lang/c/msgpack: added C++ binding

git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@50 5a5092ae-2292-43ba-b2d5-dcab9c1a2731

1 files changed, 760 insertions, 0 deletions

diff --git a/cpp/object.hpp b/cpp/object.hpp
new file mode 100644
index 0000000..c4e94d7
--- /dev/null
+++ b/cpp/object.hpp
@@ -0,0 +1,760 @@
+#ifndef MSGPACK_OBJECT_HPP__
+#define MSGPACK_OBJECT_HPP__
+#include <iostream>
+
+#include <cstddef>
+#include <stdexcept>
+#include <typeinfo>
+#include <ostream>
+#include <vector>
+#include <map>
+#include <string>
+
+namespace msgpack {
+
+
+class type_error      : public std::bad_cast { };
+class cast_error      : public type_error { };
+class overflow_error  : public type_error { };
+class underflow_error : public type_error { };
+class positive_overflow_error : public overflow_error { };
+class negative_overflow_error : public overflow_error { };
+
+
+struct raw {
+	explicit raw() : ptr(NULL), len(0) {}
+	explicit raw(void* p, size_t l) : ptr(p), len(l) {}
+public:
+	void* ptr;
+	size_t len;
+public:
+	std::string str() { return std::string((const char*)ptr, len); }
+};
+
+struct const_raw {
+	const_raw() : ptr(NULL), len(0) {}
+	const_raw(const void* p, size_t l) : ptr(p), len(l) {}
+public:
+	const void* ptr;
+	size_t len;
+public:
+	std::string str() { return std::string((const char*)ptr, len); }
+};
+
+
+struct object;
+
+typedef std::map<object, object> map;
+typedef std::vector<object> array;
+
+
+template <typename T, typename X, bool TSigned, bool XSigned>
+struct numeric_overflow_signed_impl;
+
+template <typename T, typename X>
+struct numeric_overflow_signed_impl<T, X, true, true> {
+	static int test(X x) {
+		if(		( std::numeric_limits<T>::is_integer &&  std::numeric_limits<X>::is_integer) ||
+				(!std::numeric_limits<T>::is_integer && !std::numeric_limits<X>::is_integer) ) {
+			if( sizeof(T) < sizeof(X) ) {
+				if( static_cast<X>( std::numeric_limits<T>::max()) < x ) { return 1; }
+				if( static_cast<X>(-std::numeric_limits<T>::max()) > x ) { return -1; }
+			}
+		} else if(std::numeric_limits<T>::is_integer) {
+			if( static_cast<X>( std::numeric_limits<T>::max()) < x) { return 1; }
+			if( static_cast<X>(-std::numeric_limits<T>::max()) > x) { return -1; }
+		}
+		return 0;
+	}
+};
+
+template <typename T, typename X>
+struct numeric_overflow_signed_impl<T, X, true, false> {
+	static int test(X x) {
+		if(		( std::numeric_limits<T>::is_integer &&  std::numeric_limits<X>::is_integer) ||
+				(!std::numeric_limits<T>::is_integer && !std::numeric_limits<X>::is_integer) ) {
+			if( sizeof(T) <= sizeof(X) ) {
+				if( static_cast<X>(std::numeric_limits<T>::max()) < x ) { return 1; }
+			}
+		} else if(std::numeric_limits<T>::is_integer) {
+			if( static_cast<X>( std::numeric_limits<T>::max()) < x) { return 1; }
+		}
+		return 0;
+	}
+};
+
+template <typename T, typename X>
+struct numeric_overflow_signed_impl<T, X, false, true> {
+	static int test(X x) {
+		if( static_cast<X>(0) > x ) { return -1; }
+		if(		( std::numeric_limits<T>::is_integer &&  std::numeric_limits<X>::is_integer) ||
+				(!std::numeric_limits<T>::is_integer && !std::numeric_limits<X>::is_integer) ) {
+			if( sizeof(T) < sizeof(X) ) {
+				if( static_cast<X>(std::numeric_limits<T>::max()) < x ) { return 1; }
+			}
+		} else if(std::numeric_limits<T>::is_integer) {
+			if( static_cast<X>( std::numeric_limits<T>::max()) < x) { return 1; }
+		}
+		return 0;
+	}
+};
+
+template <typename T, typename X>
+struct numeric_overflow_signed_impl<T, X, false, false> {
+	static int test(X x) {
+		if(		( std::numeric_limits<T>::is_integer &&  std::numeric_limits<X>::is_integer) ||
+				(!std::numeric_limits<T>::is_integer && !std::numeric_limits<X>::is_integer) ) {
+			if( sizeof(T) < sizeof(X) ) {
+				if( static_cast<X>(std::numeric_limits<T>::max()) < x ) { return 1; }
+			}
+		} else if(std::numeric_limits<T>::is_integer) {
+			if( static_cast<X>(std::numeric_limits<T>::max()) < x ) { return 1; }
+		}
+		return 0;
+	}
+};
+
+template <typename T, typename X>
+struct numeric_overflow {
+	static int test(X x) {
+		return numeric_overflow_signed_impl<T, X, std::numeric_limits<T>::is_signed, std::numeric_limits<X>::is_signed>::test(x);
+	}
+	static void check(X x) {
+		int r = test(x);
+		if(r ==  1) { throw positive_overflow_error(); }
+		if(r == -1) { throw negative_overflow_error(); }
+	}
+};
+
+
+template <typename T, typename X>
