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FunctionInvoke.hpp
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FunctionInvoke.hpp
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#include <iostream>
#include <vector>
#include <memory>
#include <string>
#include <utility>
#include <functional>
#include <Windows.h>
#include <type_traits>
#include <utility>
#include <typeinfo>
#include <string>
#include <cassert>
#include <unordered_map>
template<size_t N = 16>
class store {
char space[N];
template<typename T>
static constexpr bool
fits() { return sizeof(typename std::decay<T>::type) <= N; }
public:
template<typename D, typename V>
D *copy(V &&v) {
return fits<D>() ? new(space) D{ std::forward<V>(v) } :
new D{ std::forward<V>(v) };
}
template<typename D, typename V, typename B>
B *move(V &&v, B *&p) {
B *q = fits<D>() ? copy<D>(std::forward<V>(v)) : p;
p = nullptr;
return q;
}
template<typename D>
void free(D *p) { fits<D>() ? p->~D() : delete p; }
};
template<typename A = store<>>
class some : A {
using id = size_t;
template<typename T>
struct type { static void id() { } };
template<typename T>
static id type_id() { return reinterpret_cast<id>(&type<T>::id); }
template<typename T>
using decay = typename std::decay<T>::type;
template<typename T>
using none = typename std::enable_if<!std::is_same<some, T>::value>::type;
struct base {
virtual ~base() { }
virtual bool is(id) const = 0;
virtual base *copy(A&) const = 0;
virtual base *move(A&, base*&) = 0;
virtual void free(A&) = 0;
} *p = nullptr;
template<typename T>
struct data : base, std::tuple<T> {
using std::tuple<T>::tuple;
T &get() & { return std::get<0>(*this); }
T const &get() const& { return std::get<0>(*this); }
bool is(id i) const override { return i == type_id<T>(); }
base *copy(A &a) const override { return a.template copy<data>(get()); }
base *move(A &a, base *&p) override { return a.template move<data>(std::move(get()), p); }
void free(A &a) override { a.free(this); }
};
template<typename T>
T &stat() { return static_cast<data<T>*>(p)->get(); }
template<typename T>
T const &stat() const { return static_cast<data<T> const*>(p)->get(); }
template<typename T>
T &dyn() { return dynamic_cast<data<T>&>(*p).get(); }
template<typename T>
T const &dyn() const { return dynamic_cast<data<T> const&>(*p).get(); }
base *move(some &s) { return s.p->move(*this, s.p); }
base *copy(some const &s) { return s.p->copy(*this); }
base *read(some &&s) { return s.p ? move(s) : s.p; }
base *read(some const &s) { return s.p ? copy(s) : s.p; }
template<typename V, typename U = decay<V>, typename = none<U>>
base *read(V &&v) { return A::template copy<data<U>>(std::forward<V>(v)); }
template<typename X>
some &assign(X &&x) {
if (!p) p = read(std::forward<X>(x));
else {
some t{ std::move(*this) };
try { p = read(std::forward<X>(x)); }
catch (...) { p = move(t); throw; }
}
return *this;
}
void swap(some &s) {
if (!p) p = read(std::move(s));
else if (!s.p) s.p = move(*this);
else {
some t{ std::move(*this) };
try { p = move(s); }
catch (...) { p = move(t); throw; }
s.p = move(t);
}
}
public:
some() { }
~some() { if (p) p->free(*this); }
some(some &&s) : p{ read(std::move(s)) } { }
some(some const &s) : p{ read(s) } { }
template<typename V, typename = none<decay<V>>>
some(V &&v) : p{ read(std::forward<V>(v)) } { }
some &operator=(some &&s) { return assign(std::move(s)); }
some &operator=(some const &s) { return assign(s); }
template<typename V, typename = none<decay<V>>>
some &operator=(V &&v) { return assign(std::forward<V>(v)); }
friend void swap(some &s, some &r) { s.swap(r); }
void clear() { if (p) { p->free(*this); p = nullptr; } }
bool empty() const { return p; }
bool exist() {
if (p == nullptr) return false;
return true;
}
template<typename T>
bool is() const { return p ? p->is(type_id<T>()) : false; }
template<typename T> T &&_() && { return std::move(stat<T>()); }
template<typename T> T &_() & { return stat<T>(); }
template<typename T> T const &_() const& { return stat<T>(); }
template<typename T> T &&cast() && { return std::move(dyn<T>()); }
template<typename T> T &cast() & { return dyn<T>(); }
template<typename T> T const &cast() const& { return dyn<T>(); }
template<typename T> operator T && () && { return std::move(_<T>()); }
template<typename T> operator T &() & { return _<T>(); }
template<typename T> operator T const&() const& { return _<T>(); }
};
namespace std { using any = some<>; }
template<typename _Func>
struct fun_signature_t;
template<typename _Ret, typename ..._Args>
struct fun_signature_t<_Ret(*)(_Args...)> {
using type = std::function<void(_Args...)>;
};
template<typename _Class, typename _Ret, typename ..._Args>
struct fun_signature_t<_Ret(_Class::*)(_Args...)> {
using type = std::function<void(_Args...)>;
};
template<typename _Class, typename _Ret, typename ..._Args>
struct fun_signature_t<_Ret(_Class::*)(_Args...) const> {
using type = std::function<void(_Args...)>;
};
struct fun_signature {
template <typename _Obj, typename _Type = decltype(&_Obj::operator()) >
static auto get_signature(_Obj &, _Type = nullptr)->_Type;
template< typename _Obj, typename _Type = _Obj * >
static auto get_signature(_Obj * = {})->_Type;
};
class FunctionInvoke
{
public:
FunctionInvoke() = default;
~FunctionInvoke() = default;
template<typename _FObj, typename ..._Args>
void AddFunction(const std::string & name, const _FObj & fun) {
using f_type = decltype(fun_signature::get_signature(fun));
using func = typename fun_signature_t<f_type>::type;
std::cout << "\nf_type: " << typeid(f_type).name();
std::cout << "\nfunc: " << typeid(func).name();
_mapped_fun.emplace(name, func(fun));
}
template<typename ..._Args>
void Invoke(const std::string & method, _Args ... args) {
auto fun_any = _mapped_fun[method];
if (fun_any.exist()) {
using signature = std::function<void(_Args...)>;
std::cout << "\nsignature: " << typeid(signature).name();
auto func = fun_any._<signature>();
std::string type_name1 = typeid(signature).name();
std::string type_name2 = typeid(fun_any).name();
if (fun_any.is<signature>() || type_name1 == type_name2)
func(args...);
else
std::cout << "\nwrong sign: " << typeid(signature).name() << "\nexpected : " << typeid(fun_any).name() << std::endl;
}
}
private:
std::unordered_map< std::string, std::any > _mapped_fun;
};
namespace std { using function_invoke = FunctionInvoke; }