/*
- * Copyright 2012 Facebook, Inc.
+ * Copyright 2015 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#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>
+#include <folly/Conv.h>
+#include <folly/Format.h>
//////////////////////////////////////////////////////////////////////
namespace folly {
+struct TypeError : std::runtime_error {
+ explicit TypeError(const std::string& expected, dynamic::Type actual)
+ : std::runtime_error(to<std::string>("TypeError: expected dynamic "
+ "type `", expected, '\'', ", but had type `",
+ dynamic::typeName(actual), '\''))
+ {}
+ explicit TypeError(const std::string& expected,
+ dynamic::Type actual1, dynamic::Type actual2)
+ : std::runtime_error(to<std::string>("TypeError: expected dynamic "
+ "types `", expected, '\'', ", but had types `",
+ dynamic::typeName(actual1), "' and `", dynamic::typeName(actual2),
+ '\''))
+ {}
+};
+
+
//////////////////////////////////////////////////////////////////////
namespace detail {
//////////////////////////////////////////////////////////////////////
-struct TypeError : std::runtime_error {
- explicit TypeError(const std::string& expected, dynamic::Type actual)
- : std::runtime_error(to<std::string>("TypeError: expected dynamic "
- "type `", expected, '\'', ", but had type `",
- dynamic::typeName(actual), '\''))
- {}
- explicit TypeError(const std::string& expected,
- dynamic::Type actual1, dynamic::Type actual2)
- : std::runtime_error(to<std::string>("TypeError: expected dynamic "
- "types `", expected, '\'', ", but had types `",
- dynamic::typeName(actual1), "' and `", dynamic::typeName(actual2),
- '\''))
- {}
-};
-
/*
* We're doing this instead of a simple member typedef to avoid the
* undefined behavior of parameterizing std::unordered_map<> with an
dynamic val_;
};
-template<class... Args>
-inline dynamic::ObjectMaker dynamic::object(Args&&... args) {
- return dynamic::ObjectMaker(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.
+inline dynamic::ObjectMaker dynamic::object() { return ObjectMaker(); }
+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);
}
//////////////////////////////////////////////////////////////////////
new (getAddress<ObjectImpl>()) ObjectImpl();
}
+inline dynamic::dynamic(StringPiece s)
+ : type_(STRING)
+{
+ new (&u_.string) fbstring(s.data(), s.size());
+}
+
inline dynamic::dynamic(char const* s)
: type_(STRING)
{
new (&u_.string) fbstring(s);
}
+inline dynamic::dynamic(fbstring const& s)
+ : type_(STRING)
+{
+ new (&u_.string) fbstring(s);
+}
+
+inline dynamic::dynamic(fbstring&& s)
+ : type_(STRING)
+{
+ new (&u_.string) fbstring(std::move(s));
+}
+
inline dynamic::dynamic(std::initializer_list<dynamic> il)
: type_(ARRAY)
{
*this = o;
}
-inline dynamic::dynamic(dynamic&& o)
+inline dynamic::dynamic(dynamic&& o) noexcept
: type_(NULLT)
{
*this = std::move(o);
}
-inline dynamic::~dynamic() { destroy(); }
+inline dynamic::~dynamic() noexcept { destroy(); }
template<class T>
dynamic::dynamic(T t) {
template <class It>
struct dynamic::IterableProxy {
typedef It const_iterator;
+ typedef typename It::value_type value_type;
/* implicit */ IterableProxy(const dynamic::ObjectImpl* o) : o_(o) { }
inline int64_t dynamic::asInt() const { return asImpl<int64_t>(); }
inline bool dynamic::asBool() const { return asImpl<bool>(); }
+inline const fbstring& dynamic::getString() const { return get<fbstring>(); }
+inline double dynamic::getDouble() const { return get<double>(); }
+inline int64_t dynamic::getInt() const { return get<int64_t>(); }
+inline bool dynamic::getBool() const { return get<bool>(); }
+
+inline fbstring& dynamic::getString() { return get<fbstring>(); }
+inline double& dynamic::getDouble() { return get<double>(); }
+inline int64_t& dynamic::getInt() { return get<int64_t>(); }
+inline bool& dynamic::getBool() { return get<bool>(); }
+
+inline const char* dynamic::data() const { return get<fbstring>().data(); }
+inline const char* dynamic::c_str() const { return get<fbstring>().c_str(); }
+inline StringPiece dynamic::stringPiece() const { return get<fbstring>(); }
+
template<class T>
struct dynamic::CompareOp {
static bool comp(T const& a, T const& b) { return a < b; }