+struct numeric_underflow {
+	static bool test(X x) {
+		return static_cast<X>(static_cast<T>(x)) != x;
+	}
+	static void check(X x) {
+		if(test(x)) { throw underflow_error(); }
+	}
+};
+
+
+struct object_class {
+	virtual ~object_class() {}
+	virtual     bool   isnil() const { return false; }
+	virtual     bool   xbool() const { throw cast_error(); }
+	virtual  uint8_t     xu8() const { throw cast_error(); }
+	virtual uint16_t    xu16() const { throw cast_error(); }
+	virtual uint32_t    xu32() const { throw cast_error(); }
+	virtual uint64_t    xu64() const { throw cast_error(); }
+	virtual   int8_t     xi8() const { throw cast_error(); }
+	virtual  int16_t    xi16() const { throw cast_error(); }
+	virtual  int32_t    xi32() const { throw cast_error(); }
+	virtual  int64_t    xi64() const { throw cast_error(); }
+	virtual    float  xfloat() const { throw cast_error(); }
+	virtual   double xdouble() const { throw cast_error(); }
+	virtual      raw    xraw() { throw cast_error(); }
+	virtual   array&  xarray() { throw cast_error(); }
+	virtual     map&    xmap() { throw cast_error(); }
+	virtual    const_raw   xraw() const { throw cast_error(); }
+	virtual const array& xarray() const { throw cast_error(); }
+	virtual const   map&   xmap() const { throw cast_error(); }
+	virtual bool operator== (const object_class* x) const { return false; }
+	bool operator!= (const object_class* x) const { return !(this->operator==(x)); }
+	virtual bool operator<  (const object_class* x) const { throw cast_error(); }
+	virtual bool operator>  (const object_class* x) const { throw cast_error(); }
+	operator     bool() const { return   xbool(); } // FIXME !isnil();
+	operator  uint8_t() const { return     xu8(); }
+	operator uint16_t() const { return    xu16(); }
+	operator uint32_t() const { return    xu32(); }
+	operator uint64_t() const { return    xu64(); }
+	operator   int8_t() const { return     xi8(); }
+	operator  int16_t() const { return    xi16(); }
+	operator  int32_t() const { return    xi32(); }
+	operator  int64_t() const { return    xi64(); }
+	operator    float() const { return  xfloat(); }
+	operator   double() const { return xdouble(); }
+	operator    raw() { return   xraw(); }
+	operator array&() { return xarray(); }
+	operator   map&() { return   xmap(); }
+	operator    const_raw() const { return   xraw(); }
+	operator const array&() const { return xarray(); }
+	operator const   map&() const { return   xmap(); }
+	virtual const object_class* inspect(std::ostream& s) const
+		{ s << '<' << typeid(*this).name() << '>'; return this; }
+protected:
+	template <typename T, typename X>
+	static void check_overflow(X x) { numeric_overflow<T, X>::check(x); }
+	template <typename T, typename X>
+	static void check_underflow(X x) { numeric_underflow<T, X>::check(x); }
+};
+
+inline std::ostream& operator<< (std::ostream& s, const object_class* o)
+	{ o->inspect(s); return s; }
+
+
+struct object_container_mixin {};
+struct object_constructor_mixin {};
+
+
+struct object {
+	explicit object() : val(NULL) {}
+	object(object_class* v) : val(v) {}
+	//object(object_class& v) : val(&v) {}
+	~object() {}
+	    bool   isnil() const { return val->isnil();   }
+	    bool   xbool() const { return val->xbool();   }
+	 uint8_t     xu8() const { return val->xu8();     }
+	uint16_t    xu16() const { return val->xu16();    }
+	uint32_t    xu32() const { return val->xu32();    }
+	uint64_t    xu64() const { return val->xu64();    }
+	  int8_t     xi8() const { return val->xi8();     }
+	 int16_t    xi16() const { return val->xi16();    }
+	 int32_t    xi32() const { return val->xi32();    }
+	 int64_t    xi64() const { return val->xi64();    }
+	   float  xfloat() const { return val->xfloat();  }
+	  double xdouble() const { return val->xdouble(); }
+	     raw    xraw() { return val->xraw();   }
+	  array&  xarray() { return val->xarray(); }
+	    map&    xmap() { return val->xmap();   }
+	   const_raw   xraw() const { return const_cast<const object_class*>(val)->xraw();   }
+	const array& xarray() const { return const_cast<const object_class*>(val)->xarray(); }
+	const   map&   xmap() const { return const_cast<const object_class*>(val)->xmap();   }
+	bool operator== (object x) const { return val->operator== (x.val); }
+	bool operator!= (object x) const { return val->operator!= (x.val); }
+	bool operator<  (object x) const { return val->operator<  (x.val); }
