| #ifndef PROTON_SCALAR_BASE_HPP |
| #define PROTON_SCALAR_BASE_HPP |
| |
| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| #include "./binary.hpp" |
| #include "./decimal.hpp" |
| #include "./error.hpp" |
| #include "./internal/comparable.hpp" |
| #include "./internal/export.hpp" |
| #include "./internal/type_traits.hpp" |
| #include "./symbol.hpp" |
| #include "./timestamp.hpp" |
| #include "./type_id.hpp" |
| #include "./types_fwd.hpp" |
| #include "./uuid.hpp" |
| |
| #include <proton/type_compat.h> |
| |
| #include <iosfwd> |
| #include <string> |
| #include <typeinfo> |
| |
| /// @file |
| /// @copybrief proton::scalar_base |
| |
| namespace proton { |
| |
| class scalar_base; |
| |
| namespace codec { |
| class decoder; |
| class encoder; |
| } |
| |
| namespace internal { |
| template<class T> T get(const scalar_base& s); |
| } |
| |
| /// The base class for scalar types. |
| class scalar_base : private internal::comparable<scalar_base> { |
| public: |
| /// AMQP type of data stored in the scalar |
| PN_CPP_EXTERN type_id type() const; |
| |
| /// True if there is no value, i.e. type() == NULL_TYPE. |
| PN_CPP_EXTERN bool empty() const; |
| |
| /// Compare |
| friend PN_CPP_EXTERN bool operator<(const scalar_base& x, const scalar_base& y); |
| /// Compare |
| friend PN_CPP_EXTERN bool operator==(const scalar_base& x, const scalar_base& y); |
| /// Print the contained value |
| friend PN_CPP_EXTERN std::ostream& operator<<(std::ostream& o, const scalar_base& x); |
| |
| protected: |
| PN_CPP_EXTERN scalar_base(const pn_atom_t& a); |
| PN_CPP_EXTERN scalar_base(); |
| PN_CPP_EXTERN scalar_base(const scalar_base&); |
| PN_CPP_EXTERN scalar_base& operator=(const scalar_base&); |
| |
| PN_CPP_EXTERN void put_(bool); |
| PN_CPP_EXTERN void put_(uint8_t); |
| PN_CPP_EXTERN void put_(int8_t); |
| PN_CPP_EXTERN void put_(uint16_t); |
| PN_CPP_EXTERN void put_(int16_t); |
| PN_CPP_EXTERN void put_(uint32_t); |
| PN_CPP_EXTERN void put_(int32_t); |
| PN_CPP_EXTERN void put_(uint64_t); |
| PN_CPP_EXTERN void put_(int64_t); |
| PN_CPP_EXTERN void put_(wchar_t); |
| PN_CPP_EXTERN void put_(float); |
| PN_CPP_EXTERN void put_(double); |
| PN_CPP_EXTERN void put_(timestamp); |
| PN_CPP_EXTERN void put_(const decimal32&); |
| PN_CPP_EXTERN void put_(const decimal64&); |
| PN_CPP_EXTERN void put_(const decimal128&); |
| PN_CPP_EXTERN void put_(const uuid&); |
| PN_CPP_EXTERN void put_(const std::string&); |
| PN_CPP_EXTERN void put_(const symbol&); |
| PN_CPP_EXTERN void put_(const binary&); |
| PN_CPP_EXTERN void put_(const char* s); ///< Treated as an AMQP string |
| PN_CPP_EXTERN void put_(const null&); |
| #if PN_CPP_HAS_NULLPTR |
| PN_CPP_EXTERN void put_(decltype(nullptr)); |
| #endif |
| |
| template<class T> void put(const T& x) { putter<T>::put(*this, x); } |
| |
| private: |
| PN_CPP_EXTERN void get_(bool&) const; |
| PN_CPP_EXTERN void get_(uint8_t&) const; |
| PN_CPP_EXTERN void get_(int8_t&) const; |
| PN_CPP_EXTERN void get_(uint16_t&) const; |
| PN_CPP_EXTERN void get_(int16_t&) const; |
| PN_CPP_EXTERN void get_(uint32_t&) const; |
| PN_CPP_EXTERN void get_(int32_t&) const; |
| PN_CPP_EXTERN void get_(uint64_t&) const; |
| PN_CPP_EXTERN void get_(int64_t&) const; |
| PN_CPP_EXTERN void get_(wchar_t&) const; |
| PN_CPP_EXTERN void get_(float&) const; |
| PN_CPP_EXTERN void get_(double&) const; |
| PN_CPP_EXTERN void get_(timestamp&) const; |
| PN_CPP_EXTERN void get_(decimal32&) const; |
| PN_CPP_EXTERN void get_(decimal64&) const; |
| PN_CPP_EXTERN void get_(decimal128&) const; |
| PN_CPP_EXTERN void get_(uuid&) const; |
| PN_CPP_EXTERN void get_(std::string&) const; |
