JSON for Modern C++ 1.0.0

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~basic_json
| template<template< typename U, typename V, typename...Args > class ObjectType = std::map, template< typename U, typename...Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator> template<typename CompatibleNumberFloatType , typename = typename std::enable_if< std::is_constructible<number_float_t, CompatibleNumberFloatType>::value and std::is_floating_point<CompatibleNumberFloatType>::value>::type>
nlohmann::basic_json::basic_json | ( | const CompatibleNumberFloatType | val | ) |
| inlinenoexcept
  Create an floating-point number JSON value with a given content. This constructor allows any type that can be used to construct values of type number_float_t. Examples may include the types `float`. Template Parameters
  CompatibleNumberFloatType | a floating-point type which is compatible to number_float_t.
  Parameters
  [in] | val | a floating-point to create a JSON number from
  Note RFC 7159 http://www.rfc-editor.org/rfc/rfc7159.txt, section 6 disallows NaN values: Numeric values that cannot be represented in the grammar below (such as Infinity and NaN) are not permitted. In case the parameter val is not a number, a JSON null value is created instead. Complexity Constant. Example The example below shows the construction of several JSON floating-point number values from compatible types. 1 #include <json.hpp> 2 3 using namespace nlohmann; 4 5 int main() 6 { 7 // create values of different floating-point types 8 float f42 = 42.23; 9 float f_nan = 1.0f / 0.0f; 10 double f23 = 23.42; 11 12 // create JSON numbers 13 json j42(f42); 14 json j_nan(f_nan); 15 json j23(f23); 16 17 // serialize the JSON numbers 18 std::cout << j42 << '\n'; 19 std::cout << j_nan << '\n'; 20 std::cout << j23 << '\n'; 21 } nlohmann::basic_json a class to store JSON values Definition: json.hpp:191 nlohmann namespace for Niels Lohmann Definition: json.hpp:88 Output (play with this example online):
      42.2299995422363
      null
      23.42
  The example code above can be translated with
      g++ -std=c++11 -Isrc doc/examples/basic_json__CompatibleNumberFloatType.cpp -o basic_json__CompatibleNumberFloatType
See also basic_json(const number_float_t) – create a number value (floating-point) Since version 1.0.0 Definition at line 1314 of file json.hpp.