Rev nlohmann/json

This commit is contained in:
Adam Ierymenko 2016-08-10 17:27:46 -07:00
parent 7d906df805
commit dd21c8a577
2 changed files with 1323 additions and 1068 deletions

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@ -1,10 +1,10 @@
![JSON for Modern C++](https://raw.githubusercontent.com/nlohmann/json/master/doc/json.gif)
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@ -24,7 +24,7 @@ Other aspects were not so important to us:
- **Memory efficiency**. Each JSON object has an overhead of one pointer (the maximal size of a union) and one enumeration element (1 byte). The default generalization uses the following C++ data types: `std::string` for strings, `int64_t`, `uint64_t` or `double` for numbers, `std::map` for objects, `std::vector` for arrays, and `bool` for Booleans. However, you can template the generalized class `basic_json` to your needs.
- **Speed**. We currently implement the parser as naive [recursive descent parser](http://en.wikipedia.org/wiki/Recursive_descent_parser) with hand coded string handling. It is fast enough, but a [LALR-parser](http://en.wikipedia.org/wiki/LALR_parser) with a decent regular expression processor should be even faster (but would consist of more files which makes the integration harder).
- **Speed**. We currently implement the parser as naive [recursive descent parser](http://en.wikipedia.org/wiki/Recursive_descent_parser) with hand coded string handling. It is fast enough, but a [LALR-parser](http://en.wikipedia.org/wiki/LALR_parser) may be even faster (but would consist of more files which makes the integration harder).
See the [contribution guidelines](https://github.com/nlohmann/json/blob/master/.github/CONTRIBUTING.md#please-dont) for more information.
@ -291,7 +291,7 @@ json j_umset(c_umset); // both entries for "one" are used
// maybe ["one", "two", "one", "four"]
```
Likewise, any associative key-value containers (`std::map`, `std::multimap`, `std::unordered_map`, `std::unordered_multimap`) whose keys are can construct an `std::string` and whose values can be used to construct JSON types (see examples above) can be used to to create a JSON object. Note that in case of multimaps only one key is used in the JSON object and the value depends on the internal order of the STL container.
Likewise, any associative key-value containers (`std::map`, `std::multimap`, `std::unordered_map`, `std::unordered_multimap`) whose keys can construct an `std::string` and whose values can be used to construct JSON types (see examples above) can be used to to create a JSON object. Note that in case of multimaps only one key is used in the JSON object and the value depends on the internal order of the STL container.
```cpp
std::map<std::string, int> c_map { {"one", 1}, {"two", 2}, {"three", 3} };
@ -323,7 +323,7 @@ json j_original = R"({
})"_json;
// access members with a JSON pointer (RFC 6901)
j_original["/baz/2"_json_pointer];
j_original["/baz/1"_json_pointer];
// "two"
// a JSON patch (RFC 6902)
@ -344,8 +344,8 @@ json j_result = j_original.patch(j_patch);
json::diff(j_result, j_original);
// [
// { "op":" replace", "path": "/baz", "value": ["one", "two", "three"] },
// { "op":"remove","path":"/hello" },
// { "op":"add","path":"/foo","value":"bar" }
// { "op": "remove","path": "/hello" },
// { "op": "add", "path": "/foo", "value": "bar" }
// ]
```
@ -390,7 +390,7 @@ Though it's 2016 already, the support for C++11 is still a bit sparse. Currently
- GCC 4.9 - 6.0 (and possibly later)
- Clang 3.4 - 3.9 (and possibly later)
- Microsoft Visual C++ 2015 / 14.0 (and possibly later)
- Microsoft Visual C++ 2015 / Build Tools 14.0.25123.0 (and possibly later)
I would be happy to learn about other compilers/versions.
@ -483,6 +483,9 @@ I deeply appreciate the help of the following people.
- [Róbert Márki](https://github.com/robertmrk) added a fix to use move iterators and improved the integration via CMake.
- [Chris Kitching](https://github.com/ChrisKitching) cleaned up the CMake files.
- [Tom Needham](https://github.com/06needhamt) fixed a subtle bug with MSVC 2015 which was also proposed by [Michael K.](https://github.com/Epidal).
- [Mário Feroldi](https://github.com/thelostt) fixed a small typo.
- [duncanwerner](https://github.com/duncanwerner) found a really embarrassing performance regression in the 2.0.0 release.
- [Damien](https://github.com/dtoma) fixed one of the last conversion warnings.
Thanks a lot for helping out!
@ -502,7 +505,7 @@ $ make
$ ./json_unit "*"
===============================================================================
All tests passed (5568721 assertions in 32 test cases)
All tests passed (8905012 assertions in 32 test cases)
```
For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).

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