JSON Parser

A C++ app that parses JSON and evaluates user expressions.

Features

• Evaluating trivial expressions with JSON paths
• min() and max() functions
  • Work with an array or multiple arguments
• size() function
  • Works with arrays and objects
• Expressions and functions in the subscript operator []
  • Allows for recursive function and expression calls
• Binary arithmetic operations with expressions

Using the Application

Prerequisites

• C++ 20 or later
• CMake 3.29 or later

Buidling the Project

• Clone the repository.

git clone https://github.com/markovolimango/JSON-Parser.git

• Create a build directory and navigate to it.

cd JSON-Parser
mkdir build
cd build

• Generate the build files using CMake.

cmake ..

• Build the project.

make

Running the expression evaluation

• Place your JSON file in the build directory.
• Run the json_eval executable and input the file name and expression.

./json_eval
[filename] [expression]

Examples:

./json_eval
test.json a.b[1]

./json_eval
test.json a.b[max(0,a.b[1])]

./json_eval
test.json a.b[3][1]+a.b[size(a)]

Running the tests

• Just run the tests executable.

./tests