X-Git-Url: http://plrg.eecs.uci.edu/git/?p=folly.git;a=blobdiff_plain;f=folly%2Fdynamic-inl.h;h=7b187d7c88509df00f6fafc1bcc459c58fa982fd;hp=909c5b28204f664b4199bb631f686ff47b70e66c;hb=4bec077b3dc283e75125e9cf95fad89ca6617101;hpb=864eb2a656ecfe1c5a7ba05e7b5bd3b67db66ae5

diff --git a/folly/dynamic-inl.h b/folly/dynamic-inl.h
index 909c5b28..7b187d7c 100644
--- a/folly/dynamic-inl.h
+++ b/folly/dynamic-inl.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,24 +17,26 @@
 #pragma once
 
 #include <functional>
+
 #include <boost/iterator/iterator_adaptor.hpp>
 #include <boost/iterator/iterator_facade.hpp>
-#include <folly/Likely.h>
+
 #include <folly/Conv.h>
 #include <folly/Format.h>
+#include <folly/Likely.h>
 
 //////////////////////////////////////////////////////////////////////
 
 namespace std {
 
-template<>
-struct hash< ::folly::dynamic> {
+template <>
+struct hash<::folly::dynamic> {
   size_t operator()(::folly::dynamic const& d) const {
     return d.hash();
   }
 };
 
-}
+} // namespace std
 
 //////////////////////////////////////////////////////////////////////
 
@@ -44,7 +46,7 @@ struct hash< ::folly::dynamic> {
   do {                                \
     switch ((type)) {                 \
       case NULLT:                     \
-        apply(void*);                 \
+        apply(std::nullptr_t);        \
         break;                        \
       case ARRAY:                     \
         apply(Array);                 \
@@ -76,83 +78,57 @@ namespace folly {
 
 struct TypeError : std::runtime_error {
   explicit TypeError(const std::string& expected, dynamic::Type actual);
-  explicit TypeError(const std::string& expected,
-    dynamic::Type actual1, dynamic::Type actual2);
-  ~TypeError();
+  explicit TypeError(
+      const std::string& expected,
+      dynamic::Type actual1,
+      dynamic::Type actual2);
+  ~TypeError() override;
 };
 
+[[noreturn]] void throwTypeError_(
+    std::string const& expected,
+    dynamic::Type actual);
+[[noreturn]] void throwTypeError_(
+    std::string const& expected,
+    dynamic::Type actual1,
+    dynamic::Type actual2);
 
 //////////////////////////////////////////////////////////////////////
 
 namespace detail {
 
-  // This helper is used in destroy() to be able to run destructors on
-  // types like "int64_t" without a compiler error.
-  struct Destroy {
-    template<class T> static void destroy(T* t) { t->~T(); }
-  };
-
-  /*
-   * The enable_if junk here is necessary to avoid ambiguous
-   * conversions relating to bool and double when you implicitly
-   * convert an int or long to a dynamic.
-   */
-  template<class T, class Enable = void> struct ConversionHelper;
-  template<class T>
-  struct ConversionHelper<
-    T,
-    typename std::enable_if<
-      std::is_integral<T>::value && !std::is_same<T,bool>::value
-    >::type
-  > {
-    typedef int64_t type;
-  };
-  template <>
-  struct ConversionHelper<float> {
-    typedef double type;
-  };
+// This helper is used in destroy() to be able to run destructors on
+// types like "int64_t" without a compiler error.
+struct Destroy {
   template <class T>
-  struct ConversionHelper<
-      T,
-      typename std::enable_if<
-          (!std::is_integral<T>::value || std::is_same<T, bool>::value) &&
-          !std::is_same<T, float>::value &&
-          !std::is_same<T, std::nullptr_t>::value>::type> {
-    typedef T type;
-  };
-  template<class T>
-  struct ConversionHelper<
-    T,
-    typename std::enable_if<
-      std::is_same<T,std::nullptr_t>::value
-    >::type
-  > {
-    typedef void* type;
-  };
-
-  /*
-   * Helper for implementing numeric conversions in operators on
-   * numbers.  Just promotes to double when one of the arguments is
-   * double, or throws if either is not a numeric type.
-   */
-  template<template<class> class Op>
-  dynamic numericOp(dynamic const& a, dynamic const& b) {
-    if (!a.isNumber() || !b.isNumber()) {
-      throw TypeError("numeric", a.type(), b.type());
-    }
-    if (a.type() != b.type()) {
-      auto& integ  = a.isInt() ? a : b;
-      auto& nonint = a.isInt() ? b : a;
-      return Op<double>()(to<double>(integ.asInt()), nonint.asDouble());
-    }
-    if (a.isDouble()) {
-      return Op<double>()(a.asDouble(), b.asDouble());
-    }
-    return Op<int64_t>()(a.asInt(), b.asInt());
+  static void destroy(T* t) {
+    t->~T();
   }
+};
 
