScope->getAttribute(ClassScope::HasConstructor)) {
        FunctionScopePtr func = classScope->findFunction(ar, "__construct",
                                                         false);
        if (func && !func->isAbstract() && !classScope->isInterface()) {
          func->outputCPPCreateDecl(cg, ar);
        }
      }
      if (classScope->getAttribute(ClassScope::HasDestructor)) {
        cg_printf("public: virtual void destruct();\n");
      }

      // doCall
      if (classScope->getAttribute(ClassScope::HasUnknownMethodHandler)) {
        cg_printf("Variant doCall(Variant v_name, Variant v_arguments, "
                  "bool fatal);\n");
      }

      if (classScope->isRedeclaring() &&
          !classScope->derivesFromRedeclaring() &&
          classScope->derivedByDynamic()) {
        cg_printf("Variant doRootCall(Variant v_name, Variant v_arguments, "
                  "bool fatal);\n");
      }

      if (m_stmt) m_stmt->outputCPP(cg, ar);
      {
        set<string> done;
        classScope->outputCPPStaticMethodWrappers(cg, ar, done, clsName);
      }

      if (cg.getOutput() == CodeGenerator::SystemCPP &&
          ar->isBaseSysRsrcClass(clsName) &&
          !classScope->hasProperty("rsrc")) {
        cg_printf("public: Variant %srsrc;\n", Option::PropertyPrefix);
      }
      if (Option::GenerateCPPMacros) {
        classScope->outputCPPJumpTableDecl(cg, ar);
      }
      cg_indentEnd("};\n");

      if (redeclared) {
        cg_indentBegin("class %s%s : public ClassStatics {\n",
                       Option::ClassStaticsPrefix, clsName);
        cg_printf("public:\n");
        cg_printf("DECLARE_OBJECT_ALLOCATION(%s%s);\n",
                  Option::ClassStaticsPrefix, clsName);
        cg_printf("%s%s() : ClassStatics(%d) {}\n",
                  Option::ClassStaticsPrefix, clsName,
                  classScope->getRedeclaringId());
        cg_indentBegin("Variant %sgetInit(CStrRef s) {\n",
                       Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%sgetInit(s);\n", Option::ClassPrefix,
                  clsName, Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentBegin("Variant %sget(CStrRef s) {\n",
                       Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%sget(s);\n", Option::ClassPrefix,
                  clsName, Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentBegin("Variant &%slval(CStrRef s) {\n",
                  Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%slval(s);\n", Option::ClassPrefix,
                  clsName, Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentBegin("Object createOnly(ObjectData* root = NULL) {\n");
        cg_printf("Object r((NEW(%s%s)(root)));\n", Option::ClassPrefix,
            clsName);
        cg_printf("r->init();\n");
        cg_printf("return r;\n");
        cg_indentEnd("}\n");
        cg_indentBegin("Variant %sconstant(const char* s) {\n",
                       Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%sconstant(s);\n", Option::ClassPrefix,
                  clsName, Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentBegin("Variant %sinvoke_from_eval(const char *c, "
                       "const char *s, Eval::VariableEnvironment &env, "
                       "const Eval::FunctionCallExpression *call, "
                       "int64 hash = -1, bool fatal = true) "
                       "{\n",
                       Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%sinvoke_from_eval(c, s, env, call, hash, "
                  "fatal);\n",
                  Option::ClassPrefix, clsName,
                  Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentBegin("bool %sget_call_info(MethodCallPackage &mcp, "
          "int64 hash = -1) {\n",
            Option::ObjectStaticPrefix);
        cg_printf("return %s%s::%sget_call_info(mcp, hash);\n",
            Option::ClassPrefix, clsName, Option::ObjectStaticPrefix);
        cg_indentEnd("}\n");
        cg_indentEnd("};\n");
      }

      classScope->outputCPPGlobalTableWrappersDecl(cg, ar);
    }
    break;
  case CodeGenerator::CppImplementation:
    if (m_stmt) {
      cg.setContext(CodeGenerator::CppClassConstantsImpl);
      m_stmt->outputCPP(cg, ar);
      cg.setContext(CodeGenerator::CppImplementation);
    }

    classScope->outputCPPSupportMethodsImpl(cg, ar);

    if (redeclared) {
      cg_printf("IMPLEMENT_OBJECT_ALLOCATION(%s%s);\n",
                Option::ClassStaticsPrefix, clsName);
    }

    cg_indentBegin("void %s%s::init() {\n",
                   Option::ClassPrefix, clsName);
    if (!m_parent.empty()) {
      if (classScope->derivesFromRedeclaring() ==
          ClassScope::DirectFromRedeclared) {
        cg_printf("parent->init();\n");
      } else {

        ClassScopePtr parCls = ar->findClass(m_parent);
        cg_printf("%s%s::init();\n", Option::ClassPrefix,
                  parCls->getId(cg).c_str());
      }
    }
    if (classScope->getVariables()->
        getAttribute(VariableTable::NeedGlobalPointer)) {
      cg.printDeclareGlobals();
    }
    cg.setContext(CodeGenerator::CppConstructor);
    if (m_stmt) m_stmt->outputCPP(cg, ar);

