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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Josh Holland <josh@inv.alid.pw>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu packages parser)
#:use-module (guix build-system gnu)
#:use-module (guix download)
#:use-module (guix licenses)
#:use-module (guix packages))
(define-public peg
(package
(name "peg")
(version "0.1.18")
(source (origin
(method url-fetch)
(uri (string-append
"https://www.piumarta.com/software/peg/peg-"
version ".tar.gz"))
(sha256
(base32
"114h1y4k8fwcq9m0hfk33dsp7ah8zxzjjzlk71x4iirzczfkn690"))))
(build-system gnu-build-system)
(arguments
`(#:make-flags (list "CC=gcc"
(string-append "PREFIX=" (assoc-ref %outputs "out")))
#:phases (modify-phases %standard-phases
(delete 'configure))))
(synopsis "Parser generators for Parsing Expression Grammars (PEGs)")
(description "peg and leg are tools for generating recursive-descent
parsers: programs that perform pattern matching on text. They processes a
Parsing Expression Grammar (PEG) [Ford 2004] to produce a program that
recognises legal sentences of that grammar. peg processes PEGs written using
the original syntax described by Ford; leg processes PEGs written using
slightly different syntax and conventions that are intended to make it an
attractive replacement for parsers built with lex and yacc. Unlike lex and
yacc, peg and leg support unlimited backtracking, provide ordered choice as a
means for disambiguation, and can combine scanning (lexical analysis) and
parsing (syntactic analysis) into a single activity.")
(home-page "https://www.piumarta.com/software/peg/")
(license (x11-style "file://LICENSE.txt"))))
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