+/*
+ * Helper for implementing numeric conversions in operators on
+ * numbers.  Just promotes to double when one of the arguments is
+ * double, or throws if either is not a numeric type.
+ */
+template <template <class> class Op>
+dynamic numericOp(dynamic const& a, dynamic const& b) {
+  if (!a.isNumber() || !b.isNumber()) {
+    throwTypeError_("numeric", a.type(), b.type());
+  }
+  if (a.type() != b.type()) {
+    auto& integ = a.isInt() ? a : b;
+    auto& nonint = a.isInt() ? b : a;
+    return Op<double>()(to<double>(integ.asInt()), nonint.asDouble());
+  }
+  if (a.isDouble()) {
+    return Op<double>()(a.asDouble(), b.asDouble());
+  }
+  return Op<int64_t>()(a.asInt(), b.asInt());
 }
 
+} // namespace detail
+
 //////////////////////////////////////////////////////////////////////
 
 /*
@@ -173,12 +149,7 @@ struct dynamic::ObjectMaker {
   friend struct dynamic;
 
   explicit ObjectMaker() : val_(dynamic::object) {}
-  explicit ObjectMaker(dynamic const& key, dynamic val)
-    : val_(dynamic::object)
-  {
-    val_.insert(key, std::move(val));
-  }
-  explicit ObjectMaker(dynamic&& key, dynamic val)
+  explicit ObjectMaker(dynamic key, dynamic val)
     : val_(dynamic::object)
   {
     val_.insert(std::move(key), std::move(val));
@@ -191,20 +162,15 @@ struct dynamic::ObjectMaker {
   ObjectMaker& operator=(ObjectMaker const&) = delete;
   ObjectMaker& operator=(ObjectMaker&&) = delete;
 
-  // These return rvalue-references instead of lvalue-references to allow
-  // constructs like this to moved instead of copied:
+  // This returns an rvalue-reference instead of an lvalue-reference
+  // to allow constructs like this to moved instead of copied:
   //  dynamic a = dynamic::object("a", "b")("c", "d")
-  ObjectMaker&& operator()(dynamic const& key, dynamic val) {
-    val_.insert(key, std::move(val));
-    return std::move(*this);
-  }
-
-  ObjectMaker&& operator()(dynamic&& key, dynamic val) {
+  ObjectMaker&& operator()(dynamic key, dynamic val) {
     val_.insert(std::move(key), std::move(val));
     return std::move(*this);
   }
 
-private:
+ private:
   dynamic val_;
 };
 
@@ -212,36 +178,52 @@ inline void dynamic::array(EmptyArrayTag) {}
 
 template <class... Args>
 inline dynamic dynamic::array(Args&& ...args) {
-  return dynamic(Array{std::forward<Args>(args)...}, PrivateTag());
+  return dynamic(Array{std::forward<Args>(args)...});
 }
 