    // This is lame. Exception base class needs to prepare stacktrace outside
    // of its PHP constructor. Every subclass of exception also needs this
    // stacktrace, so we're adding an artificial __init__ in exception.php
    // and calling it here.
    if (m_name == "exception") {
      cg_printf("{CountableHelper h(this); t___init__();}\n");
    }

    cg_indentEnd("}\n");

    if (classScope->needStaticInitializer()) {
      cg_indentBegin("void %s%s::os_static_initializer() {\n",
                     Option::ClassPrefix, clsName);
      cg.printDeclareGlobals();
      cg.setContext(CodeGenerator::CppStaticInitializer);
      if (m_stmt) m_stmt->outputCPP(cg, ar);
      cg_indentEnd("}\n");
      cg_indentBegin("void %s%s() {\n",
                     Option::ClassStaticInitializerPrefix, clsName);
      cg_printf("%s%s::os_static_initializer();\n",  Option::ClassPrefix,
                clsName);
      cg_indentEnd("}\n");
    }
    if (classScope->needLazyStaticInitializer()) {
      cg_indentBegin("GlobalVariables *%s%s::lazy_initializer("
                     "GlobalVariables *g) {\n", Option::ClassPrefix, clsName);
      cg_indentBegin("if (!g->%s%s) {\n",
                     Option::ClassStaticInitializerFlagPrefix, clsName);
      cg_printf("g->%s%s = true;\n", Option::ClassStaticInitializerFlagPrefix,
                clsName);
      cg.setContext(CodeGenerator::CppLazyStaticInitializer);
      if (m_stmt) m_stmt->outputCPP(cg, ar);
      cg_indentEnd("}\n");
      cg_printf("return g;\n");
      cg_indentEnd("}\n");
    }
    cg.setContext(CodeGenerator::CppImplementation);
    if (m_stmt) m_stmt->outputCPP(cg, ar);

    break;
  case CodeGenerator::CppFFIDecl:
  case CodeGenerator::CppFFIImpl:
    if (m_stmt) m_stmt->outputCPP(cg, ar);
    break;
  case CodeGenerator::JavaFFI:
    {
      if (classScope->isRedeclaring()) break;

      // TODO support PHP namespaces, once HPHP supports it
      string packageName = Option::JavaFFIRootPackage;
      string packageDir = packageName;
      Util::replaceAll(packageDir, ".", "/");

      string outputDir = ar->getOutputPath() + "/" + Option::FFIFilePrefix +
        packageDir + "/";
      Util::mkdir(outputDir);

      // uses a different cg to generate a separate file for each PHP class
      // also, uses the original capitalized class name
      string clsFile = outputDir + getOriginalName() + ".java";
      ofstream fcls(clsFile.c_str());
      CodeGenerator cgCls(&fcls, CodeGenerator::FileCPP);
      cgCls.setContext(CodeGenerator::JavaFFI);

      cgCls.printf("package %s;\n\n", packageName.c_str());
      cgCls.printf("import hphp.*;\n\n");

      printSource(cgCls);

      string clsModifier;
      switch (m_type) {
      case T_CLASS:
        break;
      case T_ABSTRACT:
        clsModifier = "abstract ";
        break;
      case T_FINAL:
        clsModifier = "final ";
        break;
      }
      cgCls.printf("public %sclass %s ", clsModifier.c_str(),
                   getOriginalName().c_str());

      ClassScopePtr parCls;
      if (!m_parent.empty()) parCls = ar->findClass(m_parent);
      if (!m_parent.empty() && classScope->derivesDirectlyFrom(ar, m_parent)
          && parCls && parCls->isUserClass() && !parCls->isRedeclaring()) {
        // system classes are not supported in static FFI translation
        // they shouldn't appear as superclasses as well
        cgCls.printf("extends %s", parCls->getOriginalName().c_str());
      }
      else {
        cgCls.printf("extends HphpObject");
      }
      if (m_base) {
        bool first = true;
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && classScope->derivesFrom(ar, intf, false, false)
           && intfClassScope->isUserClass()) {
            if (first) {
              cgCls.printf(" implements ");
              first = false;
            }
            else {
              cgCls.printf(", ");
            }
            cgCls.printf(intfClassScope->getOriginalName().c_str());
          }
        }
      }

      cgCls.indentBegin(" {\n");

      // constructor for initializing the variant pointer
      cgCls.printf("protected %s(long ptr) { super(ptr); }\n\n",
                   getOriginalName().c_str());

      FunctionScopePtr cons = classScope->findConstructor(ar, true);
      if (cons && !cons->isAbstract() || m_type != T_ABSTRACT) {
        // if not an abstract class and not having an explicit constructor,
        // adds a default constructor
        outputJavaFFIConstructor(cgCls, ar, cons);
      }

      if (m_stmt) m_stmt->outputCPP(cgCls, ar);
      cgCls.indentEnd("}\n");

      fcls.close();
    }
    break;
  case CodeGenerator::JavaFFICppDecl:
  case CodeGenerator::JavaFFICppImpl:
    {
      if (classScope->isRedeclaring()) break;

      if (m_stmt) m_stmt->outputCPP(cg, ar);
      FunctionScopePtr cons = classScope->findConstructor(ar, true);
      if (cons && !cons->isAbstract() || m_type != T_ABSTRACT) {
        outputJavaFFICPPCreator(cg, ar, cons);
      }
    }
    break;
  default:
    ASSERT(false);
    break;
  }
}
void ClassStatement::outputCPPImpl(CodeGenerator &cg, AnalysisResultPtr ar) {
  if (cg.getContext() == CodeGenerator::NoContext) {
    InterfaceStatement::outputCPPImpl(cg, ar);
    return;
  }