return *this;
}
-inline dynamic& dynamic::operator=(dynamic&& o) {
+inline dynamic& dynamic::operator=(dynamic&& o) noexcept {
if (&o != this) {
destroy();
#define FB_X(T) new (getAddress<T>()) T(std::move(*o.getAddress<T>()))
std::forward<V>(v))).first->second;
}
-inline dynamic const& dynamic::at(dynamic const& idx) const {
- return const_cast<dynamic*>(this)->at(idx);
+inline dynamic* dynamic::get_ptr(dynamic const& idx) {
+ return const_cast<dynamic*>(const_cast<dynamic const*>(this)->get_ptr(idx));
}
-inline dynamic& dynamic::at(dynamic const& idx) {
- if (!isObject() && !isArray()) {
+inline const dynamic* dynamic::get_ptr(dynamic const& idx) const {
+ if (auto* parray = get_nothrow<Array>()) {
+ if (!idx.isInt()) {
+ throw TypeError("int64", idx.type());
+ }
+ if (idx >= parray->size()) {
+ return nullptr;
+ }
+ return &(*parray)[idx.asInt()];
+ } else if (auto* pobject = get_nothrow<ObjectImpl>()) {
+ auto it = pobject->find(idx);
+ if (it == pobject->end()) {
+ return nullptr;
+ }
+ return &it->second;
+ } else {
throw TypeError("object/array", type());
}
+}
+
+inline dynamic& dynamic::at(dynamic const& idx) {
+ return const_cast<dynamic&>(const_cast<dynamic const*>(this)->at(idx));
+}
+inline dynamic const& dynamic::at(dynamic const& idx) const {
if (auto* parray = get_nothrow<Array>()) {
- if (idx >= parray->size()) {
- throw std::out_of_range("out of range in dynamic array");
- }
if (!idx.isInt()) {
throw TypeError("int64", idx.type());
}
+ if (idx >= parray->size()) {
+ throw std::out_of_range("out of range in dynamic array");
+ }
return (*parray)[idx.asInt()];
+ } else if (auto* pobject = get_nothrow<ObjectImpl>()) {
+ auto it = pobject->find(idx);
+ if (it == pobject->end()) {
+ throw std::out_of_range(to<std::string>(
+ "couldn't find key ", idx.asString(), " in dynamic object"));
+ }
+ return it->second;
+ } else {
+ throw TypeError("object/array", type());
}
-
- auto* pobj = get_nothrow<ObjectImpl>();
- assert(pobj);
- auto it = find(idx);
- if (it == items().end()) {
- throw std::out_of_range(to<std::string>(
- "couldn't find key ", idx.asString(), " in dynamic object"));
- }
- return const_cast<dynamic&>(it->second);
}
inline bool dynamic::empty() const {
template<class K, class V> inline void dynamic::insert(K&& key, V&& val) {
auto& obj = get<ObjectImpl>();
- auto rv = obj.insert(std::make_pair(std::forward<K>(key),
- std::forward<V>(val)));
- if (!rv.second) {
- // note, the second use of std:forward<V>(val) is only correct
- // if the first one did not result in a move. obj[key] = val
- // would be preferrable but doesn't compile because dynamic
- // is (intentionally) not default constructable
- rv.first->second = std::forward<V>(val);
- }
+ auto rv = obj.insert({ std::forward<K>(key), nullptr });
+ rv.first->second = std::forward<V>(val);
}
inline std::size_t dynamic::erase(dynamic const& key) {
}
inline dynamic::const_iterator dynamic::erase(const_iterator it) {
- return get<Array>().erase(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
+ // non-const iterator before calling erase.
+ return get<Array>().erase(arr.begin() + (it - arr.begin()));
}
inline dynamic::const_iterator
dynamic::erase(const_iterator first, const_iterator last) {
- return get<Array>().erase(first, last);
+ auto& arr = get<Array>();
+ return get<Array>().erase(
+ arr.begin() + (first - arr.begin()),
+ arr.begin() + (last - arr.begin()));
}
inline dynamic::const_key_iterator dynamic::erase(const_key_iterator it) {
array.push_back(std::move(v));
}
+inline void dynamic::pop_back() {
+ auto& array = get<Array>();
+ array.pop_back();
+}
+
inline std::size_t dynamic::hash() const {
switch (type()) {
case OBJECT:
static Type const type;
};
+#define FB_DEC_TYPE(T) \
+ template<> char const dynamic::TypeInfo<T>::name[]; \
+ template<> dynamic::Type const dynamic::TypeInfo<T>::type
+
+FB_DEC_TYPE(void*);
+FB_DEC_TYPE(bool);
+FB_DEC_TYPE(fbstring);
+FB_DEC_TYPE(dynamic::Array);
+FB_DEC_TYPE(double);
+FB_DEC_TYPE(int64_t);
+FB_DEC_TYPE(dynamic::ObjectImpl);
+
+#undef FB_DEC_TYPE
+
template<class T>
T dynamic::asImpl() const {
switch (type()) {
// Return a T* to our type, or null if we're not that type.