-// This looks like a case for perfect forwarding, but our use of
-// std::initializer_list for constructing dynamic arrays makes it less
-// functional than doing this manually.
-
-// TODO(ott, 10300209): When the initializer_list constructor is gone,
-// simplify this.
 inline dynamic::ObjectMaker dynamic::object() { return ObjectMaker(); }
-inline dynamic::ObjectMaker dynamic::object(dynamic&& a, dynamic&& b) {
+inline dynamic::ObjectMaker dynamic::object(dynamic a, dynamic b) {
   return ObjectMaker(std::move(a), std::move(b));
 }
-inline dynamic::ObjectMaker dynamic::object(dynamic const& a, dynamic&& b) {
-  return ObjectMaker(a, std::move(b));
-}
-inline dynamic::ObjectMaker dynamic::object(dynamic&& a, dynamic const& b) {
-  return ObjectMaker(std::move(a), b);
-}
-inline dynamic::ObjectMaker
-dynamic::object(dynamic const& a, dynamic const& b) {
-  return ObjectMaker(a, b);
-}
 
 //////////////////////////////////////////////////////////////////////
 
+struct dynamic::item_iterator : boost::iterator_adaptor<
+                                    dynamic::item_iterator,
+                                    dynamic::ObjectImpl::iterator> {
+  /* implicit */ item_iterator(base_type b) : iterator_adaptor_(b) {}
+
+  using object_type = dynamic::ObjectImpl;
+
+ private:
+  friend class boost::iterator_core_access;
+};
+
+struct dynamic::value_iterator : boost::iterator_adaptor<
+                                     dynamic::value_iterator,
+                                     dynamic::ObjectImpl::iterator,
+                                     dynamic> {
+  /* implicit */ value_iterator(base_type b) : iterator_adaptor_(b) {}
+
+  using object_type = dynamic::ObjectImpl;
+
+ private:
+  dynamic& dereference() const {
+    return base_reference()->second;
+  }
+  friend class boost::iterator_core_access;
+};
+
 struct dynamic::const_item_iterator
   : boost::iterator_adaptor<dynamic::const_item_iterator,
                             dynamic::ObjectImpl::const_iterator> {
   /* implicit */ const_item_iterator(base_type b) : iterator_adaptor_(b) { }
+  /* implicit */ const_item_iterator(item_iterator i)
+      : iterator_adaptor_(i.base()) {}
+  /* implicit */ const_item_iterator(dynamic::ObjectImpl::iterator i)
+      : iterator_adaptor_(i) {}
+
+  using object_type = dynamic::ObjectImpl const;
 
  private:
   friend class boost::iterator_core_access;
@@ -253,6 +235,8 @@ struct dynamic::const_key_iterator
                             dynamic const> {
   /* implicit */ const_key_iterator(base_type b) : iterator_adaptor_(b) { }
 
+  using object_type = dynamic::ObjectImpl const;
+
  private:
   dynamic const& dereference() const {
     return base_reference()->first;
@@ -265,6 +249,12 @@ struct dynamic::const_value_iterator
                             dynamic::ObjectImpl::const_iterator,
                             dynamic const> {
   /* implicit */ const_value_iterator(base_type b) : iterator_adaptor_(b) { }
+  /* implicit */ const_value_iterator(value_iterator i)
+      : iterator_adaptor_(i.base()) {}
+  /* implicit */ const_value_iterator(dynamic::ObjectImpl::iterator i)
+      : iterator_adaptor_(i) {}
+
+  using object_type = dynamic::ObjectImpl const;
 
  private:
   dynamic const& dereference() const {
@@ -275,6 +265,10 @@ struct dynamic::const_value_iterator
 
 //////////////////////////////////////////////////////////////////////
 
+inline dynamic::dynamic() : dynamic(nullptr) {}
+
+inline dynamic::dynamic(std::nullptr_t) : type_(NULLT) {}
+
 inline dynamic::dynamic(void (*)(EmptyArrayTag))
   : type_(ARRAY)
 {
@@ -299,24 +293,12 @@ inline dynamic::dynamic(char const* s)
   new (&u_.string) std::string(s);
 }
 