+	bool operator>  (object x) const { return val->operator>  (x.val); }
+	operator     bool() const { return val->operator bool();     }
+	operator  uint8_t() const { return val->operator uint8_t();  }
+	operator uint16_t() const { return val->operator uint16_t(); }
+	operator uint32_t() const { return val->operator uint32_t(); }
+	operator uint64_t() const { return val->operator uint64_t(); }
+	operator   int8_t() const { return val->operator int8_t();   }
+	operator  int16_t() const { return val->operator int16_t();  }
+	operator  int32_t() const { return val->operator int32_t();  }
+	operator  int64_t() const { return val->operator int64_t();  }
+	operator    float() const { return val->operator float();    }
+	operator   double() const { return val->operator double();   }
+	operator    raw() { return val->operator raw();    }
+	operator array&() { return val->operator array&(); }
+	operator   map&() { return val->operator map&();   }
+	operator    raw() const { return val->operator raw();    }
+	operator array&() const { return val->operator array&(); }
+	operator   map&() const { return val->operator map&();   }
+	const object& inspect(std::ostream& s) const
+		{ val->inspect(s); return *this; }
+private:
+	friend class object_container_mixin;
+	friend class object_constructor_mixin;
+	object_class* val;
+};
+
+inline std::ostream& operator<< (std::ostream& s, const object& o)
+	{ o.inspect(s); return s; }
+
+
+struct object_nil : object_class {
+	bool isnil() const { return true; }
+	bool operator== (const object_class* x) const { return typeid(*this) == typeid(*x); }
+	const object_class* inspect(std::ostream& s) const
+		{ s << "nil"; return this; }
+};
+
+struct object_true : object_class {
+	bool xbool() const { return true; }
+	bool operator== (const object_class* x) const { return typeid(*this) == typeid(*x); }
+	const object_class* inspect(std::ostream& s) const
+		{ s << "true"; return this; }
+};
+
+struct object_false : object_class {
+	bool xbool() const { return false; }
+	bool operator== (const object_class* x) const { return typeid(*this) == typeid(*x); }
+	const object_class* inspect(std::ostream& s) const
+		{ s << "false"; return this; }
+};
+
+struct object_u8 : object_class {
+	explicit object_u8(uint8_t v) : val(v) {}
+	 uint8_t  xu8() const { return val; }
+	uint16_t xu16() const { return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { return static_cast<int16_t>(val); }
+	 int32_t xi32() const { return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xu8(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xu8(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xu8(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << (uint16_t)val; return this; }
+private:
+	uint8_t val;
+};
+
+struct object_u16 : object_class {
+	explicit object_u16(uint16_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint16_t xu16() const { return val; }
+	uint32_t xu32() const { return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { check_overflow<int16_t>(val);
+							return static_cast<int16_t>(val); }
+	 int32_t xi32() const { return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xu16(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xu16(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (type_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xu16(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (type_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	uint16_t val;
+};
+
+struct object_u32 : object_class {
+	explicit object_u32(uint32_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { return val; }
+	uint64_t xu64() const { return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { check_overflow<int16_t>(val);
+							return static_cast<int16_t>(val); }
+	 int32_t xi32() const { check_overflow<int32_t>(val);
+							return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { check_underflow<float>(val);
+							return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xu32(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xu32(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xu32(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	uint32_t val;
+};
+
+struct object_u64 : object_class {
+	explicit object_u64(uint64_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { check_overflow<uint32_t>(val);
