Simple AST

SimpleAST.js

// Simple AST
{
  type: "Program",
  body: [
    {
      type: "CallExpression",
      name: "concat",
      params: [
        {
          type: "StringLiteral",
          value: "Number :"
        },
        {
          type: "CallExpression",
          name: "add",
          params: [
            {
              type: "NumberLiteral",
              value: "2"
            },
            {
              type: "NumberLiteral",
              value: "3"
            }
          ]
        }
      ]
    }
  ]
};