  ClassScopeRawPtr classScope = getClassScope();
  if (cg.getContext() != CodeGenerator::CppForwardDeclaration) {
    printSource(cg);
  }

  string clsNameStr = classScope->getId();
  const char *clsName = clsNameStr.c_str();

  switch (cg.getContext()) {
  case CodeGenerator::CppDeclaration:
    {
      if (Option::GenerateCPPMacros) {
        classScope->outputForwardDeclaration(cg);
      }
      classScope->outputCPPGlobalTableWrappersDecl(cg, ar);

      bool system = cg.getOutput() == CodeGenerator::SystemCPP;
      ClassScopePtr parCls;
      if (!m_parent.empty()) {
        parCls = ar->findClass(m_parent);
        if (parCls && parCls->isRedeclaring()) parCls.reset();
      }
      if (Option::GenerateCppLibCode) {
        cg.printDocComment(classScope->getDocComment());
      }
      cg_printf("class %s%s", Option::ClassPrefix, clsName);
      if (!m_parent.empty() && classScope->derivesDirectlyFrom(m_parent)) {
        if (!parCls) {
          cg_printf(" : public DynamicObjectData");
        } else {
          cg_printf(" : public %s%s", Option::ClassPrefix,
                    parCls->getId().c_str());
        }
      } else {
        if (classScope->derivesFromRedeclaring()) {
          cg_printf(" : public DynamicObjectData");
        } else if (system) {
          cg_printf(" : public ExtObjectData");
        } else {
          cg_printf(" : public ObjectData");
        }
      }
      if (m_base && Option::UseVirtualDispatch) {
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && !intfClassScope->isRedeclaring() &&
              classScope->derivesDirectlyFrom(intf) &&
              (!parCls || !parCls->derivesFrom(ar, intf, true, false))) {
            string id = intfClassScope->getId();
            cg_printf(", public %s%s", Option::ClassPrefix, id.c_str());
          }
        }
      }
      cg_indentBegin(" {\n");
      cg_printf("public:\n");

      cg.printSection("Properties");
      if (classScope->getVariables()->outputCPPPropertyDecl(
            cg, ar, classScope->derivesFromRedeclaring())) {
        cg.printSection("Destructor");
        cg_printf("~%s%s() NEVER_INLINE {}", Option::ClassPrefix, clsName);
      }

      if (Option::GenerateCppLibCode) {
        cg.printSection("Methods");
        classScope->outputMethodWrappers(cg, ar);
        cg.printSection(">>>>>>>>>> Internal Implementation <<<<<<<<<<");
        cg_printf("// NOTE: Anything below is subject to change. "
                  "Use everything above instead.\n");
      }

      cg.printSection("Class Map");

      bool hasEmitCppCtor = false;
      bool needsCppCtor = classScope->needsCppCtor();
      bool needsInit    = classScope->needsInitMethod();

      bool disableDestructor =
        !classScope->canSkipCreateMethod(ar) ||
        (!classScope->derivesFromRedeclaring() &&
         !classScope->hasAttribute(ClassScope::HasDestructor, ar));

      if (Option::GenerateCPPMacros) {
        bool dyn = classScope->derivesFromRedeclaring() ==
          ClassScope::DirectFromRedeclared;
        bool idyn = parCls && classScope->derivesFromRedeclaring() ==
          ClassScope::IndirectFromRedeclared;
        bool redec = classScope->isRedeclaring();

        if (!parCls && !m_parent.empty()) {
          assert(dyn);
        }

        if (!classScope->derivesFromRedeclaring()) {
          outputCPPClassDecl(cg, ar, clsName, m_originalName.c_str(),
                             parCls ? parCls->getId().c_str()
                                    : "ObjectData");
        } else {
          cg_printf("DECLARE_DYNAMIC_CLASS(%s, %s, %s)\n", clsName,
                    m_originalName.c_str(),
                    dyn || !parCls ? "DynamicObjectData" :
                    parCls->getId().c_str());
        }

        if (classScope->checkHasPropTable()) {
          cg_printf("static const ClassPropTable %sprop_table;\n",
                    Option::ObjectStaticPrefix);
        }

        bool hasGet = classScope->getAttribute(
          ClassScope::HasUnknownPropGetter);
        bool hasSet = classScope->getAttribute(
          ClassScope::HasUnknownPropSetter);
        bool hasIsset = classScope->getAttribute(
          ClassScope::HasUnknownPropTester);
        bool hasUnset = classScope->getAttribute(
          ClassScope::HasPropUnsetter);
        bool hasCall = classScope->getAttribute(
          ClassScope::HasUnknownMethodHandler);
        bool hasCallStatic = classScope->getAttribute(
          ClassScope::HasUnknownStaticMethodHandler);

