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bind.h
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bind.h
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/*
* Copyright 2012 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#pragma once
#if __cplusplus < 201103L
#error Including <emscripten/bind.h> requires building with -std=c++11 or newer!
#endif
#include <cassert>
#include <cstddef>
#include <functional>
#include <map>
#include <string>
#include <type_traits>
#include <vector>
#if __cplusplus >= 201703L
#include <optional>
#endif
#include <emscripten/em_macros.h>
#include <emscripten/val.h>
#include <emscripten/wire.h>
#if __has_feature(leak_sanitizer) || __has_feature(address_sanitizer)
#include <sanitizer/lsan_interface.h>
#endif
namespace emscripten {
enum class sharing_policy {
NONE = 0,
INTRUSIVE = 1,
BY_EMVAL = 2,
};
namespace internal {
typedef int GenericEnumValue;
typedef void* GenericFunction;
typedef void (*VoidFunctionPtr)(void);
// Implemented in JavaScript. Don't call these directly.
extern "C" {
void _embind_fatal_error(
const char* name,
const char* payload) __attribute__((__noreturn__));
void _embind_register_void(
TYPEID voidType,
const char* name);
void _embind_register_bool(
TYPEID boolType,
const char* name,
bool trueValue,
bool falseValue);
void _embind_register_integer(
TYPEID integerType,
const char* name,
size_t size,
int32_t minRange,
uint32_t maxRange);
void _embind_register_bigint(
TYPEID integerType,
const char* name,
size_t size,
int64_t minRange,
uint64_t maxRange);
void _embind_register_float(
TYPEID floatType,
const char* name,
size_t size);
void _embind_register_std_string(
TYPEID stringType,
const char* name);
void _embind_register_std_wstring(
TYPEID stringType,
size_t charSize,
const char* name);
void _embind_register_emval(
TYPEID emvalType);
void _embind_register_memory_view(
TYPEID memoryViewType,
unsigned typedArrayIndex,
const char* name);
void _embind_register_function(
const char* name,
unsigned argCount,
const TYPEID argTypes[],
const char* signature,
GenericFunction invoker,
GenericFunction function,
bool isAsync);
void _embind_register_value_array(
TYPEID tupleType,
const char* name,
const char* constructorSignature,
GenericFunction constructor,
const char* destructorSignature,
GenericFunction destructor);
void _embind_register_value_array_element(
TYPEID tupleType,
TYPEID getterReturnType,
const char* getterSignature,
GenericFunction getter,
void* getterContext,
TYPEID setterArgumentType,
const char* setterSignature,
GenericFunction setter,
void* setterContext);
void _embind_finalize_value_array(TYPEID tupleType);
void _embind_register_value_object(
TYPEID structType,
const char* fieldName,
const char* constructorSignature,
GenericFunction constructor,
const char* destructorSignature,
GenericFunction destructor);
void _embind_register_value_object_field(
TYPEID structType,
const char* fieldName,
TYPEID getterReturnType,
const char* getterSignature,
GenericFunction getter,
void* getterContext,
TYPEID setterArgumentType,
const char* setterSignature,
GenericFunction setter,
void* setterContext);
void _embind_finalize_value_object(TYPEID structType);
void _embind_register_class(
TYPEID classType,
TYPEID pointerType,
TYPEID constPointerType,
TYPEID baseClassType,
const char* getActualTypeSignature,
GenericFunction getActualType,
const char* upcastSignature,
GenericFunction upcast,
const char* downcastSignature,
GenericFunction downcast,
const char* className,
const char* destructorSignature,
GenericFunction destructor);
void _embind_register_class_constructor(
TYPEID classType,
unsigned argCount,
const TYPEID argTypes[],
const char* invokerSignature,
GenericFunction invoker,
GenericFunction constructor);
void _embind_register_class_function(
TYPEID classType,
const char* methodName,
unsigned argCount,
const TYPEID argTypes[],
const char* invokerSignature,
GenericFunction invoker,
void* context,
unsigned isPureVirtual,
bool isAsync);
void _embind_register_class_property(
TYPEID classType,
const char* fieldName,
TYPEID getterReturnType,
const char* getterSignature,
GenericFunction getter,
void* getterContext,
TYPEID setterArgumentType,
const char* setterSignature,
GenericFunction setter,
void* setterContext);
void _embind_register_class_class_function(
TYPEID classType,
const char* methodName,
unsigned argCount,
const TYPEID argTypes[],
const char* invokerSignature,
GenericFunction invoker,
GenericFunction method,
bool isAsync);
void _embind_register_class_class_property(
TYPEID classType,
const char* fieldName,
TYPEID fieldType,
const void* fieldContext,
const char* getterSignature,
GenericFunction getter,
const char* setterSignature,
GenericFunction setter);
EM_VAL _embind_create_inheriting_constructor(
const char* constructorName,
TYPEID wrapperType,
EM_VAL properties);
void _embind_register_enum(
TYPEID enumType,
const char* name,
size_t size,
bool isSigned);
void _embind_register_smart_ptr(
TYPEID pointerType,
TYPEID pointeeType,
const char* pointerName,
sharing_policy sharingPolicy,
const char* getPointeeSignature,
GenericFunction getPointee,
const char* constructorSignature,
GenericFunction constructor,
const char* shareSignature,
GenericFunction share,
const char* destructorSignature,
GenericFunction destructor);
void _embind_register_enum_value(
TYPEID enumType,
const char* valueName,
GenericEnumValue value);
void _embind_register_constant(
const char* name,
TYPEID constantType,
double value);
void _embind_register_optional(
TYPEID optionalType,
TYPEID type);
void _embind_register_user_type(
TYPEID type,
const char* typeName);
// Register an InitFunc in the global linked list of init functions.
