JSON Toolkit is a swiss-army knife for JSON programming in modern C++. It comes with a built-in parser and growing support for standards such as JSON Schema, JSON Pointer, JSONL, and more. It targets C++20 and supports the Clang, GCC, and MSVC compilers on macOS, GNU/Linux, FreeBSD, Windows, and Unikraft (through the ELF loader).
Installation
As a git submodule
# Add the project as a submodule, in this case to deps/jsontoolkit
$ git submodule add https://github.com/sourcemeta/jsontoolkit.git deps/jsontoolkit
# Add the project as a CMake subdirectory
add_subdirectory("${PROJECT_SOURCE_DIR}/deps/jsontoolkit")
# Link your targets accordingly
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::json)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonschema)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonpointer)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonl)
Using FetchContent
cmake_minimum_required(VERSION 3.14)
project(my_project)
set(CMAKE_CXX_STANDARD 20)
include(FetchContent)
FetchContent_Declare(
jsontoolkit
URL https://github.com/sourcemeta/jsontoolkit/archive/<commit-sha>.zip
DOWNLOAD_EXTRACT_TIMESTAMP NO)
FetchContent_MakeAvailable(jsontoolkit)
add_executable(my_example ...)
target_link_libraries(my_example PUBLIC sourcemeta::jsontoolkit::json)
target_link_libraries(my_example PUBLIC sourcemeta::jsontoolkit::jsonschema)
target_link_libraries(my_example PUBLIC sourcemeta::jsontoolkit::jsonpointer)
target_link_libraries(my_example PUBLIC sourcemeta::jsontoolkit::jsonl)
Using find_package
Assuming you have installed JSON Toolkit in a place where CMake can find the package config file:
find_package(JSONToolkit REQUIRED)
# This package also supports component-based inclusion
find_package(JSONToolkit REQUIRED COMPONENTS json jsonschema jsonpointer jsonl)
# Link your targets accordingly
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::json)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonschema)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonpointer)
target_link_libraries(my_executable_or_library PUBLIC sourcemeta::jsontoolkit::jsonl)
At the moment of this writing, JSON Toolkit is available with find_package
integration on the following package managers:
# Homebrew
$ brew install jsontoolkit
CMake
Options
Option | Type | Default | Description |
JSONTOOLKIT_URI | Boolean | ON | Build the JSON Toolkit URI library |
JSONTOOLKIT_JSON | Boolean | ON | Build the JSON Toolkit JSON library |
JSONTOOLKIT_JSONSCHEMA | Boolean | ON | Build the JSON Toolkit JSON Schema library |
JSONTOOLKIT_JSONPOINTER | Boolean | ON | Build the JSON Toolkit JSON Pointer library |
JSONTOOLKIT_JSONL | Boolean | ON | Build the JSON Toolkit JSONL library |
JSONTOOLKIT_TESTS | Boolean | OFF | Build the JSON Toolkit tests |
JSONTOOLKIT_DOCS | Boolean | OFF | Build the JSON Toolkit docs |
JSONTOOLKIT_INSTALL | Boolean | ON | Install the JSON Toolkit library |
JSONTOOLKIT_ADDRESS_SANITIZER | Boolean | OFF | Enable the address sanitizer |
JSONTOOLKIT_UNDEFINED_SANITIZER | Boolean | OFF | Enable the undefined behavior sanitizer |
Components
If you install JSON Toolkit from source, keep in mind that the project is split into a set of CMake components:
Component | Description |
sourcemeta_jsontoolkit | The core JSON Toolkit libraries |
sourcemeta_jsontoolkit_dev | The JSON Toolkit headers and development files |
Contributing
JSON Toolkit makes use of the CMake build system. You can configure, build and test the project as follows:
cmake -S . -B ./build \
-DCMAKE_BUILD_TYPE:STRING=<Debug|Release> \
-DCMAKE_COMPILE_WARNING_AS_ERROR:BOOL=ON \
-DJSONTOOLKIT_DOCS:BOOL=ON \
-DJSONTOOLKIT_TESTS:BOOL=ON
# Format the code
cmake --build ./build --config <Debug|Release> --target clang_format
# Build the project
cmake --build ./build --config <Debug|Release>
# Run the test suite
ctest --test-dir ./build --build-config <Debug|Release> --output-on-failure --progress
Or simply run:
# On UNIX-based systems
make
# On Windows
nmake