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wsjq — Whitespace interpreter in jq

wsjq is an interpreter and debugger for the Whitespace programming language, written in jq.

Usage

wsjq --help
wsjq hworld.ws
wsjq run hworld.ws
whoami > name.txt
wsjq debug --in-file=name.txt --no-prompt name.ws
wsjq disasm fact.ws
wsjq --jq=gojq hworld.ws

wsjq requires at least jq 1.6 or gojq 0.12.9 (for gojq#186).

To run it with jqjq, checkout the jqjq-compat branch and use wsjqjq instead of wsjq.

Real-time I/O

wsjq prints to stdout by generating a stream of strings that are immediately emitted, rather than by appending to a buffer. wsjq sets the main input source to be stdin so that user input is streamed line-by-line with input. The contents of the Whitespace source file are then bound to the $src variable with --rawfile.

Limitations from jq

When running with jq, integers have 53 bits of precision, because jq uses 64-bit floating point numbers, and readc collapses CRLF to LF on Windows, because input strips line endings according to the current OS.

Run with gojq (--jq=gojq) to use arbitrary-precision integers and preserve line endings.

See also

bf.jq by itchyny (blog post) and bf.jq by MakeNowJust are Brainfuck interpreters written in jq, though neither support the , read operator and both display . output on program termination.

jqjq by Mattias Wadman is a jq interpreter in jq. I have contributed features to help wsjq run in jqjq.

The jq standard library filters defined in builtin.jq are a helpful reference for learning advanced usage.

License

This project is made available under the Mozilla Public License, v. 2.0.