| PN_CPP_EXTERN void get_(symbol&) const; |
| PN_CPP_EXTERN void get_(binary&) const; |
| PN_CPP_EXTERN void get_(null&) const; |
| #if PN_CPP_HAS_NULLPTR |
| PN_CPP_EXTERN void get_(decltype(nullptr)&) const; |
| #endif |
| |
| |
| // use template structs, functions cannot be partially specialized. |
| template <class T, class Enable=void> struct putter { |
| static void put(scalar_base& s, const T& x) { s.put_(x); } |
| }; |
| template <class T> |
| struct putter<T, typename internal::enable_if<internal::is_unknown_integer<T>::value>::type> { |
| static void put(scalar_base& s, const T& x) { |
| s.put_(static_cast<typename internal::known_integer<T>::type>(x)); |
| } |
| }; |
| template <class T, class Enable=void> |
| struct getter { |
| static T get(const scalar_base& s) { T x; s.get_(x); return x; } |
| }; |
| template <class T> |
| struct getter<T, typename internal::enable_if<internal::is_unknown_integer<T>::value>::type> { |
| static T get(const scalar_base& s) { |
| typename internal::known_integer<T>::type x; s.get_(x); return x; |
| } |
| }; |
| |
| void ok(pn_type_t) const; |
| void set(const pn_atom_t&); |
| void set(const binary& x, pn_type_t t); |
| |
| pn_atom_t atom_; |
| binary bytes_; // Hold binary data. |
| |
| /// @cond INTERNAL |
| friend class message; |
| friend class codec::encoder; |
| friend class codec::decoder; |
| template<class T> friend T internal::get(const scalar_base& s); |
| /// @endcond |
| }; |
| |
| namespace internal { |
| |
| template<class T> T get(const scalar_base& s) { |
| return scalar_base::getter<T>::get(s); |
| } |
| |
| template <class R, class F> R visit(const scalar_base& s, F f) { |
| switch(s.type()) { |
| case BOOLEAN: return f(internal::get<bool>(s)); |
| case UBYTE: return f(internal::get<uint8_t>(s)); |
| case BYTE: return f(internal::get<int8_t>(s)); |
| case USHORT: return f(internal::get<uint16_t>(s)); |
| case SHORT: return f(internal::get<int16_t>(s)); |
| case UINT: return f(internal::get<uint32_t>(s)); |
| case INT: return f(internal::get<int32_t>(s)); |
| case CHAR: return f(internal::get<wchar_t>(s)); |
| case ULONG: return f(internal::get<uint64_t>(s)); |
| case LONG: return f(internal::get<int64_t>(s)); |
| case TIMESTAMP: return f(internal::get<timestamp>(s)); |
| case FLOAT: return f(internal::get<float>(s)); |
| case DOUBLE: return f(internal::get<double>(s)); |
| case DECIMAL32: return f(internal::get<decimal32>(s)); |
| case DECIMAL64: return f(internal::get<decimal64>(s)); |
| case DECIMAL128: return f(internal::get<decimal128>(s)); |
| case UUID: return f(internal::get<uuid>(s)); |
| case BINARY: return f(internal::get<binary>(s)); |
| case STRING: return f(internal::get<std::string>(s)); |
| case SYMBOL: return f(internal::get<symbol>(s)); |
| default: throw conversion_error("invalid scalar type "+type_name(s.type())); |
| } |
| } |
| |
| PN_CPP_EXTERN conversion_error make_coercion_error(const char* cpp_type, type_id amqp_type); |
| |
| template<class T> struct coerce_op { |
| template <class U> |
| typename enable_if<is_convertible<U, T>::value, T>::type operator()(const U& x) { |
| return static_cast<T>(x); |
| } |
| template <class U> |
| typename enable_if<!is_convertible<U, T>::value, T>::type operator()(const U&) { |
| throw make_coercion_error(typeid(T).name(), type_id_of<U>::value); |
| } |
| }; |
| |
| template <class T> T coerce(const scalar_base& s) { return visit<T>(s, coerce_op<T>()); } |
| } // namespace internal |
| |
| /// Return a readable string representation of x for display purposes. |
| PN_CPP_EXTERN std::string to_string(const scalar_base& x); |
| |
| } // proton |
| |
| #endif // PROTON_SCALAR_BASE_HPP |