        bool hasRootParam =
          classScope->derivedByDynamic() && (redec || dyn || idyn);
        string lateInit = "";
        if (redec && classScope->derivedByDynamic()) {
          if (!dyn && !idyn && (!parCls || parCls->isUserClass())) {
            cg_printf("private: ObjectData* root;\n");
            cg_printf("public:\n");
            cg_printf("virtual ObjectData *getRoot() { return root; }\n");
            lateInit = "root(r ? r : this)";
          }
        }

        string callbacks = Option::ClassStaticsCallbackPrefix + clsNameStr;
        string conInit = "";
        if (dyn) {
          conInit = "DynamicObjectData(cb, \"" +
            CodeGenerator::EscapeLabel(m_parent) + "\", ";
          if (hasRootParam) {
            conInit += "r)";
          } else {
            conInit += "this)";
          }
        } else if (parCls) {
          conInit = string(Option::ClassPrefix) + parCls->getId() + "(";
          if (parCls->derivedByDynamic() &&
              (parCls->isRedeclaring() ||
               parCls->derivesFromRedeclaring() != ClassScope::FromNormal)) {
            if (hasRootParam) {
              conInit += "r ? r : ";
            }
            conInit += "this, ";
          }
          conInit += "cb)";
        } else {
          if (system) {
            conInit = "ExtObjectData(cb)";
          } else {
            if (hasRootParam) {
              conInit = "ObjectData(cb, r)";
            } else {
              conInit = "ObjectData(cb, false)";
            }
          }
        }

        cg_printf("%s%s(%sconst ObjectStaticCallbacks *cb = &%s%s) : %s",
                  Option::ClassPrefix,
                  clsName,
                  hasRootParam ? "ObjectData* r = NULL," : "",
                  callbacks.c_str(),
                  redec ? ".oscb" : "",
                  conInit.c_str());

        if (needsCppCtor) {
          cg_printf(", ");
          cg.setContext(CodeGenerator::CppConstructor);
          ASSERT(!cg.hasInitListFirstElem());
          m_stmt->outputCPP(cg, ar);
          cg.clearInitListFirstElem();
          cg.setContext(CodeGenerator::CppDeclaration);
        }
        if (!lateInit.empty()) {
          cg_printf(", %s", lateInit.c_str());
        }

        cg_indentBegin(" {%s",
                       hasGet || hasSet || hasIsset || hasUnset ||
                       hasCall || hasCallStatic || disableDestructor ||
                       hasRootParam ? "\n" : "");
        if (hasRootParam) {
          cg_printf("setId(r);\n");
        }
        if (hasGet) cg_printf("setAttribute(UseGet);\n");
        if (hasSet) cg_printf("setAttribute(UseSet);\n");
        if (hasIsset) cg_printf("setAttribute(UseIsset);\n");
        if (hasUnset) cg_printf("setAttribute(UseUnset);\n");
        if (hasCall) cg_printf("setAttribute(HasCall);\n");
        if (hasCallStatic) cg_printf("setAttribute(HasCallStatic);\n");
        if (disableDestructor) {
          cg_printf("if (!hhvm) setAttribute(NoDestructor);\n");
        }
        cg_indentEnd("}\n");
        hasEmitCppCtor = true;
      }

      if (needsCppCtor && !hasEmitCppCtor) {
        cg_printf("%s%s() : ", Option::ClassPrefix, clsName);
        cg.setContext(CodeGenerator::CppConstructor);
        ASSERT(!cg.hasInitListFirstElem());
        m_stmt->outputCPP(cg, ar);
        cg.clearInitListFirstElem();
        cg.setContext(CodeGenerator::CppDeclaration);
        cg_printf(" {%s}\n",
                  disableDestructor ?
                  " if (!hhvm) setAttribute(NoDestructor); " : "");
      }

      if (needsInit) {
        cg_printf("void init();\n");
      }

      // doCall
      if (classScope->getAttribute(ClassScope::HasUnknownMethodHandler)) {
        cg_printf("Variant doCall(Variant v_name, Variant v_arguments, "
                  "bool fatal);\n");
      }

      if (classScope->getAttribute(ClassScope::HasInvokeMethod)) {
        FunctionScopePtr func =
          classScope->findFunction(ar, "__invoke", false);
        ASSERT(func);
        if (!func->isAbstract()) {
          cg_printf("const CallInfo *"
                    "t___invokeCallInfoHelper(void *&extra);\n");
        }
      }

      if (classScope->isRedeclaring() &&
          !classScope->derivesFromRedeclaring() &&
          classScope->derivedByDynamic()) {
        cg_printf("Variant doRootCall(Variant v_name, Variant v_arguments, "
                  "bool fatal);\n");
      }

      if (m_stmt) m_stmt->outputCPP(cg, ar);
      {
        std::set<string> done;
        classScope->outputCPPStaticMethodWrappers(cg, ar, done, clsName);
      }
      if (Option::GenerateCPPMacros) {
        classScope->outputCPPJumpTableDecl(cg, ar);
      }
      cg_indentEnd("};\n");

      classScope->outputCPPDynamicClassDecl(cg);

