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16 lines
758 B
Markdown
16 lines
758 B
Markdown
# `checkmate`
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A tool to debug the solver (checker + inference + specialization engine).
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## Usage
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If you run into a typechecking bug and want to try to diagnose it, after minimizing, you can run a debug version of the compiler with `ROC_CHECKMATE=1` set.
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That will spit out a JSON file of the form `checkmate_<timestamp>.json`.
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You can then load them into the UI and investigate the unifications. The UI can
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be started with `npm start` in the `www` directory.
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Note that you will need Node.js and NPM installed to run the UI. Unlike other
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subprojects, this project requires external dependencies because it is fully
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optional, as an internal developer tool. A motivated contributor is free to
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rewrite the UI in a different framework, including Roc itself.
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