+							return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { return val; }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { check_overflow<int16_t>(val);
+							return static_cast<int16_t>(val); }
+	 int32_t xi32() const { check_overflow<int32_t>(val);
+							return static_cast<int32_t>(val); }
+	 int64_t xi64() const { check_overflow<int64_t>(val);
+							return static_cast<int64_t>(val); }
+	 float  xfloat() const { check_underflow<float>(val);
+							return static_cast<float>(val); }
+	double xdouble() const { check_underflow<double>(val);
+							 return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xu64(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xu64(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xu64(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	uint64_t val;
+};
+
+struct object_i8 : object_class {
+	explicit object_i8(int8_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { check_overflow<uint32_t>(val);
+							return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { check_overflow<uint64_t>(val);
+							return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { return val; }
+	 int16_t xi16() const { return static_cast<int16_t>(val); }
+	 int32_t xi32() const { return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xi8(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xi8(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xi8(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << (int16_t)val; return this; }
+private:
+	int8_t val;
+};
+
+struct object_i16 : object_class {
+	explicit object_i16(int16_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { check_overflow<uint32_t>(val);
+							return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { check_overflow<uint64_t>(val);
+							return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { return val; }
+	 int32_t xi32() const { return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xi16(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xi16(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (type_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xi16(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (type_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	int16_t val;
+};
+
+struct object_i32 : object_class {
+	explicit object_i32(int32_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { check_overflow<uint32_t>(val);
+							return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { check_overflow<uint64_t>(val);
+							return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { check_overflow<int16_t>(val);
+							return static_cast<int16_t>(val); }
+	 int32_t xi32() const { return val; }
+	 int64_t xi64() const { return static_cast<int64_t>(val); }
+	 float  xfloat() const { check_underflow<float>(val);
+							return static_cast<float>(val); }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xi32(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xi32(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xi32(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	int32_t val;
+};
+
+struct object_i64 : object_class {
+	explicit object_i64(int64_t v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val);  }
+	uint16_t xu16() const { check_overflow<uint16_t>(val);
+							return static_cast<uint16_t>(val); }
+	uint32_t xu32() const { check_overflow<uint32_t>(val);
+							return static_cast<uint32_t>(val); }
+	uint64_t xu64() const { check_overflow<uint64_t>(val);
+							return static_cast<uint64_t>(val); }
+	  int8_t  xi8() const { check_overflow<int8_t>(val);
+							return static_cast<int8_t>(val);  }
+	 int16_t xi16() const { check_overflow<int16_t>(val);
+							return static_cast<int16_t>(val); }
+	 int32_t xi32() const { check_overflow<int32_t>(val);
+							return static_cast<int32_t>(val); }
+	 int64_t xi64() const { return val; }
+	 float  xfloat() const { check_underflow<float>(val);
+							return static_cast<float>(val); }
+	double xdouble() const { check_underflow<double>(val);
+							 return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xi64(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xi64(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	bool operator>  (const object_class* x) const { try { return val > x->xi64(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; } }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	int64_t val;
+};
+
+
+struct object_float : object_class {
