JSON for Modern C++ 3.8.0

accept
accept
accept
allocator_type
array
array_t
at
at
at
at
at
at
back
back
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
begin
begin
binary
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cbegin
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cend
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end
end
erase
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meta
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~basic_json
| ## ◆ meta()
static basic_json nlohmann::basic_json::meta | ( |  | ) |
| inline static
  This function returns a JSON object with information about the library, including the version number and information on the platform and compiler. Returns JSON object holding version information
  key | description
  --- | ---
  `compiler` | Information on the used compiler. It is an object with the following keys: `c++` (the used C++ standard), `family` (the compiler family; possible values are `clang`, `icc`, `gcc`, `ilecpp`, `msvc`, `pgcpp`, `sunpro`, and `unknown`), and `version` (the compiler version).
  `copyright` | The copyright line for the library as string.
  `name` | The name of the library as string.
  `platform` | The used platform as string. Possible values are `win32`, `linux`, `apple`, `unix`, and `unknown`.
  `url` | The URL of the project as string.
  `version` | The version of the library. It is an object with the following keys: `major`, `minor`, and `patch` as defined by Semantic Versioning, and `string` (the version string).
  Example The following code shows an example output of the `meta()` function. 1 #include <iostream> 2 #include <iomanip> 3 #include <nlohmann/json.hpp> 4 5 using json = nlohmann::json; 6 7 int main() 8 { 9 // call meta() 10 std::cout << std::setw(4) << json::meta() << '\n'; 11 } Output (play with this example online):
      {
          "compiler": {
              "c++": "201103",
              "family": "clang",
              "version": "12.0.0 (clang-1200.0.22.19)"
          },
          "copyright": "(C) 2013-2020 Niels Lohmann",
          "name": "JSON for Modern C++",
          "platform": "apple",
          "url": "https://github.com/nlohmann/json",
          "version": {
              "major": 3,
              "minor": 8,
              "patch": 0,
              "string": "3.8.0"
          }
      }
  The example code above can be translated with
      g++ -std=c++11 -Isingle_include doc/examples/meta.cpp -o meta
Exception safety Strong guarantee: if an exception is thrown, there are no changes to any JSON value. Complexity Constant. Since 2.1.0 Definition at line 16731 of file json.hpp.

nlohmann::basic_json::meta
static basic_json meta()
returns version information on the library
Definition: json.hpp:16731
nlohmann::json
basic_json<> json
default JSON class
Definition: json.hpp:2933