-inline dynamic::dynamic(std::string const& s)
+inline dynamic::dynamic(std::string s)
   : type_(STRING)
 {
-  new (&u_.string) std::string(s);
-}
-
-inline dynamic::dynamic(std::string&& s) : type_(STRING) {
   new (&u_.string) std::string(std::move(s));
 }
 
-inline dynamic::dynamic(std::initializer_list<dynamic> il)
-    : dynamic(Array(std::move(il)), PrivateTag()) {}
-
-inline dynamic& dynamic::operator=(std::initializer_list<dynamic> il) {
-  (*this) = dynamic(Array(std::move(il)), PrivateTag());
-  return *this;
-}
-
 inline dynamic::dynamic(ObjectMaker&& maker)
   : type_(OBJECT)
 {
@@ -338,14 +320,37 @@ inline dynamic::dynamic(dynamic&& o) noexcept
 
 inline dynamic::~dynamic() noexcept { destroy(); }
 
-template<class T>
+// Integral types except bool convert to int64_t, float types to double.
+template <class T>
+struct dynamic::NumericTypeHelper<
+    T, typename std::enable_if<std::is_integral<T>::value>::type> {
+  static_assert(
+      !kIsObjC || sizeof(T) > sizeof(char),
+      "char-sized types are ambiguous in objc; cast to bool or wider type");
+  using type = int64_t;
+};
+template <>
+struct dynamic::NumericTypeHelper<bool> {
+  using type = bool;
+};
+template <>
+struct dynamic::NumericTypeHelper<float> {
+  using type = double;
+};
+template <>
+struct dynamic::NumericTypeHelper<double> {
+  using type = double;
+};
+
+template <
+    class T,
+    class NumericType /* = typename NumericTypeHelper<T>::type */>
 dynamic::dynamic(T t) {
-  typedef typename detail::ConversionHelper<T>::type U;
-  type_ = TypeInfo<U>::type;
-  new (getAddress<U>()) U(std::move(t));
+  type_ = TypeInfo<NumericType>::type;
+  new (getAddress<NumericType>()) NumericType(NumericType(t));
 }
 
-template<class Iterator>
+template <class Iterator>
 dynamic::dynamic(Iterator first, Iterator last)
   : type_(ARRAY)
 {
@@ -361,12 +366,20 @@ inline dynamic::const_iterator dynamic::end() const {
   return get<Array>().end();
 }
 
+inline dynamic::iterator dynamic::begin() {
+  return get<Array>().begin();
+}
+inline dynamic::iterator dynamic::end() {
+  return get<Array>().end();
+}
+
 template <class It>
 struct dynamic::IterableProxy {
-  typedef It const_iterator;
+  typedef It iterator;
   typedef typename It::value_type value_type;
+  typedef typename It::object_type object_type;
 
-  /* implicit */ IterableProxy(const dynamic::ObjectImpl* o) : o_(o) { }
+  /* implicit */ IterableProxy(object_type* o) : o_(o) {}
 
   It begin() const {
     return o_->begin();
@@ -377,7 +390,7 @@ struct dynamic::IterableProxy {
   }
 
  private:
-  const dynamic::ObjectImpl* o_;
+  object_type* o_;
 };
 
 inline dynamic::IterableProxy<dynamic::const_key_iterator> dynamic::keys()
@@ -395,16 +408,38 @@ inline dynamic::IterableProxy<dynamic::const_item_iterator> dynamic::items()
   return &(get<ObjectImpl>());
 }
 