void _embind_register_bindings(struct InitFunc* f);
// Binding initialization functions registered by EMSCRIPTEN_BINDINGS macro
// below. Stored as linked list of static data object avoiding std containers
// to avoid static constructor ordering issues.
struct InitFunc {
InitFunc(void (*init_func)()) : init_func(init_func) {
// This the function immediately upon constructions, and also register
// it so that it can be called again on each worker that starts.
init_func();
_embind_register_bindings(this);
}
void (*init_func)();
InitFunc* next = nullptr;
};
} // end extern "C"
} // end namespace internal
////////////////////////////////////////////////////////////////////////////////
// POLICIES
////////////////////////////////////////////////////////////////////////////////
template<int Index>
struct arg {
static constexpr int index = Index + 1;
};
struct ret_val {
static constexpr int index = 0;
};
/*
template<typename Slot>
struct allow_raw_pointer {
template<typename InputType, int Index>
struct Transform {
typedef typename std::conditional<
Index == Slot::index,
internal::AllowedRawPointer<typename std::remove_pointer<InputType>::type>,
InputType
>::type type;
};
};
*/
// allow all raw pointers
struct allow_raw_pointers {
template<typename InputType, int Index>
struct Transform {
typedef typename std::conditional<
std::is_pointer<InputType>::value,
internal::AllowedRawPointer<typename std::remove_pointer<InputType>::type>,
InputType
>::type type;
};
};
// this is temporary until arg policies are reworked
template<typename Slot>
struct allow_raw_pointer : public allow_raw_pointers {
};
struct async {
template<typename InputType, int Index>
struct Transform {
typedef InputType type;
};
};
struct pure_virtual {
template<typename InputType, int Index>
struct Transform {
typedef InputType type;
};
};
namespace return_value_policy {
struct take_ownership : public allow_raw_pointers {};
struct reference : public allow_raw_pointers {};
} // end namespace return_value_policy
namespace internal {
template<typename... Policies>
struct isPolicy;
template<typename... Rest>
struct isPolicy<return_value_policy::take_ownership, Rest...> {
static constexpr bool value = true;
};
template<typename... Rest>
struct isPolicy<return_value_policy::reference, Rest...> {
static constexpr bool value = true;
};
template<typename... Rest>
struct isPolicy<emscripten::async, Rest...> {
static constexpr bool value = true;
};
template <typename T, typename... Rest>
struct isPolicy<emscripten::allow_raw_pointer<T>, Rest...> {
static constexpr bool value = true;
};
template<typename... Rest>
struct isPolicy<allow_raw_pointers, Rest...> {
static constexpr bool value = true;
};
template<typename... Rest>
struct isPolicy<emscripten::pure_virtual, Rest...> {
static constexpr bool value = true;
};
template<typename T, typename... Rest>
struct isPolicy<T, Rest...> {
static constexpr bool value = isPolicy<Rest...>::value;
};
template<>
struct isPolicy<> {
static constexpr bool value = false;
};
template<typename ReturnType, typename... Rest>
struct GetReturnValuePolicy {
using tag = rvp::default_tag;
};
template<typename ReturnType, typename... Rest>
struct GetReturnValuePolicy<ReturnType, return_value_policy::take_ownership, Rest...> {
using tag = rvp::take_ownership;
};
template<typename ReturnType, typename... Rest>