      if (m_stmt) {
        cg.setContext(CodeGenerator::CppClassConstantsDecl);
        m_stmt->outputCPP(cg, ar);
        cg.setContext(CodeGenerator::CppDeclaration);
      }
    }
    break;
  case CodeGenerator::CppImplementation:
    {
      if (m_stmt) {
        cg.setContext(CodeGenerator::CppClassConstantsImpl);
        m_stmt->outputCPP(cg, ar);
        cg.setContext(CodeGenerator::CppImplementation);
      }

      classScope->outputCPPSupportMethodsImpl(cg, ar);

      bool needsInit = classScope->needsInitMethod();
      if (needsInit) {
        cg_indentBegin("void %s%s::init() {\n",
                       Option::ClassPrefix, clsName);
        if (!m_parent.empty()) {
          if (classScope->derivesFromRedeclaring() ==
              ClassScope::DirectFromRedeclared) {
            cg_printf("parent->init();\n");
          } else {
            ClassScopePtr parCls = ar->findClass(m_parent);
            cg_printf("%s%s::init();\n", Option::ClassPrefix,
                      parCls->getId().c_str());
          }
        }
        if (classScope->getVariables()->
            getAttribute(VariableTable::NeedGlobalPointer)) {
          cg.printDeclareGlobals();
        }
        cg.setContext(CodeGenerator::CppInitializer);
        if (m_stmt) m_stmt->outputCPP(cg, ar);

        // This is lame. Exception base class needs to prepare stacktrace
        // outside of its PHP constructor. Every subclass of exception also
        // needs this stacktrace, so we're adding an artificial __init__ in
        // exception.php and calling it here.
        if (m_name == "exception") {
          cg_printf("{CountableHelper h(this); t___init__();}\n");
        }

        cg_indentEnd("}\n");
      }

      cg.setContext(CodeGenerator::CppImplementation);
      if (m_stmt) m_stmt->outputCPP(cg, ar);
    }
    break;
  case CodeGenerator::CppFFIDecl:
  case CodeGenerator::CppFFIImpl:
    if (m_stmt) m_stmt->outputCPP(cg, ar);
    break;
  case CodeGenerator::JavaFFI:
    {
      if (classScope->isRedeclaring()) break;

      // TODO support PHP namespaces, once HPHP supports it
      string packageName = Option::JavaFFIRootPackage;
      string packageDir = packageName;
      Util::replaceAll(packageDir, ".", "/");

      string outputDir = ar->getOutputPath() + "/" + Option::FFIFilePrefix +
        packageDir + "/";
      Util::mkdir(outputDir);

      // uses a different cg to generate a separate file for each PHP class
      // also, uses the original capitalized class name
      string clsFile = outputDir + getOriginalName() + ".java";
      std::ofstream fcls(clsFile.c_str());
      CodeGenerator cgCls(&fcls, CodeGenerator::FileCPP);
      cgCls.setContext(CodeGenerator::JavaFFI);

      cgCls.printf("package %s;\n\n", packageName.c_str());
      cgCls.printf("import hphp.*;\n\n");

      printSource(cgCls);

      string clsModifier;
      switch (m_type) {
      case T_CLASS:
        break;
      case T_ABSTRACT:
        clsModifier = "abstract ";
        break;
      case T_FINAL:
        clsModifier = "final ";
        break;
      }
      cgCls.printf("public %sclass %s ", clsModifier.c_str(),
                   getOriginalName().c_str());

      ClassScopePtr parCls;
      if (!m_parent.empty()) parCls = ar->findClass(m_parent);
      if (!m_parent.empty() && classScope->derivesDirectlyFrom(m_parent)
          && parCls && parCls->isUserClass() && !parCls->isRedeclaring()) {
        // system classes are not supported in static FFI translation
        // they shouldn't appear as superclasses as well
        cgCls.printf("extends %s", parCls->getOriginalName().c_str());
      }
      else {
        cgCls.printf("extends HphpObject");
      }
      if (m_base) {
        bool first = true;
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && classScope->derivesFrom(ar, intf, false, false)
           && intfClassScope->isUserClass()) {
            if (first) {
              cgCls.printf(" implements ");
              first = false;
            }
            else {
              cgCls.printf(", ");
            }
            cgCls.printf(intfClassScope->getOriginalName().c_str());
          }
        }
      }

      cgCls.indentBegin(" {\n");

      // constructor for initializing the variant pointer
      cgCls.printf("protected %s(long ptr) { super(ptr); }\n\n",
                   getOriginalName().c_str());

