00001 #ifndef PROTON_SCALAR_BASE_HPP
00002 #define PROTON_SCALAR_BASE_HPP
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00025 #include "./binary.hpp"
00026 #include "./decimal.hpp"
00027 #include "./error.hpp"
00028 #include "./internal/comparable.hpp"
00029 #include "./internal/export.hpp"
00030 #include "./internal/type_traits.hpp"
00031 #include "./symbol.hpp"
00032 #include "./timestamp.hpp"
00033 #include "./type_id.hpp"
00034 #include "./types_fwd.hpp"
00035 #include "./uuid.hpp"
00036
00037 #include <proton/type_compat.h>
00038
00039 #include <iosfwd>
00040 #include <string>
00041 #include <typeinfo>
00042
00045
00046 namespace proton {
00047
00048 class scalar_base;
00049
00050 namespace codec {
00051 class decoder;
00052 class encoder;
00053 }
00054
00055 namespace internal {
00056 template<class T> T get(const scalar_base& s);
00057 }
00058
00060 class scalar_base : private internal::comparable<scalar_base> {
00061 public:
00063 PN_CPP_EXTERN type_id type() const;
00064
00066 PN_CPP_EXTERN bool empty() const;
00067
00069 friend PN_CPP_EXTERN bool operator<(const scalar_base& x, const scalar_base& y);
00071 friend PN_CPP_EXTERN bool operator==(const scalar_base& x, const scalar_base& y);
00073 friend PN_CPP_EXTERN std::ostream& operator<<(std::ostream& o, const scalar_base& x);
00074
00075 protected:
00076 PN_CPP_EXTERN scalar_base(const pn_atom_t& a);
00077 PN_CPP_EXTERN scalar_base();
00078 PN_CPP_EXTERN scalar_base(const scalar_base&);
00079 PN_CPP_EXTERN scalar_base& operator=(const scalar_base&);
00080
00081 PN_CPP_EXTERN void put_(bool);
00082 PN_CPP_EXTERN void put_(uint8_t);
00083 PN_CPP_EXTERN void put_(int8_t);
00084 PN_CPP_EXTERN void put_(uint16_t);
00085 PN_CPP_EXTERN void put_(int16_t);
00086 PN_CPP_EXTERN void put_(uint32_t);
00087 PN_CPP_EXTERN void put_(int32_t);
00088 PN_CPP_EXTERN void put_(uint64_t);
00089 PN_CPP_EXTERN void put_(int64_t);
00090 PN_CPP_EXTERN void put_(wchar_t);
00091 PN_CPP_EXTERN void put_(float);
00092 PN_CPP_EXTERN void put_(double);
00093 PN_CPP_EXTERN void put_(timestamp);
00094 PN_CPP_EXTERN void put_(const decimal32&);
00095 PN_CPP_EXTERN void put_(const decimal64&);
00096 PN_CPP_EXTERN void put_(const decimal128&);
00097 PN_CPP_EXTERN void put_(const uuid&);
00098 PN_CPP_EXTERN void put_(const std::string&);
00099 PN_CPP_EXTERN void put_(const symbol&);
00100 PN_CPP_EXTERN void put_(const binary&);
00101 PN_CPP_EXTERN void put_(const char* s);
00102 PN_CPP_EXTERN void put_(const null&);
00103 #if PN_CPP_HAS_NULLPTR
00104 PN_CPP_EXTERN void put_(decltype(nullptr));
00105 #endif
00106
00107 template<class T> void put(const T& x) { putter<T>::put(*this, x); }
00108
00109 private:
00110 PN_CPP_EXTERN void get_(bool&) const;
00111 PN_CPP_EXTERN void get_(uint8_t&) const;
00112 PN_CPP_EXTERN void get_(int8_t&) const;
00113 PN_CPP_EXTERN void get_(uint16_t&) const;
00114 PN_CPP_EXTERN void get_(int16_t&) const;
00115 PN_CPP_EXTERN void get_(uint32_t&) const;
00116 PN_CPP_EXTERN void get_(int32_t&) const;
00117 PN_CPP_EXTERN void get_(uint64_t&) const;
00118 PN_CPP_EXTERN void get_(int64_t&) const;
00119 PN_CPP_EXTERN void get_(wchar_t&) const;
00120 PN_CPP_EXTERN void get_(float&) const;
00121 PN_CPP_EXTERN void get_(double&) const;
00122 PN_CPP_EXTERN void get_(timestamp&) const;
00123 PN_CPP_EXTERN void get_(decimal32&) const;
00124 PN_CPP_EXTERN void get_(decimal64&) const;
00125 PN_CPP_EXTERN void get_(decimal128&) const;
00126 PN_CPP_EXTERN void get_(uuid&) const;
00127 PN_CPP_EXTERN void get_(std::string&) const;
00128 PN_CPP_EXTERN void get_(symbol&) const;
