@@ -24,21 +25,9 @@ Other aspects were not so important to us:
...
@@ -24,21 +25,9 @@ Other aspects were not so important to us:
-**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) with a decent regular expression processor should be even faster (but would consist of more files which makes the integration harder).
## Updates since last version
As of February 2015, the following updates were made to the library
-*Changed:* In the generic class `basic_json`, all JSON value types (array, object, string, bool, integer number, and floating-point) are now **templated**. That is, you can choose whether you like a `std::list` for your arrays or an `std::unordered_map` for your objects. The specialization `json` sets some reasonable defaults.
-*Changed:* The library now consists of a **single header**, called `json.hpp`. Consequently, build systems such as Automake or CMake are not any longer required.
-*Changed:* The **deserialization** is now supported by a lexer generated with [re2c](http://re2c.org) from file [`src/json.hpp.re2c`](https://github.com/nlohmann/json/blob/master/src/json.hpp.re2c). As a result, we follow the JSON specification more strictly. Note neither the tool re2c nor its input are required to use the class.
-*Added:* The library now satisfies the [**ReversibleContainer**](http://en.cppreference.com/w/cpp/concept/ReversibleContainer) requirement. It hence provides four different iterators (`iterator`, `const_iterator`, `reverse_iterator`, and `const_reverse_iterator`), comparison functions, `swap()`, `size()`, `max_size()`, and `empty()` member functions.
-*Added*: The class uses **user-defined allocators** which default to `std::allocator`, but can be templated via parameter `Allocator`.
-*Added:* To simplify pretty-printing, the `std::setw`**stream manipulator** has been overloaded to set the desired indentation. Pretty-printing a JSON object `j` is as simple as `std::cout << std::setw(4) << j << '\n'`.
-*Changed*: The type `json::value_t::number` is now called `json::value_t::number_integer` to be more symmetric compared to `json::value_t::number_float`.
## Integration
## Integration
The single required source, `json.hpp` file is in the `src` directory. All you need to do is add
The single required source, file `json.hpp` is in the `src` directory or [released here](https://github.com/nlohmann/json/releases). All you need to do is add
```cpp
```cpp
#include "json.hpp"
#include "json.hpp"
...
@@ -53,15 +42,8 @@ to the files you want to use JSON objects. That's it. Do not forget to set the n
...
@@ -53,15 +42,8 @@ to the files you want to use JSON objects. That's it. Do not forget to set the n
Though it's 2015 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
Though it's 2015 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
- GCC 4.8
- GCC 4.8 - 5.2
- GCC 4.9
- Clang 3.4 - 3.7
- GCC 5.0
- GCC 5.1
- GCC 5.2
- Clang 3.4
- Clang 3.5
- Clang 3.6
- Clang 3.7
- Microsoft Visual C++ 14.0 RC
- Microsoft Visual C++ 14.0 RC
I would be happy to learn about other compilers/versions.
I would be happy to learn about other compilers/versions.
The 1.0.0 release should be the first "official" release after the initial announcement of the class in January 2015 via reddit ("0.1.0") and a heavily overworked second version ("0.2.0") in February.
### Changes
-*Changed:* In the generic class `basic_json`, all JSON value types (array, object, string, bool, integer number, and floating-point) are now **templated**. That is, you can choose whether you like a `std::list` for your arrays or an `std::unordered_map` for your objects. The specialization `json` sets some reasonable defaults.
-*Changed:* The library now consists of a **single header**, called `json.hpp`. Consequently, build systems such as Automake or CMake are not any longer required.
-*Changed:* The **deserialization** is now supported by a lexer generated with [re2c](http://re2c.org) from file [`src/json.hpp.re2c`](https://github.com/nlohmann/json/blob/master/src/json.hpp.re2c). As a result, we strictly follow the JSON specification. Note neither the tool re2c nor its input are required to use the class.
-*Added:* The library now satisfies the [**ReversibleContainer**](http://en.cppreference.com/w/cpp/concept/ReversibleContainer) requirement. It hence provides four different iterators (`iterator`, `const_iterator`, `reverse_iterator`, and `const_reverse_iterator`), comparison functions, `swap()`, `size()`, `max_size()`, and `empty()` member functions.
-*Added*: The class uses **user-defined allocators** which default to `std::allocator`, but can be templated via parameter `Allocator`.
-*Added:* To simplify pretty-printing, the `std::setw`**stream manipulator** has been overloaded to set the desired indentation. Pretty-printing a JSON object `j` is as simple as `std::cout << std::setw(4) << j << '\n'`.
-*Changed*: The type `json::value_t::number` is now called `json::value_t::number_integer` to be more symmetric compared to `json::value_t::number_float`.
-*Added*: The documentation is generated with Doxygen and hosted at [nlohmann.github.io/json](http://nlohmann.github.io/json/). Every public member function is thoroughly described including an example which also can be [tried online](http://melpon.org/wandbox/permlink/GnGKwji06WeVonlI).
-*Added*: The class is heavily unit-tested (3341774 assertions) and has a [line coverage of 100%](https://coveralls.io/github/nlohmann/json). With every commit, the code is compiled with g++ 4.9, g++ 5.0, Clang 3.6 (thanks to [Travis CI](https://travis-ci.org/nlohmann/json)), and Microsoft Visual Studio 14 2015 (thanks to [AppVeyor](https://ci.appveyor.com/project/nlohmann/json)).
