String-parsing in Nix

String parsers

Some string parsers written in Nix

yaml

• https://github.com/DavHau/fromYaml
• https://github.com/arcnmx/nixexprs/blob/master/lib/from-yaml.nix

toml

• https://github.com/mozilla/nixpkgs-mozilla/blob/master/lib/parseTOML.nix

xml

• https://github.com/nprindle/nix-parsec/pull/6
• fromXML builtin? (nixpkgs#57239)

yarn.lock

Lockfile for yarn, a package manager for JavaScript

• https://github.com/nix-community/dream2nix/blob/main/src/subsystems/nodejs/translators/yarn-lock/parser.nix
• https://github.com/nix-community/npmlock2nix/pull/29
• https://github.com/nprindle/nix-parsec/pull/3

mix.lock

Lockfile for mix, a package manager for Erlang

• https://github.com/nprindle/nix-parsec/pull/3

Lisp

• https://github.com/utdemir/nixlisp/blob/main/nix/parser.nix
• https://github.com/nprindle/nix-parsec/pull/4

arithmetic

• https://github.com/nprindle/nix-parsec/tree/master/examples/arithmetic

cabal.project.freeze

Lockfile for cabal, a package manager for Haskell

• https://github.com/nix-community/dream2nix/blob/main/src/subsystems/haskell/translators/cabal-freeze/parser.nix

IPv4 address

• https://github.com/NixOS/nix/issues/1491#issuecomment-318273971

UUID

• https://github.com/nprindle/nix-parsec/tree/master/examples/uuids

Linux kernel config

• https://github.com/nprindle/nix-parsec/tree/master/examples/kernel-config

Python setup.cfg

• https://github.com/seppeljordan/nix-setuptools/blob/master/lib/setuptools.nix

PureScript

• https://github.com/purs-nix/purs-nix/blob/master/parser.nix

Parser combinators

Build complex parsers from many small parsers

• https://github.com/nprindle/nix-parsec - API is similar to megaparsec in Haskell

Grammars

• antlr https://github.com/antlr/grammars-v4
• tree-sitter https://github.com/search?q=tree-sitter+grammar

See also

• Add an Earley parser builtin (nix#1491)
• purenix - compile PureScript to Nix
• String parsing in other Functional Programming Languages
  • String parsing in Haskell (google)