+inline dynamic::IterableProxy<dynamic::value_iterator> dynamic::values() {
+  return &(get<ObjectImpl>());
+}
+
+inline dynamic::IterableProxy<dynamic::item_iterator> dynamic::items() {
+  return &(get<ObjectImpl>());
+}
+
 inline bool dynamic::isString() const {
-  return get_nothrow<std::string>();
+  return get_nothrow<std::string>() != nullptr;
+}
+inline bool dynamic::isObject() const {
+  return get_nothrow<ObjectImpl>() != nullptr;
+}
+inline bool dynamic::isBool() const {
+  return get_nothrow<bool>() != nullptr;
+}
+inline bool dynamic::isArray() const {
+  return get_nothrow<Array>() != nullptr;
+}
+inline bool dynamic::isDouble() const {
+  return get_nothrow<double>() != nullptr;
+}
+inline bool dynamic::isInt() const {
+  return get_nothrow<int64_t>() != nullptr;
+}
+inline bool dynamic::isNull() const {
+  return get_nothrow<std::nullptr_t>() != nullptr;
+}
+inline bool dynamic::isNumber() const {
+  return isInt() || isDouble();
 }
-inline bool dynamic::isObject() const { return get_nothrow<ObjectImpl>(); }
-inline bool dynamic::isBool()   const { return get_nothrow<bool>(); }
-inline bool dynamic::isArray()  const { return get_nothrow<Array>(); }
-inline bool dynamic::isDouble() const { return get_nothrow<double>(); }
-inline bool dynamic::isInt()    const { return get_nothrow<int64_t>(); }
-inline bool dynamic::isNull()   const { return get_nothrow<void*>(); }
-inline bool dynamic::isNumber() const { return isInt() || isDouble(); }
 
 inline dynamic::Type dynamic::type() const {
   return type_;
@@ -454,17 +489,23 @@ inline StringPiece dynamic::stringPiece() const {
   return get<std::string>();
 }
 
-template<class T>
+template <class T>
 struct dynamic::CompareOp {
   static bool comp(T const& a, T const& b) { return a < b; }
 };
-template<>
+template <>
 struct dynamic::CompareOp<dynamic::ObjectImpl> {
   static bool comp(ObjectImpl const&, ObjectImpl const&) {
     // This code never executes; it is just here for the compiler.
     return false;
   }
 };
+template <>
+struct dynamic::CompareOp<std::nullptr_t> {
+  static bool comp(std::nullptr_t const&, std::nullptr_t const&) {
+    return true;
+  }
+};
 
 inline dynamic& dynamic::operator+=(dynamic const& o) {
   if (type() == STRING && o.type() == STRING) {
@@ -490,13 +531,13 @@ inline dynamic& dynamic::operator/=(dynamic const& o) {
   return *this;
 }
 
-#define FB_DYNAMIC_INTEGER_OP(op)                           \
-  inline dynamic& dynamic::operator op(dynamic const& o) {  \
-    if (!isInt() || !o.isInt()) {                           \
-      throw TypeError("int64", type(), o.type());           \
-    }                                                       \
-    *getAddress<int64_t>() op o.asInt();                    \
-    return *this;                                           \
+#define FB_DYNAMIC_INTEGER_OP(op)                          \
+  inline dynamic& dynamic::operator op(dynamic const& o) { \
+    if (!isInt() || !o.isInt()) {                          \
+      throwTypeError_("int64", type(), o.type());          \
+    }                                                      \
+    *getAddress<int64_t>() op o.asInt();                   \
+    return *this;                                          \
   }
 
 FB_DYNAMIC_INTEGER_OP(%=)
@@ -524,19 +565,19 @@ inline dynamic&& dynamic::operator[](dynamic const& idx) && {
   return std::move((*this)[idx]);
 }
 
-template<class K, class V> inline dynamic& dynamic::setDefault(K&& k, V&& v) {
+template <class K, class V> inline dynamic& dynamic::setDefault(K&& k, V&& v) {
   auto& obj = get<ObjectImpl>();
   return obj.insert(std::make_pair(std::forward<K>(k),
                                    std::forward<V>(v))).first->second;
 }
 
-template<class K> inline dynamic& dynamic::setDefault(K&& k, dynamic&& v) {
+template <class K> inline dynamic& dynamic::setDefault(K&& k, dynamic&& v) {
   auto& obj = get<ObjectImpl>();
   return obj.insert(std::make_pair(std::forward<K>(k),
                                    std::move(v))).first->second;
 }
 
