Using jq -re '""' allows validation of JSON data without processing its contents. The -r flag in jq is used to output raw strings without additional formatting. The -e flag in jq sets the exit status to 1 in case of parsing errors. Modifying JSON data to introduce errors is a common practice for testing error handling.

JSON in C can be handled using the cJSON library, which is an open-source library available under the MIT License. It provides a simple and easy-to-use API for parsing, creating, and manipulating JSON data. The cJSON library is written in C and has no external dependencies, making it easy to integrate into C programs.

The only way this can be done is to include comments as data pairs in a JSON file. It is not a commonly used or recommended practice, but technically it's the best way to add comments to your JSON file. Create a custom element within your JSON object, such as "_comment", to distinguish them from the rest of the data.