struct GetReturnValuePolicy<ReturnType, return_value_policy::reference, Rest...> {
using tag = rvp::reference;
};
template<typename ReturnType, typename T, typename... Rest>
struct GetReturnValuePolicy<ReturnType, T, Rest...> {
using tag = GetReturnValuePolicy<ReturnType, Rest...>::tag;
};
template<typename... Policies>
struct isAsync;
template<typename... Rest>
struct isAsync<async, Rest...> {
static constexpr bool value = true;
};
template<typename T, typename... Rest>
struct isAsync<T, Rest...> {
static constexpr bool value = isAsync<Rest...>::value;
};
template<>
struct isAsync<> {
static constexpr bool value = false;
};
}
////////////////////////////////////////////////////////////////////////////////
// select_overload and select_const
////////////////////////////////////////////////////////////////////////////////
template<typename Signature>
Signature* select_overload(Signature* fn) {
return fn;
}
template<typename Signature, typename ClassType>
auto select_overload(Signature (ClassType::*fn)) -> decltype(fn) {
return fn;
}
template<typename ClassType, typename ReturnType, typename... Args>
auto select_const(ReturnType (ClassType::*method)(Args...) const) -> decltype(method) {
return method;
}
namespace internal {
// this should be in <type_traits>, but alas, it's not
template<typename T> struct remove_class;
template<typename C, typename R, typename... A>
struct remove_class<R(C::*)(A...)> { using type = R(A...); };
template<typename C, typename R, typename... A>
struct remove_class<R(C::*)(A...) const> { using type = R(A...); };
template<typename C, typename R, typename... A>
struct remove_class<R(C::*)(A...) volatile> { using type = R(A...); };
template<typename C, typename R, typename... A>
struct remove_class<R(C::*)(A...) const volatile> { using type = R(A...); };
template<typename LambdaType>
using LambdaSignature = typename remove_class<
decltype(&LambdaType::operator())
>::type;
} // end namespace internal
// requires captureless lambda because implicitly coerces to function pointer
template<typename LambdaType>
internal::LambdaSignature<LambdaType>* optional_override(const LambdaType& fp) {
return fp;
}
////////////////////////////////////////////////////////////////////////////////
// Invoker
////////////////////////////////////////////////////////////////////////////////
namespace internal {
template<typename ReturnPolicy, typename ReturnType, typename... Args>
struct Invoker {
static typename internal::BindingType<ReturnType>::WireType invoke(
ReturnType (*fn)(Args...),
typename internal::BindingType<Args>::WireType... args
) {
return internal::BindingType<ReturnType>::toWireType(
fn(internal::BindingType<Args>::fromWireType(args)...),
ReturnPolicy{}
);
}
};
template<typename ReturnPolicy, typename... Args>
struct Invoker<ReturnPolicy, void, Args...> {
static void invoke(
void (*fn)(Args...),
typename internal::BindingType<Args>::WireType... args
) {
return fn(
internal::BindingType<Args>::fromWireType(args)...
);
}
};
template<typename ReturnPolicy, typename FunctorType, typename ReturnType, typename... Args>
struct FunctorInvoker {
static typename internal::BindingType<ReturnType>::WireType invoke(
FunctorType& function,
typename internal::BindingType<Args>::WireType... args
) {
return internal::BindingType<ReturnType>::toWireType(
function(
internal::BindingType<Args>::fromWireType(args)...)