-template<class K> inline dynamic& dynamic::setDefault(K&& k, const dynamic& v) {
+template <class K> inline dynamic& dynamic::setDefault(K&& k, const dynamic& v) {
   auto& obj = get<ObjectImpl>();
   return obj.insert(std::make_pair(std::forward<K>(k), v)).first->second;
 }
@@ -561,14 +602,17 @@ inline bool dynamic::empty() const {
 }
 
 inline std::size_t dynamic::count(dynamic const& key) const {
-  return find(key) != items().end();
+  return find(key) != items().end() ? 1u : 0u;
 }
 
 inline dynamic::const_item_iterator dynamic::find(dynamic const& key) const {
   return get<ObjectImpl>().find(key);
 }
+inline dynamic::item_iterator dynamic::find(dynamic const& key) {
+  return get<ObjectImpl>().find(key);
+}
 
-template<class K, class V> inline void dynamic::insert(K&& key, V&& val) {
+template <class K, class V> inline void dynamic::insert(K&& key, V&& val) {
   auto& obj = get<ObjectImpl>();
   auto rv = obj.insert({ std::forward<K>(key), nullptr });
   rv.first->second = std::forward<V>(val);
@@ -576,7 +620,7 @@ template<class K, class V> inline void dynamic::insert(K&& key, V&& val) {
 
 inline void dynamic::update(const dynamic& mergeObj) {
   if (!isObject() || !mergeObj.isObject()) {
-    throw TypeError("object", type(), mergeObj.type());
+    throwTypeError_("object", type(), mergeObj.type());
   }
 
   for (const auto& pair : mergeObj.items()) {
@@ -586,7 +630,7 @@ inline void dynamic::update(const dynamic& mergeObj) {
 
 inline void dynamic::update_missing(const dynamic& mergeObj1) {
   if (!isObject() || !mergeObj1.isObject()) {
-    throw TypeError("object", type(), mergeObj1.type());
+    throwTypeError_("object", type(), mergeObj1.type());
   }
 
   // Only add if not already there
@@ -614,7 +658,7 @@ inline std::size_t dynamic::erase(dynamic const& key) {
   return obj.erase(key);
 }
 
-inline dynamic::const_iterator dynamic::erase(const_iterator it) {
+inline dynamic::iterator dynamic::erase(const_iterator it) {
   auto& arr = get<Array>();
   // std::vector doesn't have an erase method that works on const iterators,
   // even though the standard says it should, so this hack converts to a
@@ -626,30 +670,31 @@ inline dynamic::const_key_iterator dynamic::erase(const_key_iterator it) {
   return const_key_iterator(get<ObjectImpl>().erase(it.base()));
 }
 
-inline dynamic::const_key_iterator dynamic::erase(const_key_iterator first,
-                                                  const_key_iterator last) {
+inline dynamic::const_key_iterator dynamic::erase(
+    const_key_iterator first,
+    const_key_iterator last) {
   return const_key_iterator(get<ObjectImpl>().erase(first.base(),
                                                     last.base()));
 }
 
-inline dynamic::const_value_iterator dynamic::erase(const_value_iterator it) {
-  return const_value_iterator(get<ObjectImpl>().erase(it.base()));
+inline dynamic::value_iterator dynamic::erase(const_value_iterator it) {
+  return value_iterator(get<ObjectImpl>().erase(it.base()));
 }
 
-inline dynamic::const_value_iterator dynamic::erase(const_value_iterator first,
-                                                    const_value_iterator last) {
-  return const_value_iterator(get<ObjectImpl>().erase(first.base(),
-                                                      last.base()));
+inline dynamic::value_iterator dynamic::erase(
+    const_value_iterator first,
+    const_value_iterator last) {
+  return value_iterator(get<ObjectImpl>().erase(first.base(), last.base()));
 }
 