+	object_float(float v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint16_t xu16() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint32_t xu32() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint64_t xu64() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	  int8_t  xi8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int16_t xi16() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int32_t xi32() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int64_t xi64() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 float  xfloat() const { return val; }
+	double xdouble() const { return static_cast<double>(val); }
+	bool operator== (const object_class* x) const { try { return val == x->xfloat(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return static_cast<double>(val) < x->xdouble(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; }
+										catch (underflow_error&) {
+											if(val < 0.0) {
+												if(numeric_overflow<int64_t, float>::test(val) == -1) { return true; }
+												try { return static_cast<int64_t>(val) < x->xi64(); }
+												catch (type_error&) { return true; }
+											} else {
+												if(numeric_overflow<uint64_t, float>::test(val) == 1) { return false; }
+												try { return static_cast<uint64_t>(val) < x->xu64(); }
+												catch (type_error&) { return false; }
+											}
+										} }
+	bool operator>  (const object_class* x) const { try { return static_cast<double>(val) > x->xdouble(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; }
+										catch (underflow_error&) {
+											if(val < 0.0) {
+												if(numeric_overflow<int64_t, float>::test(val) == -1) { return false; }
+												try { return static_cast<int64_t>(val) > x->xi64(); }
+												catch (type_error&) { return false; }
+											} else {
+												if(numeric_overflow<uint64_t, float>::test(val) == 1) { return true; }
+												try { return static_cast<uint64_t>(val) > x->xu64(); }
+												catch (type_error&) { return true; }
+											}
+										} }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	float val;
+};
+
+
+struct object_double : object_class {
+	object_double(double v) : val(v) {}
+	 uint8_t  xu8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint16_t xu16() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint32_t xu32() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	uint64_t xu64() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	  int8_t  xi8() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int16_t xi16() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int32_t xi32() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 int64_t xi64() const { check_overflow<uint8_t>(val);
+							return static_cast<uint8_t>(val); }
+	 float  xfloat() const { check_overflow<float>(val);
+							check_underflow<float>(val);
+							return static_cast<float>(val); }
+	double xdouble() const { return val; }
+	bool operator== (const object_class* x) const { try { return val == x->xdouble(); }
+										catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { try { return val < x->xdouble(); }
+										catch (positive_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; }
+										catch (underflow_error&) {
+											if(val < 0.0) {
+												if(numeric_overflow<int64_t, double>::test(val) == -1) { return true; }
+												try { return static_cast<int64_t>(val) < x->xi64(); }
+												catch (type_error&) { return true; }
+											} else {
+												if(numeric_overflow<uint64_t, double>::test(val) == 1) { return false; }
+												try { return static_cast<uint64_t>(val) < x->xu64(); }
+												catch (type_error&) { return false; }
+											}
+										} }
+	bool operator>  (const object_class* x) const { try { return val > x->xdouble(); }
+										catch (negative_overflow_error&) { return true; }
+										catch (overflow_error&) { return false; }
+										catch (underflow_error&) {
+											if(val < 0.0) {
+												if(numeric_overflow<int64_t, double>::test(val) == -1) { return false; }
+												try { return static_cast<int64_t>(val) > x->xi64(); }
+												catch (type_error&) { return false; }
+											} else {
+												if(numeric_overflow<uint64_t, double>::test(val) == 1) { return true; }
+												try { return static_cast<uint64_t>(val) > x->xu64(); }