, ReturnPolicy{}
);
}
};
template<typename ReturnPolicy, typename FunctorType, typename... Args>
struct FunctorInvoker<ReturnPolicy, FunctorType, void, Args...> {
static void invoke(
FunctorType& function,
typename internal::BindingType<Args>::WireType... args
) {
function(
internal::BindingType<Args>::fromWireType(args)...);
}
};
} // end namespace internal
////////////////////////////////////////////////////////////////////////////////
// SignatureCode, SignatureString
////////////////////////////////////////////////////////////////////////////////
namespace internal {
template<typename T>
struct SignatureCode {};
template<>
struct SignatureCode<int> {
static constexpr char get() {
return 'i';
}
};
template<>
struct SignatureCode<void> {
static constexpr char get() {
return 'v';
}
};
template<>
struct SignatureCode<float> {
static constexpr char get() {
return 'f';
}
};
template<>
struct SignatureCode<double> {
static constexpr char get() {
return 'd';
}
};
template<>
struct SignatureCode<void*> {
static constexpr char get() {
return 'p';
}
};
template<>
struct SignatureCode<size_t> {
static constexpr char get() {
return 'p';
}
};
#ifdef __wasm64__
template<>
struct SignatureCode<long> {
static constexpr char get() {
return 'j';
}
};
#endif
template<typename... Args>
const char* getGenericSignature() {
static constexpr char signature[] = { SignatureCode<Args>::get()..., 0 };
return signature;
}
template<typename T> struct SignatureTranslator { using type = int; };
template<> struct SignatureTranslator<void> { using type = void; };
template<> struct SignatureTranslator<float> { using type = float; };
template<> struct SignatureTranslator<double> { using type = double; };
#ifdef __wasm64__
template<> struct SignatureTranslator<long> { using type = long; };
#endif
template<> struct SignatureTranslator<size_t> { using type = size_t; };
template<typename PtrType>
struct SignatureTranslator<PtrType*> { using type = void*; };
template<typename PtrType>
struct SignatureTranslator<PtrType&> { using type = void*; };
template<typename ReturnType, typename... Args>
struct SignatureTranslator<ReturnType (*)(Args...)> { using type = void*; };
template<typename... Args>
EMSCRIPTEN_ALWAYS_INLINE const char* getSpecificSignature() {
return getGenericSignature<typename SignatureTranslator<Args>::type...>();
}
template<typename Return, typename... Args>
EMSCRIPTEN_ALWAYS_INLINE const char* getSignature(Return (*)(Args...)) {
return getSpecificSignature<Return, Args...>();
}
} // end namespace internal
////////////////////////////////////////////////////////////////////////////////
// FUNCTIONS
////////////////////////////////////////////////////////////////////////////////
template<typename ReturnType, typename... Args, typename... Policies>
void function(const char* name, ReturnType (*fn)(Args...), Policies...) {
using namespace internal;
typename WithPolicies<Policies...>::template ArgTypeList<ReturnType, Args...> args;
using ReturnPolicy = GetReturnValuePolicy<ReturnType, Policies...>::tag;
auto invoke = Invoker<ReturnPolicy, ReturnType, Args...>::invoke;
_embind_register_function(
name,
args.getCount(),
args.getTypes(),
getSignature(invoke),
reinterpret_cast<GenericFunction>(invoke),
reinterpret_cast<GenericFunction>(fn),
isAsync<Policies...>::value);
}
namespace internal {
template<typename ClassType, typename... Args>
ClassType* operator_new(Args&&... args) {
return new ClassType(std::forward<Args>(args)...);
}
template<typename WrapperType, typename ClassType, typename... Args>
WrapperType wrapped_new(Args&&... args) {
return WrapperType(new ClassType(std::forward<Args>(args)...));
}
template<typename ClassType, typename... Args>
ClassType* raw_constructor(
typename internal::BindingType<Args>::WireType... args
) {
return new ClassType(
internal::BindingType<Args>::fromWireType(args)...
);
}
template<typename ClassType>
void raw_destructor(ClassType* ptr) {
delete ptr;
}
template<typename ReturnPolicy, typename FunctionPointerType, typename ReturnType, typename ThisType, typename... Args>
struct FunctionInvoker {
static typename internal::BindingType<ReturnType>::WireType invoke(
FunctionPointerType* function,
typename internal::BindingType<ThisType>::WireType wireThis,
typename internal::BindingType<Args>::WireType... args
) {
return internal::BindingType<ReturnType>::toWireType(
(*function)(
internal::BindingType<ThisType>::fromWireType(wireThis),
internal::BindingType<Args>::fromWireType(args)...),
ReturnPolicy{}
);
}
};
template<typename ReturnPolicy, typename FunctionPointerType, typename ThisType, typename... Args>
struct FunctionInvoker<ReturnPolicy, FunctionPointerType, void, ThisType, Args...> {
static void invoke(
FunctionPointerType* function,
typename internal::BindingType<ThisType>::WireType wireThis,
typename internal::BindingType<Args>::WireType... args
) {
(*function)(
internal::BindingType<ThisType>::fromWireType(wireThis),
internal::BindingType<Args>::fromWireType(args)...);
}
};
template<typename ReturnPolicy,
typename MemberPointer,
typename ReturnType,
typename ThisType,
typename... Args>
struct MethodInvoker {
static typename internal::BindingType<ReturnType>::WireType invoke(
const MemberPointer& method,
typename internal::BindingType<ThisType>::WireType wireThis,
typename internal::BindingType<Args>::WireType... args
) {
return internal::BindingType<ReturnType>::toWireType(
(internal::BindingType<ThisType>::fromWireType(wireThis)->*method)(
internal::BindingType<Args>::fromWireType(args)...