-inline dynamic::const_item_iterator dynamic::erase(const_item_iterator it) {
-  return const_item_iterator(get<ObjectImpl>().erase(it.base()));
+inline dynamic::item_iterator dynamic::erase(const_item_iterator it) {
+  return item_iterator(get<ObjectImpl>().erase(it.base()));
 }
 
-inline dynamic::const_item_iterator dynamic::erase(const_item_iterator first,
-                                                   const_item_iterator last) {
-  return const_item_iterator(get<ObjectImpl>().erase(first.base(),
-                                                     last.base()));
+inline dynamic::item_iterator dynamic::erase(
+    const_item_iterator first,
+    const_item_iterator last) {
+  return item_iterator(get<ObjectImpl>().erase(first.base(), last.base()));
 }
 
 inline void dynamic::resize(std::size_t sz, dynamic const& c) {
@@ -674,7 +719,7 @@ inline void dynamic::pop_back() {
 
 //////////////////////////////////////////////////////////////////////
 
-inline dynamic::dynamic(Array&& r, PrivateTag) : type_(ARRAY) {
+inline dynamic::dynamic(Array&& r) : type_(ARRAY) {
   new (&u_.array) Array(std::move(r));
 }
 
@@ -685,9 +730,9 @@ inline dynamic::dynamic(Array&& r, PrivateTag) : type_(ARRAY) {
   }; \
   //
 
-FOLLY_DYNAMIC_DEC_TYPEINFO(void*,               "null",    dynamic::NULLT)
+FOLLY_DYNAMIC_DEC_TYPEINFO(std::nullptr_t,      "null",    dynamic::NULLT)
 FOLLY_DYNAMIC_DEC_TYPEINFO(bool,                "boolean", dynamic::BOOL)
-FOLLY_DYNAMIC_DEC_TYPEINFO(std::string, "string", dynamic::STRING)
+FOLLY_DYNAMIC_DEC_TYPEINFO(std::string,         "string",  dynamic::STRING)
 FOLLY_DYNAMIC_DEC_TYPEINFO(dynamic::Array,      "array",   dynamic::ARRAY)
 FOLLY_DYNAMIC_DEC_TYPEINFO(double,              "double",  dynamic::DOUBLE)
 FOLLY_DYNAMIC_DEC_TYPEINFO(int64_t,             "int64",   dynamic::INT64)
@@ -695,7 +740,7 @@ FOLLY_DYNAMIC_DEC_TYPEINFO(dynamic::ObjectImpl, "object",  dynamic::OBJECT)
 
 #undef FOLLY_DYNAMIC_DEC_TYPEINFO
 
-template<class T>
+template <class T>
 T dynamic::asImpl() const {
   switch (type()) {
   case INT64:    return to<T>(*get_nothrow<int64_t>());
@@ -704,12 +749,12 @@ T dynamic::asImpl() const {
   case STRING:
     return to<T>(*get_nothrow<std::string>());
   default:
-    throw TypeError("int/double/bool/string", type());
+    throwTypeError_("int/double/bool/string", type());
   }
 }
 
 // Return a T* to our type, or null if we're not that type.
-template<class T>
+template <class T>
 T* dynamic::get_nothrow() & noexcept {
   if (type_ != TypeInfo<T>::type) {
     return nullptr;
@@ -717,37 +762,37 @@ T* dynamic::get_nothrow() & noexcept {
   return getAddress<T>();
 }
 
-template<class T>
+template <class T>
 T const* dynamic::get_nothrow() const& noexcept {
   return const_cast<dynamic*>(this)->get_nothrow<T>();
 }
 
 // Return T* for where we can put a T, without type checking.  (Memory
 // might be uninitialized, even.)
-template<class T>
+template <class T>
 T* dynamic::getAddress() noexcept {
   return GetAddrImpl<T>::get(u_);
 }
 
-template<class T>
+template <class T>
 T const* dynamic::getAddress() const noexcept {
   return const_cast<dynamic*>(this)->getAddress<T>();
 }
 