      FunctionScopePtr cons = classScope->findConstructor(ar, true);
      if (cons && !cons->isAbstract() || m_type != T_ABSTRACT) {
        // if not an abstract class and not having an explicit constructor,
        // adds a default constructor
        outputJavaFFIConstructor(cgCls, ar, cons);
      }

      if (m_stmt) m_stmt->outputCPP(cgCls, ar);
      cgCls.indentEnd("}\n");

      fcls.close();
    }
    break;
  case CodeGenerator::JavaFFICppDecl:
  case CodeGenerator::JavaFFICppImpl:
    {
      if (classScope->isRedeclaring()) break;

      if (m_stmt) m_stmt->outputCPP(cg, ar);
      FunctionScopePtr cons = classScope->findConstructor(ar, true);
      if (cons && !cons->isAbstract() || m_type != T_ABSTRACT) {
        outputJavaFFICPPCreator(cg, ar, cons);
      }
    }
    break;
  default:
    ASSERT(false);
    break;
  }
}
void InterfaceStatement::outputCPPImpl(CodeGenerator &cg, AnalysisResultPtr ar) {
  ClassScopeRawPtr classScope = getClassScope();
  if (cg.getContext() == CodeGenerator::NoContext) {
    if (classScope->isVolatile()) {
      cg_printf("g->CDEC(%s) = true;\n", cg.formatLabel(m_name).c_str());
    }
    return;
  }

  string clsNameStr = classScope->getId(cg);
  const char *clsName = clsNameStr.c_str();

  switch (cg.getContext()) {
  case CodeGenerator::CppForwardDeclaration:
    if (Option::GenerateCPPMacros) {
      if (!Option::UseVirtualDispatch ||
          classScope->isRedeclaring()) {
        cg_printf("FORWARD_DECLARE_GENERIC_INTERFACE(%s);\n", clsName);
      } else {
        cg_printf("FORWARD_DECLARE_INTERFACE(%s);\n", clsName);
      }
    }
    break;
  case CodeGenerator::CppDeclaration:
    {
      printSource(cg);
      cg_printf("class %s%s", Option::ClassPrefix, clsName);
      if (m_base && Option::UseVirtualDispatch &&
          !classScope->isRedeclaring()) {
        const char *sep = " :";
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && !intfClassScope->isRedeclaring() &&
              classScope->derivesDirectlyFrom(ar, intf)) {
            string id = intfClassScope->getId(cg);
            cg_printf("%s public %s%s", sep, Option::ClassPrefix, id.c_str());
            sep = ",";
          }
        }
      }
      cg_indentBegin(" {\n");
      if (m_stmt) m_stmt->outputCPP(cg, ar);
      cg_indentEnd("};\n");
    }
    break;
  case CodeGenerator::CppImplementation:
    // do nothing
    break;
  case CodeGenerator::CppFFIDecl:
  case CodeGenerator::CppFFIImpl:
    // do nothing
    break;
  case CodeGenerator::JavaFFI:
    {
      // TODO support PHP namespaces, once HPHP supports it
      string packageName = Option::JavaFFIRootPackage;
      string packageDir = packageName;
      Util::replaceAll(packageDir, ".", "/");

      string outputDir = ar->getOutputPath() + "/" + Option::FFIFilePrefix +
        packageDir + "/";
      Util::mkdir(outputDir);

      // uses a different cg to generate a separate file for each PHP class
      string clsFile = outputDir + getOriginalName() + ".java";
      ofstream fcls(clsFile.c_str());
      CodeGenerator cgCls(&fcls, CodeGenerator::FileCPP);
      cgCls.setContext(CodeGenerator::JavaFFIInterface);

      cgCls.printf("package %s;\n\n", packageName.c_str());
      cgCls.printf("import hphp.*;\n\n");

      cgCls.printf("public interface %s", getOriginalName().c_str());
      if (m_base) {
        bool first = true;
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && classScope->derivesFrom(ar, intf, false, false)
           && intfClassScope->isUserClass()) {
            if (first) {
              cgCls.printf(" extends ");
              first = false;
            }
            else {
              cgCls.printf(", ");
            }
            cgCls.printf(intfClassScope->getOriginalName().c_str());
          }
        }
      }

      cgCls.indentBegin(" {\n");
      if (m_stmt) m_stmt->outputCPP(cgCls, ar);
      cgCls.indentEnd("}\n");

      fcls.close();
    }
    break;
  case CodeGenerator::JavaFFICppDecl:
  case CodeGenerator::JavaFFICppImpl:
    // do nothing
    break;
  default:
    ASSERT(false);
    break;
  }
}
bool DynamicFunctionCall::preOutputCPP(CodeGenerator &cg, AnalysisResultPtr ar,
                                       int state) {
    bool nonStatic = !m_class && m_className.empty();
    if (!nonStatic && !m_class && !m_classScope && !isRedeclared()) {
        // call to an unknown class
        // set m_noStatic to avoid pointlessly wrapping the call
        // in STATIC_CLASS_NAME_CALL()
        m_noStatic = true;
        cg.pushCallInfo(-1);
        bool ret = FunctionCall::preOutputCPP(cg, ar, state);
        cg.popCallInfo();
        return ret;
    }
    // Short circuit out if inExpression() returns false
    if (!cg.inExpression()) return true;

    cg.wrapExpressionBegin();

    m_ciTemp = cg.createNewLocalId(shared_from_this());

    if (!m_classScope && !m_className.empty() && m_cppTemp.empty() &&
            !isSelf() && ! isParent() && !isStatic()) {
        // Create a temporary to hold the class name, in case it is not a
        // StaticString.
        m_clsNameTemp = cg.createNewLocalId(shared_from_this());
        cg_printf("CStrRef clsName%d(", m_clsNameTemp);
        cg_printString(m_origClassName, ar, shared_from_this());
        cg_printf(");\n");
    }

