2021-12-26 23:08:08 +00:00
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# tagless-final-parsing
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2022-01-11 21:06:48 +00:00
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This repository contains collections of code snippets related to my
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[Tagless Final Parsing](https://jrpotter.github.io/posts/tagless-final-parsing/)
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blog post.
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> In his [introductory text](https://okmij.org/ftp/tagless-final/course/lecture.pdf),
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Oleg Kiselyov discusses the **tagless final** strategy for implementing DSLs.
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The approach permits leveraging the strong typing provided by some host language
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in a performant way. This post combines key thoughts from a selection of papers
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and code written on the topic. We conclude with an implementation of an
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interpreter for a toy language that runs quickly, remains strongly-typed, and
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can be extended without modification.
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2022-01-13 09:59:42 +00:00
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## Building
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2022-01-11 21:06:48 +00:00
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This repository uses Nix for reproducible builds. First
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[install Nix](https://nixos.org/download.html) if you do not currently have it
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on your system. Afterward, enable [flakes](https://nixos.wiki/wiki/Flakes) by
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adding line
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```
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experimental-features = nix-command flakes
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```
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to `$HOME/.config/nix/nix.conf`. You may then use `nix build` and `nix develop`.
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To makes things easier, we recommend using [Home Manager](https://github.com/nix-community/home-manager)
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to install [direnv](https://github.com/direnv/direnv) and [nix-direnv](https://github.com/nix-community/nix-direnv).
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Once you run
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```bash
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$ direnv allow
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```
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from the root directory, `nix develop` will be automatically invoked each time
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a change is detected in `flake.nix` or you return to the directory.
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2022-01-12 11:51:56 +00:00
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## Formatting
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Link in `.githooks` by running:
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```bash
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$ git config --local core.hooksPath .githooks/
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```
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