-template<class T> struct dynamic::GetAddrImpl {};
-template<> struct dynamic::GetAddrImpl<void*> {
-  static void** get(Data& d) noexcept { return &d.nul; }
+template <class T> struct dynamic::GetAddrImpl {};
+template <> struct dynamic::GetAddrImpl<std::nullptr_t> {
+  static std::nullptr_t* get(Data& d) noexcept { return &d.nul; }
 };
-template<> struct dynamic::GetAddrImpl<dynamic::Array> {
+template <> struct dynamic::GetAddrImpl<dynamic::Array> {
   static Array* get(Data& d) noexcept { return &d.array; }
 };
-template<> struct dynamic::GetAddrImpl<bool> {
+template <> struct dynamic::GetAddrImpl<bool> {
   static bool* get(Data& d) noexcept { return &d.boolean; }
 };
-template<> struct dynamic::GetAddrImpl<int64_t> {
+template <> struct dynamic::GetAddrImpl<int64_t> {
   static int64_t* get(Data& d) noexcept { return &d.integer; }
 };
-template<> struct dynamic::GetAddrImpl<double> {
+template <> struct dynamic::GetAddrImpl<double> {
   static double* get(Data& d) noexcept { return &d.doubl; }
 };
 template <>
@@ -756,7 +801,7 @@ struct dynamic::GetAddrImpl<std::string> {
     return &d.string;
   }
 };
-template<> struct dynamic::GetAddrImpl<dynamic::ObjectImpl> {
+template <> struct dynamic::GetAddrImpl<dynamic::ObjectImpl> {
   static_assert(sizeof(ObjectImpl) <= sizeof(Data::objectBuffer),
     "In your implementation, std::unordered_map<> apparently takes different"
     " amount of space depending on its template parameters.  This is "
@@ -768,15 +813,15 @@ template<> struct dynamic::GetAddrImpl<dynamic::ObjectImpl> {
   }
 };
 
-template<class T>
+template <class T>
 T& dynamic::get() {
   if (auto* p = get_nothrow<T>()) {
     return *p;
   }
-  throw TypeError(TypeInfo<T>::name, type());
+  throwTypeError_(TypeInfo<T>::name, type());
 }
 
-template<class T>
+template <class T>
 T const& dynamic::get() const {
   return const_cast<dynamic*>(this)->get<T>();
 }
@@ -787,7 +832,7 @@ T const& dynamic::get() const {
  * Helper for implementing operator<<.  Throws if the type shouldn't
  * support it.
  */
-template<class T>
+template <class T>
 struct dynamic::PrintImpl {
   static void print(dynamic const&, std::ostream& out, T const& t) {
     out << t;
@@ -795,15 +840,14 @@ struct dynamic::PrintImpl {
 };
 // Otherwise, null, being (void*)0, would print as 0.
 template <>
-struct dynamic::PrintImpl<void*> {
+struct dynamic::PrintImpl<std::nullptr_t> {
   static void print(dynamic const& /* d */,
                     std::ostream& out,
-                    void* const& nul) {
-    DCHECK_EQ((void*)0, nul);
+                    std::nullptr_t const&) {
     out << "null";
   }
 };
-template<>
+template <>
 struct dynamic::PrintImpl<dynamic::ObjectImpl> {
   static void print(dynamic const& d,
                     std::ostream& out,
@@ -811,7 +855,7 @@ struct dynamic::PrintImpl<dynamic::ObjectImpl> {
     d.print_as_pseudo_json(out);
   }
 };
-template<>
+template <>
 struct dynamic::PrintImpl<dynamic::Array> {
   static void print(dynamic const& d,
                     std::ostream& out,
@@ -915,6 +959,6 @@ class FormatValue<detail::DefaultValueWrapper<dynamic, V>> {
   const detail::DefaultValueWrapper<dynamic, V>& val_;
 };
 
-}  // namespaces
+} // namespace folly
 
 #undef FB_DYNAMIC_APPLY