    if (m_class) {
        int s = m_class->hasEffect() || m_nameExp->hasEffect() ?
                FixOrder : 0;
        m_class->preOutputCPP(cg, ar, s);
    }
    m_nameExp->preOutputCPP(cg, ar, 0);

    if (nonStatic) {
        cg_printf("const CallInfo *cit%d;\n", m_ciTemp);
        cg_printf("void *vt%d;\n", m_ciTemp);
        cg_printf("get_call_info_or_fail(cit%d, vt%d, ", m_ciTemp, m_ciTemp);

        if (m_nameExp->is(Expression::KindOfSimpleVariable)) {
            m_nameExp->outputCPP(cg, ar);
        } else {
            cg_printf("(");
            m_nameExp->outputCPP(cg, ar);
            cg_printf(")");
        }
        cg_printf(");\n");
    } else {
        cg_printf("MethodCallPackage mcp%d;\n", m_ciTemp);
        if (m_class) {
            if (m_class->is(KindOfScalarExpression)) {
                ASSERT(strcasecmp(dynamic_pointer_cast<ScalarExpression>(m_class)->
                                  getString().c_str(), "static") == 0);
                cg_printf("CStrRef cls%d = "
                          "FrameInjection::GetStaticClassName(fi.getThreadInfo())",
                          m_ciTemp);
            } else {
                cg_printf("C%sRef cls%d = ",
                          m_class->getActualType() &&
                          m_class->getActualType()->is(Type::KindOfString) ?
                          "Str" : "Var", m_ciTemp);
                m_class->outputCPP(cg, ar);
            }
        } else if (m_classScope) {
            cg_printf("CStrRef cls%d = ", m_ciTemp);
            cg_printString(m_classScope->getId(), ar, shared_from_this());
        } else {
            cg_printf("CStrRef cls%d = ", m_ciTemp);
            cg_printString(m_className, ar, shared_from_this());
        }
        cg_printf(";\n");

        cg_printf("CStrRef mth%d = ", m_ciTemp);
        if (m_nameExp->is(Expression::KindOfSimpleVariable)) {
            m_nameExp->outputCPP(cg, ar);
        } else {
            cg_printf("(");
            m_nameExp->outputCPP(cg, ar);
            cg_printf(")");
        }
        cg_printf(";\n");

        bool dynamic = true;
        if (!m_class) {
            ClassScopeRawPtr origClass = getOriginalClass();
            if (!origClass) {
                dynamic = false;
            } else {
                FunctionScopeRawPtr origFunc = getOriginalFunction();
                if (origFunc) {
                    if (origFunc->isStatic() ||
                            (m_classScope != origClass &&
                             (m_className.empty() || !origClass->derivesFrom(
                                  ar, m_className, true, true)))) {
                        dynamic = false;
                    }
                }
            }
        }

        if (dynamic) {
            if ((m_class && (!m_class->getActualType() ||
                             !m_class->getActualType()->is(Type::KindOfString))) ||
                    !getOriginalFunction() ||
                    !getOriginalClass() ||
                    getOriginalFunction()->isStatic()) {
                cg_printf("mcp%d.dynamicNamedCall(cls%d, mth%d);\n",
                          m_ciTemp, m_ciTemp, m_ciTemp);
            } else {
                cg_printf("mcp%d.isObj = true;\n", m_ciTemp);
                cg_printf("mcp%d.rootObj = this;\n", m_ciTemp);
                cg_printf("mcp%d.name = &mth%d;\n", m_ciTemp, m_ciTemp);
                cg_printf("o_get_call_info_ex(cls%d, mcp%d);\n", m_ciTemp, m_ciTemp);
            }
        } else {
            cg_printf("mcp%d.staticMethodCall(cls%d, mth%d);\n",
                      m_ciTemp,
                      m_ciTemp, m_ciTemp);

            if (m_classScope) {
                cg_printf("%s%s.%sget_call_info(mcp%d);\n",
                          Option::ClassStaticsCallbackPrefix,
                          m_classScope->getId().c_str(),
                          Option::ObjectStaticPrefix, m_ciTemp);
            } else if (isRedeclared()) {
                cg_printf("g->%s%s->%sget_call_info(mcp%d);\n",
                          Option::ClassStaticsCallbackPrefix, m_className.c_str(),
                          Option::ObjectStaticPrefix, m_ciTemp);
            } else {
                assert(false);
            }
        }
        cg_printf("const CallInfo *cit%d = mcp%d.ci;\n", m_ciTemp, m_ciTemp);
    }

    if (m_params && m_params->getCount() > 0) {
        cg.pushCallInfo(m_ciTemp);
        m_params->preOutputCPP(cg, ar, 0);
        cg.popCallInfo();
    }

    if (state & FixOrder) {
        cg.pushCallInfo(m_ciTemp);
        preOutputStash(cg, ar, state);
        cg.popCallInfo();
    }

