From 1d055261b4144dbf86b2658437015b15d4dd9bff Mon Sep 17 00:00:00 2001
From: Richard <q@1bpm.net>
Date: Sun, 4 Sep 2022 00:32:56 +0100
Subject: initial

---
 include/jsoncons/decode_json.hpp | 209 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100644 include/jsoncons/decode_json.hpp

(limited to 'include/jsoncons/decode_json.hpp')

diff --git a/include/jsoncons/decode_json.hpp b/include/jsoncons/decode_json.hpp
new file mode 100644
index 0000000..e6ce1a1
--- /dev/null
+++ b/include/jsoncons/decode_json.hpp
@@ -0,0 +1,209 @@
+// Copyright 2017 Daniel Parker
+// Distributed under the Boost license, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See https://github.com/danielaparker/jsoncons for latest version
+
+#ifndef JSONCONS_DECODE_JSON_HPP
+#define JSONCONS_DECODE_JSON_HPP
+
+#include <iostream>
+#include <string>
+#include <tuple>
+#include <memory>
+#include <istream> // std::basic_istream
+#include <jsoncons/decode_traits.hpp>
+#include <jsoncons/json_cursor.hpp>
+
+namespace jsoncons {
+
+    // decode_json
+
+    template <class T, class Source>
+    typename std::enable_if<type_traits::is_basic_json<T>::value &&
+                            type_traits::is_sequence_of<Source,typename T::char_type>::value,T>::type
+    decode_json(const Source& s,
+                const basic_json_decode_options<typename Source::value_type>& options = basic_json_decode_options<typename Source::value_type>())
+    {
+        using char_type = typename Source::value_type;
+
+        jsoncons::json_decoder<T> decoder;
+        basic_json_reader<char_type, string_source<char_type>> reader(s, decoder, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template <class T, class Source>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value &&
+                            type_traits::is_char_sequence<Source>::value,T>::type
+    decode_json(const Source& s,
+                const basic_json_decode_options<typename Source::value_type>& options = basic_json_decode_options<typename Source::value_type>())
+    {
+        using char_type = typename Source::value_type;
+
+        basic_json_cursor<char_type,string_source<char_type>> cursor(s, options, default_json_parsing());
+        jsoncons::json_decoder<basic_json<char_type>> decoder;
+        std::error_code ec;
+        T val = decode_traits<T,char_type>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    template <class T, class CharT>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type
+    decode_json(std::basic_istream<CharT>& is,
+                const basic_json_decode_options<CharT>& options = basic_json_decode_options<CharT>())
+    {
+        jsoncons::json_decoder<T> decoder;
+        basic_json_reader<CharT, stream_source<CharT>> reader(is, decoder, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template <class T, class CharT>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type
+    decode_json(std::basic_istream<CharT>& is,
+                const basic_json_decode_options<CharT>& options = basic_json_decode_options<CharT>())
+    {
+        basic_json_cursor<CharT> cursor(is, options, default_json_parsing());
+        json_decoder<basic_json<CharT>> decoder{};
+
+        std::error_code ec;
+        T val = decode_traits<T,CharT>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.line(), cursor.column()));
+        }
+        return val;
+    }
+
+    template <class T, class InputIt>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type
+    decode_json(InputIt first, InputIt last,
+                const basic_json_decode_options<typename std::iterator_traits<InputIt>::value_type>& options = 
+                    basic_json_decode_options<typename std::iterator_traits<InputIt>::value_type>())
+    {
+        using char_type = typename std::iterator_traits<InputIt>::value_type;
+
+        jsoncons::json_decoder<T> decoder;
+        basic_json_reader<char_type, iterator_source<InputIt>> reader(iterator_source<InputIt>(first,last), decoder, options);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template <class T, class InputIt>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type
+    decode_json(InputIt first, InputIt last,
+                const basic_json_decode_options<typename std::iterator_traits<InputIt>::value_type>& options = 
+                    basic_json_decode_options<typename std::iterator_traits<InputIt>::value_type>())
+    {
+        using char_type = typename std::iterator_traits<InputIt>::value_type;
+
+        basic_json_cursor<char_type,iterator_source<InputIt>> cursor(iterator_source<InputIt>(first, last), options, default_json_parsing());
+        jsoncons::json_decoder<basic_json<char_type>> decoder;
+        std::error_code ec;
+        T val = decode_traits<T,char_type>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.line(), cursor.column()));
+        }
+        return val;
+    }
+
+    // With leading allocator parameter
+
+    template <class T,class Source,class TempAllocator>
+    typename std::enable_if<type_traits::is_basic_json<T>::value &&
+                            type_traits::is_sequence_of<Source,typename T::char_type>::value,T>::type
+    decode_json(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                const Source& s,
+                const basic_json_decode_options<typename Source::value_type>& options = basic_json_decode_options<typename Source::value_type>())
+    {
+        using char_type = typename Source::value_type;
+
+        json_decoder<T,TempAllocator> decoder(temp_alloc);
+
+        basic_json_reader<char_type, string_source<char_type>,TempAllocator> reader(s, decoder, options, temp_alloc);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template <class T,class Source,class TempAllocator>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value &&
+                            type_traits::is_char_sequence<Source>::value,T>::type
+    decode_json(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                const Source& s,
+                const basic_json_decode_options<typename Source::value_type>& options = basic_json_decode_options<typename Source::value_type>())
+    {
+        using char_type = typename Source::value_type;
+
+        basic_json_cursor<char_type,string_source<char_type>,TempAllocator> cursor(s, options, default_json_parsing(), temp_alloc);
+        json_decoder<basic_json<char_type,sorted_policy,TempAllocator>,TempAllocator> decoder(result_allocator_arg, temp_alloc, temp_alloc);
+
+        std::error_code ec;
+        T val = decode_traits<T,char_type>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+    template <class T,class CharT,class TempAllocator>
+    typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type
+    decode_json(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                std::basic_istream<CharT>& is,
+                const basic_json_decode_options<CharT>& options = basic_json_decode_options<CharT>())
+    {
+        json_decoder<T,TempAllocator> decoder(temp_alloc);
+
+        basic_json_reader<CharT, stream_source<CharT>,TempAllocator> reader(is, decoder, options, temp_alloc);
+        reader.read();
+        if (!decoder.is_valid())
+        {
+            JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column()));
+        }
+        return decoder.get_result();
+    }
+
+    template <class T,class CharT,class TempAllocator>
+    typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type
+    decode_json(temp_allocator_arg_t, const TempAllocator& temp_alloc,
+                std::basic_istream<CharT>& is,
+                const basic_json_decode_options<CharT>& options = basic_json_decode_options<CharT>())
+    {
+        basic_json_cursor<CharT,stream_source<CharT>,TempAllocator> cursor(is, options, default_json_parsing(), temp_alloc);
+        json_decoder<basic_json<CharT,sorted_policy,TempAllocator>,TempAllocator> decoder(result_allocator_arg, temp_alloc,temp_alloc);
+
+        std::error_code ec;
+        T val = decode_traits<T,CharT>::decode(cursor, decoder, ec);
+        if (ec)
+        {
+            JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column()));
+        }
+        return val;
+    }
+
+} // jsoncons
+
+#endif
+
-- 
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