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Visual json generator
Visual json generator












visual json generator
  1. #Visual json generator how to#
  2. #Visual json generator code#
  3. #Visual json generator Pc#

To generate JSON text, you need json_spirit_writer.h and json_spirit_value.h. The include files needed to read JSON text using the object library are json_spirit_reader.h and json_spirit_value.h. The use of precompiled headers should help, but I have not investigated this.

#Visual json generator code#

If you just include the header file implementation, the code will be compiled each time it is included. Linking to the object library has the advantage that the heavily templated code only has to be compiled once.

visual json generator

  • Just include the relevant header files, i.e., "header only" use.
  • Build and link in the JSON Spirit an object library.
  • However, I now realise that it basically results from the intrinsic behaviour of the std::istream_iterator constructor in immediately reading a character from its stream. I originally thought that this was caused by a bug in the boost.multi_pass iterator.

    visual json generator

    Reader.read_next( value ) // read third array Reader.read_next( value ) // read second array Istringstream is( " " ) // no white space separating arraysĬonst bool ok = reader.read_next( value ) // read first array The standard stream reading functions would fail in this case. There is a Stream_reader class to work around a bug that prevents multiple top level values that are not separated by white space from being read from a stream. This might be useful in some circumstances but would be non-standard. A vector object also allows members to have duplicate names. Note: with a vector, object members will be written out in the same order they were read in.

    visual json generator

    The vector version is faster until the number of object members reach around 10, but then gets exponentially slower. The methods used are as per the demo programs.

    #Visual json generator Pc#

    The following table shows the time in seconds it takes on my PC to extract the data from a single object of varying sizes. For the Unicode map version, use wmValue, wmObject, and wmArray. For the std::map version, use mValue instead of Value, mObject instead of Object, and mArray instead of Array. You now have the option of using mObject which is a name/value std::map. Std::map Implementationīefore version 4.00, the JSON Spirit Object type was a std::vector of name/value Pairs. The Value and wValue classes are actually instantiations of the template class Value_impl. Note that there is no support for reading Unicode files and converting them to wstrings as this is not a task specific to JSON. There are also std::wstring versions of each reader and writer function. These are called wValue, wArray, wObject, and wPair. Unicode support is provided by std::wstring versions of the JSON Spirit Value, Array, Object, and Pair types. The template getter function get_value() is an alternative to get_int(), get_real(), etc. A std::runtime_error exception is thrown if you try to get a value of the wrong type, for example, if you try to extract a string from a value containing an integer. Generally, you will know a file's format, so you will know what type the JSON values should have. You can then call the appropriate getter function. You obtain the Value's type by calling Value::type(). The Value class for Unicode is analogous for details, see the section on Unicode support.Ĭopy Code enum Value_type īool operator=( const Value& lhs ) const The interface of the JSON Spirit Value class is shown below.

    #Visual json generator how to#

  • Three small programs demonstrating how to use JSON SpiritĪ JSON value can hold either a JSON array, JSON object, string, integer, double, bool, or null.
  • An application running the library's unit tests.
  • The JSON Spirit library and header files.
  • The Visual C++ solution consists of five projects: Platform independent CMake files are included, kindly supplied by Uwe Arzt, with CPack declarations for packaging and a "make install" target supplied by Amzlkej. JSON Spirit has been built and tested with Visual C++ 2005, 2008, 2010, and G++ version 4.2.3 on Linux. However, it should compile and work on any platform compatible with Boost. The JSON Spirit source code is available as a Microsoft Visual Studio 2005 C++ "solution".
  • std::vector or std::map implementations for JSON Objects.
  • If you are already using Boost, you can use JSON Spirit without any additional dependencies. It is written using the Boost Spirit parser generator. This article describes JSON Spirit, a C++ library that reads and writes JSON files or streams. JSON is a text file format similar to XML, but less verbose.
  • Using JSON Spirit with Multiple Threads.













  • Visual json generator