    return true;
}
void InterfaceStatement::outputCPPImpl(CodeGenerator &cg,
                                       AnalysisResultPtr ar) {
  ClassScopeRawPtr classScope = getClassScope();
  if (cg.getContext() == CodeGenerator::NoContext) {
    if (classScope->isVolatile()) {
      const vector<string> &bases = classScope->getBases();
      for (unsigned i = 0; i < bases.size(); ++i) {
        const string &name = bases[i];
        if (cg.checkHoistedClass(name) ||
            classScope->hasKnownBase(i)) {
          continue;
        }
        ClassScopePtr base = ar->findClass(name);
        if (base && base->isVolatile()) {
          cg_printf("checkClassExistsThrow(");
          cg_printString(name, ar, shared_from_this());
          cg_printf(", &%s->CDEC(%s));\n",
                    cg.getGlobals(ar),
                    CodeGenerator::FormatLabel(base->getName()).c_str());
        }
      }
      classScope->outputCPPDef(cg);
      cg.addHoistedClass(m_name);
    }
    return;
  }

  string clsNameStr = classScope->getId();
  const char *clsName = clsNameStr.c_str();

  switch (cg.getContext()) {
  case CodeGenerator::CppDeclaration:
    {
      printSource(cg);
      if (Option::GenerateCPPMacros) {
        classScope->outputForwardDeclaration(cg);
      }
      if (classScope->isRedeclaring()) {
        classScope->outputCPPGlobalTableWrappersDecl(cg, ar);
      }
      cg_printf("class %s%s", Option::ClassPrefix, clsName);
      if (m_base && Option::UseVirtualDispatch &&
          !classScope->isRedeclaring()) {
        const char *sep = " :";
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && !intfClassScope->isRedeclaring() &&
              classScope->derivesDirectlyFrom(intf)) {
            string id = intfClassScope->getId();
            cg_printf("%s public %s%s", sep, Option::ClassPrefix, id.c_str());
            sep = ",";
          }
        }
      }
      cg_indentBegin(" {\n");
      if (m_stmt) m_stmt->outputCPP(cg, ar);

      bool hasPropTable = classScope->checkHasPropTable(ar);
      if (hasPropTable) {
        cg_printf("public: static const ClassPropTable %sprop_table;\n",
                  Option::ObjectStaticPrefix);
      }

      cg_indentEnd("};\n");
      if (hasPropTable) {
        classScope->outputCPPGlobalTableWrappersDecl(cg, ar);
      }
      if (m_stmt) {
        cg.setContext(CodeGenerator::CppClassConstantsDecl);
        m_stmt->outputCPP(cg, ar);
        cg.setContext(CodeGenerator::CppDeclaration);
      }
    }
    break;
  case CodeGenerator::CppImplementation:
    {
      if (m_stmt) {
        cg.setContext(CodeGenerator::CppClassConstantsImpl);
        m_stmt->outputCPP(cg, ar);
        cg.setContext(CodeGenerator::CppImplementation);
      }

      cg.addClass(getClassScope()->getName(), getClassScope());

      if (classScope->isRedeclaring() || classScope->checkHasPropTable(ar)) {
        classScope->outputCPPGlobalTableWrappersImpl(cg, ar);
      }
    }
    break;
  case CodeGenerator::CppFFIDecl:
  case CodeGenerator::CppFFIImpl:
    // do nothing
    break;
  case CodeGenerator::JavaFFI:
    {
      // TODO support PHP namespaces, once HPHP supports it
      string packageName = Option::JavaFFIRootPackage;
      string packageDir = packageName;
      Util::replaceAll(packageDir, ".", "/");

      string outputDir = ar->getOutputPath() + "/" + Option::FFIFilePrefix +
        packageDir + "/";
      Util::mkdir(outputDir);

      // uses a different cg to generate a separate file for each PHP class
      string clsFile = outputDir + getOriginalName() + ".java";
      std::ofstream fcls(clsFile.c_str());
      CodeGenerator cgCls(&fcls, CodeGenerator::FileCPP);
      cgCls.setContext(CodeGenerator::JavaFFIInterface);

      cgCls.printf("package %s;\n\n", packageName.c_str());
      cgCls.printf("import hphp.*;\n\n");

      cgCls.printf("public interface %s", getOriginalName().c_str());
      if (m_base) {
        bool first = true;
        for (int i = 0; i < m_base->getCount(); i++) {
          ScalarExpressionPtr exp =
            dynamic_pointer_cast<ScalarExpression>((*m_base)[i]);
          const char *intf = exp->getString().c_str();
          ClassScopePtr intfClassScope = ar->findClass(intf);
          if (intfClassScope && classScope->derivesFrom(ar, intf, false, false)
           && intfClassScope->isUserClass()) {
            if (first) {
              cgCls.printf(" extends ");
              first = false;
            }
            else {
              cgCls.printf(", ");
            }
            cgCls.printf(intfClassScope->getOriginalName().c_str());
          }
        }
      }

      cgCls.indentBegin(" {\n");
      if (m_stmt) m_stmt->outputCPP(cgCls, ar);
      cgCls.indentEnd("}\n");

      fcls.close();
    }
    break;
  case CodeGenerator::JavaFFICppDecl:
  case CodeGenerator::JavaFFICppImpl:
    // do nothing
    break;
  default:
    ASSERT(false);
    break;
  }
}