+												catch (type_error&) { return true; }
+											}
+										} }
+	const object_class* inspect(std::ostream& s) const
+		{ s << val; return this; }
+private:
+	double val;
+};
+
+
+struct object_raw : object_class {
+	explicit object_raw(void* p, uint32_t l) : ptr(p), len(l) {}
+	raw xraw() { return raw(ptr, len); }
+	const_raw xraw() const { return const_raw(ptr, len); }
+	bool operator== (const object_class* x) const { try { const_raw xr(x->xraw());
+		return len == xr.len && (ptr == xr.ptr || memcmp(ptr, xr.ptr, len) == 0); }
+		catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { const_raw xr(x->xraw());
+		if(len == xr.len) { return ptr != xr.ptr && memcmp(ptr, xr.ptr, len) < 0; }
+		else { return len < xr.len; } }
+	bool operator>  (const object_class* x) const { const_raw xr(x->xraw());
+		if(len == xr.len) { return ptr != xr.ptr && memcmp(ptr, xr.ptr, len) > 0; }
+		else { return len > xr.len; } }
+	const object_class* inspect(std::ostream& s) const
+		{ (s << '"').write((const char*)ptr, len) << '"'; return this; }  // FIXME escape
+private:
+	void* ptr;
+	uint32_t len;
+};
+
+struct object_const_raw : object_class {
+	explicit object_const_raw(const void* p, uint32_t l) : ptr(p), len(l) {}
+	const_raw xraw() const { return const_raw(ptr, len); }
+	bool operator== (const object_class* x) const { try { const_raw xr(x->xraw());
+		return len == xr.len && (ptr == xr.ptr || memcmp(ptr, xr.ptr, len) == 0); }
+		catch (type_error&) { return false; } }
+	bool operator<  (const object_class* x) const { const_raw xr(x->xraw());
+		if(len == xr.len) { return ptr != xr.ptr && memcmp(ptr, xr.ptr, len) < 0; }
+		else { return len < xr.len; } }
+	bool operator>  (const object_class* x) const { const_raw xr(x->xraw());
+		if(len == xr.len) { return ptr != xr.ptr && memcmp(ptr, xr.ptr, len) > 0; }
+		else { return len > xr.len; } }
+	const object_class* inspect(std::ostream& s) const
+		{ (s << '"').write((const char*)ptr, len) << '"'; return this; }  // FIXME escape
+private:
+	const void* ptr;
+	uint32_t len;
+};
+
+struct object_array : object_class, object_container_mixin {
+	explicit object_array() {}
+	explicit object_array(uint32_t n) { val.reserve(n); }
+	array& xarray() { return val; }
+	const array& xarray() const { return val; }
+	bool operator== (const object_class* x) const { try {
+		const std::vector<object>& xa(x->xarray());
+		if(val.size() != xa.size()) { return false; }
+		for(std::vector<object>::const_iterator iv(val.begin()), iv_end(val.end()), ix(xa.begin());
+				iv != iv_end;
+				++iv, ++ix) {
+			if(*iv != *ix) { return false; }
+		}
+		return true;
+		} catch (type_error&) { return false; } }
+	// FIXME operator< operator>
+	const object_class* inspect(std::ostream& s) const {
+		s << '[';
+		if(!val.empty()) {
+			std::vector<object>::const_iterator it(val.begin());
+			s << *it;
+			++it;
+			for(std::vector<object>::const_iterator it_end(val.end());
+					it != it_end;
+					++it) {
+				s << ", " << *it;
+			}
+		}
+		s << ']';
+		return this; }
+public:
+	void push_back(object o) { val.push_back(o); }
+private:
+	std::vector<object> val;
+};
+
+// FIXME hash, operator==: nil, true, false, containerを入れられない
+struct object_map : object_class, object_container_mixin {
+	explicit object_map() {}
+	map& xmap() { return val; }
+	const map& xmap() const { return val; }
+	bool operator== (const object_class* x) const { try {
+		const std::map<object, object>& xm(x->xmap());
+		if(val.size() != xm.size()) { return false; }
+		for(std::map<object, object>::const_iterator iv(val.begin()), iv_end(val.end()), ix(xm.begin());
+				iv != iv_end;
+				++iv, ++ix) {
+			if(iv->first != ix->first || iv->second != ix->first) { return false; }
+		}
+		return true;
+		} catch (type_error&) { return false; } }
+	// FIXME operator< operator>
+	const object_class* inspect(std::ostream& s) const {
+		s << '{';
+		if(!val.empty()) {
+			std::map<object, object>::const_iterator it(val.begin());
+			s << it->first << "=>" << it->second;
+			++it;
+			for(std::map<object, object>::const_iterator it_end(val.end());
+					it != it_end;
+					++it) {
+				s << ", " << it->first << "=>" << it->second;
+			}
+		}
+		s << '}';
+		return this; }
+public:
+	void store(object k, object v) { val[k] = v; }
+private:
+	std::map<object, object> val;
+};
+
+
+}  // namespace msgpack
+
+#endif /* msgpack/object.hpp */
+