egison-pattern-src: Manipulating Egison patterns: abstract syntax, parser, and pretty-printer
egison-pattern-src provides a standalone syntax definition for patterns in the Egison programming language.
This package enables you to embed Egison's patterns in your parser (pretty-printer) by supplying expression and name parsers (printers) externally.
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| Versions [RSS] | 0.1.0.0, 0.1.1.0, 0.2.0.0, 0.2.1.0, 0.2.1.1, 0.2.1.2, 0.2.2.0 |
|---|---|
| Change log | CHANGELOG.md |
| Dependencies | base (>=4.8 && <5), containers (>=0.5.4 && <0.7), free (>=5.0.1 && <5.3), megaparsec (>=7.0.0 && <10.0), mtl (>=2.2.1 && <2.4), parser-combinators (>=1.0.0 && <1.3), prettyprinter (>=1.0.0 && <2.0), recursion-schemes (>=5.0.2 && <5.3), text (>=0.1.0 && <2.2) [details] |
| Tested with | ghc ==9.10.1 |
| License | BSD-3-Clause |
| Copyright | Copyright 2020 coord_e |
| Author | coord_e |
| Maintainer | coord_e <me@coord-e.com>, Satoshi Egi <egi@egison.org> |
| Category | Language, Parser, Pretty Printer |
| Home page | https://github.com/egison/egison-pattern-src#readme |
| Bug tracker | https://github.com/egison/egison-pattern-src/issues |
| Source repo | head: git clone https://github.com/egison/egison-pattern-src |
| Uploaded | by SatoshiEgi at 2025-12-19T12:02:53Z |
| Distributions | LTSHaskell:0.2.1.2, NixOS:0.2.1.2, Stackage:0.2.1.2 |
| Reverse Dependencies | 4 direct, 3 indirect [details] |
| Downloads | 2179 total (6 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs available [build log] Last success reported on 2025-12-19 [all 1 reports] |
Readme for egison-pattern-src-0.2.2.0
[back to package description]Egison Pattern Source
The egison-pattern-src provides a standalone syntax definition for patterns in the Egison programming language. This package enables you to embed Egison's patterns in your parser (pretty-printer) by supplying expression and name parsers (printers) externally.
Syntax
The following is a simplified syntax of pattern expressions where v, c, op and e are meta-variables for variable names, constructor names, user-defined infix operators, and expressions in host language, respectively.
p ::= _ (wildcard pattern)
| $v (pattern variable)
| #e (value pattern)
| ?e (predicate pattern)
| (p_1, p_2, ..., p_n) (tuple pattern)
| [p_1, p_2, ..., p_n] (collection pattern)
| p & p (and-pattern)
| p | p (or-pattern)
| !p (not-pattern)
| p op p (user-defined infix pattern)
| c p_1 p_2 ... p_n (constructor pattern)
License
egison-pattern-src is distributed as open source software under the terms of the 3 clause BSD License. See LICENSE for details.