)
,
ReturnPolicy{}
);
}
};
template<typename ReturnPolicy,
typename MemberPointer,
typename ThisType,
typename... Args>
struct MethodInvoker<ReturnPolicy, MemberPointer, void, ThisType, Args...> {
static void invoke(
const MemberPointer& method,
typename internal::BindingType<ThisType>::WireType wireThis,
typename internal::BindingType<Args>::WireType... args
) {
return (internal::BindingType<ThisType>::fromWireType(wireThis)->*method)(
internal::BindingType<Args>::fromWireType(args)...
);
}
};
template<typename InstanceType, typename MemberType>
struct MemberAccess {
typedef MemberType InstanceType::*MemberPointer;
typedef internal::BindingType<MemberType> MemberBinding;
typedef typename MemberBinding::WireType WireType;
template<typename ClassType, typename ReturnPolicy = rvp::default_tag>
static WireType getWire(
const MemberPointer& field,
ClassType& ptr
) {
return MemberBinding::toWireType(ptr.*field, ReturnPolicy{});
}
template<typename ClassType>
static void setWire(
const MemberPointer& field,
ClassType& ptr,
WireType value
) {
ptr.*field = MemberBinding::fromWireType(value);
}
};
template<typename FieldType>
struct GlobalAccess {
typedef internal::BindingType<FieldType> MemberBinding;
typedef typename MemberBinding::WireType WireType;
static WireType get(FieldType* context) {
return MemberBinding::toWireType(*context, rvp::default_tag{});
}
static void set(FieldType* context, WireType value) {
*context = MemberBinding::fromWireType(value);
}
};
// TODO: This could do a reinterpret-cast if sizeof(T) === sizeof(void*)
template<typename T>
inline T* getContext(const T& t) {
// not a leak because this is called once per binding
auto* ret = new T(t);
#if __has_feature(leak_sanitizer) || __has_feature(address_sanitizer)
__lsan_ignore_object(ret);
#endif
return ret;
}
template<typename Accessor, typename ValueType>
struct PropertyTag {};
template<typename T>
struct GetterPolicy;
template<typename GetterReturnType, typename GetterThisType>
struct GetterPolicy<GetterReturnType (GetterThisType::*)() const> {
typedef GetterReturnType ReturnType;
typedef GetterReturnType (GetterThisType::*Context)() const;
typedef internal::BindingType<ReturnType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType, typename ReturnPolicy>
static WireType get(const Context& context, const ClassType& ptr) {
return Binding::toWireType((ptr.*context)(), ReturnPolicy{});
}
static void* getContext(Context context) {
return internal::getContext(context);
}
};
#ifdef __cpp_noexcept_function_type
template<typename GetterReturnType, typename GetterThisType>
struct GetterPolicy<GetterReturnType (GetterThisType::*)() const noexcept>
: GetterPolicy<GetterReturnType (GetterThisType::*)() const> {};
#endif
template<typename GetterReturnType, typename GetterThisType>
struct GetterPolicy<GetterReturnType (*)(const GetterThisType&)> {
typedef GetterReturnType ReturnType;
typedef GetterReturnType (*Context)(const GetterThisType&);
typedef internal::BindingType<ReturnType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType, typename ReturnPolicy>
static WireType get(const Context& context, const ClassType& ptr) {
return Binding::toWireType(context(ptr), ReturnPolicy{});
}
static void* getContext(Context context) {
return internal::getContext(context);
}
};
template<typename GetterReturnType, typename GetterThisType>
struct GetterPolicy<std::function<GetterReturnType(const GetterThisType&)>> {
typedef GetterReturnType ReturnType;
typedef std::function<GetterReturnType(const GetterThisType&)> Context;
typedef internal::BindingType<ReturnType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType, typename ReturnPolicy>
static WireType get(const Context& context, const ClassType& ptr) {
return Binding::toWireType(context(ptr), ReturnPolicy{});
}
static void* getContext(const Context& context) {
return internal::getContext(context);
}
};
template<typename Getter, typename GetterReturnType>
struct GetterPolicy<PropertyTag<Getter, GetterReturnType>> {
typedef GetterReturnType ReturnType;
typedef Getter Context;
typedef internal::BindingType<ReturnType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType, typename ReturnPolicy>
static WireType get(const Context& context, const ClassType& ptr) {
