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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=disroot.org header.s=mail header.b=H+LoIhOJ; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -1.47 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=disroot.org header.s=mail header.b=H+LoIhOJ; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 73A5C89B4 X-Spam-Score: -1.47 X-Migadu-Scanner: scn1.migadu.com X-TUID: JaUlWgJULdcQ * gnu/packages/ocaml.scm (ocaml-elpi) --- gnu/packages/ocaml.scm | 102 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm index 0e8e5b2..59f324e 100644 --- a/gnu/packages/ocaml.scm +++ b/gnu/packages/ocaml.scm @@ -26,6 +26,7 @@ ;;; Copyright © 2021 Sarah Morgensen ;;; Copyright © 2022 Maxim Cournoyer ;;; Copyright © 2022 John Kehayias +;;; Copyright © 2022 Garek Dyszel ;;; ;;; This file is part of GNU Guix. ;;; @@ -8741,3 +8742,104 @@ (define-public ocaml-bibtex2html (description "This package allows you to produce, from a set of bibliography files in BibTeX format, a bibliography in HTML format.") (license license:gpl2))) + +(define-public ocaml-elpi + (package + (name "ocaml-elpi") + ;; For more information on which version works with Coq 8.15, + ;; see the relevant issue: + ;; https://github.com/math-comp/hierarchy-builder/issues/297 + ;; Here we use + ;; coq-elpi 1.14.0 + ocaml-elpi 1.15.2 + + ;; coq-mathcomp-hierarchy-builder 1.3.0 (Coq 8.15) + ;; + ;; The package ocaml-elpi@1.16.5 appears to require a different + ;; build process. + (version "1.15.2") + (source (origin + (method git-fetch) + (uri (git-reference + (url "https://github.com/LPCIC/elpi") + (commit (string-append "v" version)) + (recursive? #t))) + (file-name (git-file-name name version)) + (sha256 + (base32 + "0swzqabwrxqb6sz8zpild2lfcnk3l0zxi9fw61dy2g1pzws2j2jy")))) + (build-system dune-build-system) + (arguments + `(;; When running phase 'check', fails with the error: + ;; Error: Don't know about directory test specified on the + ;; command line! + ;; + ;; The "make tests" command requires replacing /usr/bin/time + ;; with the location of the input package "time". + #:tests? #f)) + (propagated-inputs (list ocaml-stdlib-shims + ocaml-ppxlib + ocaml-menhir + ocaml-re + ocaml-ppx-deriving + ocaml-atdgen + ocaml-atdts + ocaml-camlp-streams + ocaml-biniou + ocaml-yojson)) + (native-inputs (list ocaml-ansiterminal ocaml-cmdliner time)) + (home-page "https://github.com/LPCIC/elpi") + (synopsis "ELPI - Embeddable λProlog Interpreter") + (description + "ELPI implements a variant of λProlog enriched with Constraint +Handling Rules, a programming language well suited to manipulate +syntax trees with binders. + +ELPI is designed to be embedded into larger applications written in +OCaml as an extension language. It comes with an API to drive the +interpreter and with an FFI for defining built-in predicates and data +types, as well as quotations and similar goodies that are handy to +adapt the language to the host application. + +This package provides both a command line interpreter (elpi) and a +library to be linked in other applications (eg by passing -package +elpi to ocamlfind). + +The ELPI programming language has the following features: + +- Native support for variable binding and substitution, via an Higher +Order Abstract Syntax (HOAS) embedding of the object language. The +programmer does not need to care about technical devices to handle +bound variables, like De Bruijn indices. + +- Native support for hypothetical context. When moving under a binder +one can attach to the bound variable extra information that is +collected when the variable gets out of scope. For example when +writing a type-checker the programmer needs not to care about managing +the typing context. + +- Native support for higher order unification variables, again via +HOAS. Unification variables of the meta-language (λProlog) can be +reused to represent the unification variables of the object language. +The programmer does not need to care about the unification-variable +assignment map and cannot assign to a unification variable a term +containing variables out of scope, or build a circular assignment. + +- Native support for syntactic constraints and their meta-level +handling rules. The generative semantics of Prolog can be disabled by +turning a goal into a syntactic constraint (suspended goal). A +syntactic constraint is resumed as soon as relevant variables gets +assigned. Syntactic constraints can be manipulated by constraint +handling rules (CHR). + +- Native support for backtracking. To ease implementation of search. + +- The constraint store is extensible. The host application can declare +non-syntactic constraints and use custom constraint solvers to check +their consistency. + +- Clauses are graftable. The user is free to extend an existing +program by inserting/removing clauses, both at runtime (using +implication) and at \"compilation\" time by accumulating files. + +ELPI is free software released under the terms of LGPL 2.1 or above.") + (license license:lgpl2.1))) + -- 2.37.2