CodingWrite parser

Parse a custom file format

Use to write code that reads and extracts data from a specific text format.

The prompt
prompt.txt
Write a parser in {{language}} for the following data format.

Description of the format:
{{format_description}}

A sample of the input:
{{sample_input}}

The structure I want it parsed into:
{{target_structure}}

Requirements:
- Parse the sample correctly into the target structure.
- Handle malformed lines gracefully with clear errors.
- Avoid loading huge files entirely into memory if streaming is reasonable.

Return the parser plus a quick test against the sample.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{language}}
  • {{format_description}}
  • {{sample_input}}
  • {{target_structure}}
Recommended models
Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#parsing#file-formats#data

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