return Binding::toWireType(context(ptr), ReturnPolicy{});
}
static void* getContext(const Context& context) {
return internal::getContext(context);
}
};
template<typename T>
struct SetterPolicy;
template<typename SetterReturnType, typename SetterThisType, typename SetterArgumentType>
struct SetterPolicy<SetterReturnType (SetterThisType::*)(SetterArgumentType)> {
typedef SetterArgumentType ArgumentType;
typedef SetterReturnType (SetterThisType::*Context)(SetterArgumentType);
typedef internal::BindingType<SetterArgumentType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType>
static void set(const Context& context, ClassType& ptr, WireType wt) {
(ptr.*context)(Binding::fromWireType(wt));
}
static void* getContext(Context context) {
return internal::getContext(context);
}
};
#ifdef __cpp_noexcept_function_type
template<typename SetterReturnType, typename SetterThisType, typename SetterArgumentType>
struct SetterPolicy<SetterReturnType (SetterThisType::*)(SetterArgumentType) noexcept>
: SetterPolicy<SetterReturnType (SetterThisType::*)(SetterArgumentType)> {};
#endif
template<typename SetterReturnType, typename SetterThisType, typename SetterArgumentType>
struct SetterPolicy<SetterReturnType (*)(SetterThisType&, SetterArgumentType)> {
typedef SetterArgumentType ArgumentType;
typedef SetterReturnType (*Context)(SetterThisType&, SetterArgumentType);
typedef internal::BindingType<SetterArgumentType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType>
static void set(const Context& context, ClassType& ptr, WireType wt) {
context(ptr, Binding::fromWireType(wt));
}
static void* getContext(Context context) {
return internal::getContext(context);
}
};
template<typename SetterReturnType, typename SetterThisType, typename SetterArgumentType>
struct SetterPolicy<std::function<SetterReturnType(SetterThisType&, SetterArgumentType)>> {
typedef SetterArgumentType ArgumentType;
typedef std::function<SetterReturnType(SetterThisType&, SetterArgumentType)> Context;
typedef internal::BindingType<SetterArgumentType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType>
static void set(const Context& context, ClassType& ptr, WireType wt) {
context(ptr, Binding::fromWireType(wt));
}
static void* getContext(const Context& context) {
return internal::getContext(context);
}
};
template<typename Setter, typename SetterArgumentType>
struct SetterPolicy<PropertyTag<Setter, SetterArgumentType>> {
typedef SetterArgumentType ArgumentType;
typedef Setter Context;
typedef internal::BindingType<SetterArgumentType> Binding;
typedef typename Binding::WireType WireType;
template<typename ClassType>
static void set(const Context& context, ClassType& ptr, WireType wt) {
context(ptr, Binding::fromWireType(wt));
}
static void* getContext(const Context& context) {
return internal::getContext(context);
}
};
// Helper available in C++14.
template <bool _Test, class _T1, class _T2>
using conditional_t = typename std::conditional<_Test, _T1, _T2>::type;
// Conjunction is available in C++17
template<class...> struct conjunction : std::true_type {};
template<class B1> struct conjunction<B1> : B1 {};
template<class B1, class... Bn>
struct conjunction<B1, Bn...>
: conditional_t<bool(B1::value), conjunction<Bn...>, B1> {};
class noncopyable {
protected:
noncopyable() {}
~noncopyable() {}
private:
noncopyable(const noncopyable&) = delete;
const noncopyable& operator=(const noncopyable&) = delete;
};
template<typename ClassType, typename ElementType>
typename BindingType<ElementType>::WireType get_by_index(int index, ClassType& ptr) {
return BindingType<ElementType>::toWireType(ptr[index], rvp::default_tag{});
}
template<typename ClassType, typename ElementType>
void set_by_index(int index, ClassType& ptr, typename BindingType<ElementType>::WireType wt) {
ptr[index] = BindingType<ElementType>::fromWireType(wt);
}
} // end namespace internal
template<int Index>
struct index {
};
////////////////////////////////////////////////////////////////////////////////
// VALUE TUPLES
////////////////////////////////////////////////////////////////////////////////
template<typename ClassType>
class value_array : public internal::noncopyable {
public:
typedef ClassType class_type;
value_array(const char* name) {
using namespace internal;