00129 PN_CPP_EXTERN void get_(binary&) const;
00130 PN_CPP_EXTERN void get_(null&) const;
00131 #if PN_CPP_HAS_NULLPTR
00132 PN_CPP_EXTERN void get_(decltype(nullptr)&) const;
00133 #endif
00134
00135
00136
00137 template <class T, class Enable=void> struct putter {
00138 static void put(scalar_base& s, const T& x) { s.put_(x); }
00139 };
00140 template <class T>
00141 struct putter<T, typename internal::enable_if<internal::is_unknown_integer<T>::value>::type> {
00142 static void put(scalar_base& s, const T& x) {
00143 s.put_(static_cast<typename internal::known_integer<T>::type>(x));
00144 }
00145 };
00146 template <class T, class Enable=void>
00147 struct getter {
00148 static T get(const scalar_base& s) { T x; s.get_(x); return x; }
00149 };
00150 template <class T>
00151 struct getter<T, typename internal::enable_if<internal::is_unknown_integer<T>::value>::type> {
00152 static T get(const scalar_base& s) {
00153 typename internal::known_integer<T>::type x; s.get_(x); return x;
00154 }
00155 };
00156
00157 void ok(pn_type_t) const;
00158 void set(const pn_atom_t&);
00159 void set(const binary& x, pn_type_t t);
00160
00161 pn_atom_t atom_;
00162 binary bytes_;
00163
00165 friend class message;
00166 friend class codec::encoder;
00167 friend class codec::decoder;
00168 template<class T> friend T internal::get(const scalar_base& s);
00170 };
00171
00172 namespace internal {
00173
00174 template<class T> T get(const scalar_base& s) {
00175 return scalar_base::getter<T>::get(s);
00176 }
00177
00178 template <class R, class F> R visit(const scalar_base& s, F f) {
00179 switch(s.type()) {
00180 case BOOLEAN: return f(internal::get<bool>(s));
00181 case UBYTE: return f(internal::get<uint8_t>(s));
00182 case BYTE: return f(internal::get<int8_t>(s));
00183 case USHORT: return f(internal::get<uint16_t>(s));
00184 case SHORT: return f(internal::get<int16_t>(s));
00185 case UINT: return f(internal::get<uint32_t>(s));
00186 case INT: return f(internal::get<int32_t>(s));
00187 case CHAR: return f(internal::get<wchar_t>(s));
00188 case ULONG: return f(internal::get<uint64_t>(s));
00189 case LONG: return f(internal::get<int64_t>(s));
00190 case TIMESTAMP: return f(internal::get<timestamp>(s));
00191 case FLOAT: return f(internal::get<float>(s));
00192 case DOUBLE: return f(internal::get<double>(s));
00193 case DECIMAL32: return f(internal::get<decimal32>(s));
00194 case DECIMAL64: return f(internal::get<decimal64>(s));
00195 case DECIMAL128: return f(internal::get<decimal128>(s));
00196 case UUID: return f(internal::get<uuid>(s));
00197 case BINARY: return f(internal::get<binary>(s));
00198 case STRING: return f(internal::get<std::string>(s));
00199 case SYMBOL: return f(internal::get<symbol>(s));
00200 default: throw conversion_error("invalid scalar type "+type_name(s.type()));
00201 }
00202 }
00203
00204 PN_CPP_EXTERN conversion_error make_coercion_error(const char* cpp_type, type_id amqp_type);
00205
00206 template<class T> struct coerce_op {
00207 template <class U>
00208 typename enable_if<is_convertible<U, T>::value, T>::type operator()(const U& x) {
00209 return static_cast<T>(x);
00210 }
00211 template <class U>
00212 typename enable_if<!is_convertible<U, T>::value, T>::type operator()(const U&) {
00213 throw make_coercion_error(typeid(T).name(), type_id_of<U>::value);
00214 }
00215 };
00216
00217 template <class T> T coerce(const scalar_base& s) { return visit<T>(s, coerce_op<T>()); }
00218 }
00219
00221 PN_CPP_EXTERN std::string to_string(const scalar_base& x);
00222
00223 }
00224
00225 #endif // PROTON_SCALAR_BASE_HPP