template<class T>
-T* dynamic::get_nothrow() {
+T* dynamic::get_nothrow() noexcept {
if (type_ != TypeInfo<T>::type) {
return nullptr;
}
}
template<class T>
-T const* dynamic::get_nothrow() const {
+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>
-T* dynamic::getAddress() {
+T* dynamic::getAddress() noexcept {
return GetAddrImpl<T>::get(u_);
}
template<class T>
-T const* dynamic::getAddress() const {
+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) { return &d.nul; }
+ static void** get(Data& d) noexcept { return &d.nul; }
};
template<> struct dynamic::GetAddrImpl<dynamic::Array> {
- static Array* get(Data& d) { return &d.array; }
+ static Array* get(Data& d) noexcept { return &d.array; }
};
template<> struct dynamic::GetAddrImpl<bool> {
- static bool* get(Data& d) { return &d.boolean; }
+ static bool* get(Data& d) noexcept { return &d.boolean; }
};
template<> struct dynamic::GetAddrImpl<int64_t> {
- static int64_t* get(Data& d) { return &d.integer; }
+ static int64_t* get(Data& d) noexcept { return &d.integer; }
};
template<> struct dynamic::GetAddrImpl<double> {
- static double* get(Data& d) { return &d.doubl; }
+ static double* get(Data& d) noexcept { return &d.doubl; }
};
template<> struct dynamic::GetAddrImpl<fbstring> {
- static fbstring* get(Data& d) { return &d.string; }
+ static fbstring* get(Data& d) noexcept { return &d.string; }
};
template<> struct dynamic::GetAddrImpl<dynamic::ObjectImpl> {
static_assert(sizeof(ObjectImpl) <= sizeof(Data::objectBuffer),
" amount of space depending on its template parameters. This is "
"weird. Make objectBuffer bigger if you want to compile dynamic.");
- static ObjectImpl* get(Data& d) {
+ static ObjectImpl* get(Data& d) noexcept {
void* data = &d.objectBuffer;
return static_cast<ObjectImpl*>(data);
}
#undef FB_X
}
-inline void dynamic::destroy() {
+inline void dynamic::destroy() noexcept {
// This short-circuit speeds up some microbenchmarks.
if (type_ == NULLT) return;
const dynamic& val_;
};
-}
+template <class V>
+class FormatValue<detail::DefaultValueWrapper<dynamic, V>> {
+ public:
+ explicit FormatValue(
+ const detail::DefaultValueWrapper<dynamic, V>& val)
+ : val_(val) { }
+
+ template <class FormatCallback>
+ void format(FormatArg& arg, FormatCallback& cb) const {
+ auto& c = val_.container;
+ switch (c.type()) {
+ case dynamic::NULLT:
+ case dynamic::BOOL:
+ case dynamic::INT64:
+ case dynamic::STRING:
+ case dynamic::DOUBLE:
+ FormatValue<dynamic>(c).format(arg, cb);
+ break;
+ case dynamic::ARRAY:
+ {
+ int key = arg.splitIntKey();
+ if (key >= 0 && size_t(key) < c.size()) {
+ FormatValue<dynamic>(c.at(key)).format(arg, cb);
+ } else{
+ FormatValue<V>(val_.defaultValue).format(arg, cb);
+ }
+ }
+ break;
+ case dynamic::OBJECT:
+ {
+ auto pos = c.find(arg.splitKey());
+ if (pos != c.items().end()) {
+ FormatValue<dynamic>(pos->second).format(arg, cb);
+ } else {
+ FormatValue<V>(val_.defaultValue).format(arg, cb);
+ }
+ }
+ break;
+ }
+ }
+
+ private:
+ const detail::DefaultValueWrapper<dynamic, V>& val_;
+};
+
+} // namespaces
#undef FB_DYNAMIC_APPLY
projects / folly.git / blobdiff