My implementaion of a JSON parser in Go. It returns exit code 0 for a valid JSON file, otherwise exits with code 1 and prints an error message with line & column number.

Example: for the following input file

{
  "key1": true,
  "key2": False,
  "key3": null,
  "key4": "value",
  "key5": 101
}

it would print

error: unexpected character 'F' at line 3, column 11

json-parser FILE

go build

./json-parser FILE

go run . FILE

• It's fun.
• I was learning Go & it's better to learn it this way.
• I was curious on how these langauge parsers worked under the hood.
• And I found this amazing website by John Crickett where he publish challenges which are divided into steps. Challenge - Write Your Own JSON Parser.

I didn't know how to get started with this cuz I had no idea on how to implement a Lexer & Parser. @eatonphil's blog post on the topic helped me a lot. Do check it out!