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anil.recoil.org
1opam-version: "2.0"
2maintainer: "Enrico Tassi <enrico.tassi@inria.fr>"
3authors: [ "Claudio Sacerdoti Coen" "Enrico Tassi" ]
4license: "LGPL-2.1-or-later"
5homepage: "https://github.com/LPCIC/elpi"
6doc: "https://LPCIC.github.io/elpi/"
7dev-repo: "git+https://github.com/LPCIC/elpi.git"
8bug-reports: "https://github.com/LPCIC/elpi/issues"
9
10build: [
11 ["dune" "subst"] {dev}
12 [make "build" "DUNE_OPTS=-p %{name}% -j %{jobs}%"]
13 [make "tests" "DUNE_OPTS=-p %{name}%" "SKIP=performance_HO" "SKIP+=performance_FO"] {with-test & os != "macos" & os-distribution != "alpine" & os-distribution != "freebsd"}
14]
15
16depends: [
17 "ocaml" {>= "4.07.0" & < "5" }
18 "stdlib-shims"
19 "ppxlib" {>= "0.12.0" & < "0.36.0"}
20 "menhir" {>= "20211230" }
21 "re" {>= "1.7.2"}
22 "ppx_deriving" {>= "4.2"}
23 "ANSITerminal" {with-test}
24 "cmdliner" {with-test}
25 "dune" {>= "2.2.0"}
26 "conf-time" {with-test}
27]
28depopts: [
29 "camlp5"
30]
31conflicts: [
32 "camlp5" {< "8" | > "8.00.03"}
33]
34synopsis: "ELPI - Embeddable λProlog Interpreter"
35description: """
36ELPI implements a variant of λProlog enriched with Constraint Handling Rules,
37a programming language well suited to manipulate syntax trees with binders.
38
39ELPI is designed to be embedded into larger applications written in OCaml as
40an extension language. It comes with an API to drive the interpreter and
41with an FFI for defining built-in predicates and data types, as well as
42quotations and similar goodies that are handy to adapt the language to the host
43application.
44
45This package provides both a command line interpreter (elpi) and a library to
46be linked in other applications (eg by passing -package elpi to ocamlfind).
47
48The ELPI programming language has the following features:
49
50- Native support for variable binding and substitution, via an Higher Order
51 Abstract Syntax (HOAS) embedding of the object language. The programmer
52 does not need to care about technical devices to handle bound variables,
53 like De Bruijn indices.
54
55- Native support for hypothetical context. When moving under a binder one can
56 attach to the bound variable extra information that is collected when the
57 variable gets out of scope. For example when writing a type-checker the
58 programmer needs not to care about managing the typing context.
59
60- Native support for higher order unification variables, again via HOAS.
61 Unification variables of the meta-language (λProlog) can be reused to
62 represent the unification variables of the object language. The programmer
63 does not need to care about the unification-variable assignment map and
64 cannot assign to a unification variable a term containing variables out of
65 scope, or build a circular assignment.
66
67- Native support for syntactic constraints and their meta-level handling rules.
68 The generative semantics of Prolog can be disabled by turning a goal into a
69 syntactic constraint (suspended goal). A syntactic constraint is resumed as
70 soon as relevant variables gets assigned. Syntactic constraints can be
71 manipulated by constraint handling rules (CHR).
72
73- Native support for backtracking. To ease implementation of search.
74
75- The constraint store is extensible. The host application can declare
76 non-syntactic constraints and use custom constraint solvers to check their
77 consistency.
78
79- Clauses are graftable. The user is free to extend an existing program by
80 inserting/removing clauses, both at runtime (using implication) and at
81 "compilation" time by accumulating files.
82
83ELPI is free software released under the terms of LGPL 2.1 or above."""
84url {
85 src:
86 "https://github.com/LPCIC/elpi/releases/download/v1.15.0/elpi-1.15.0.tbz"
87 checksum: [
88 "sha256=be94336e40ea24f0a66819977019f3956192edd8d6f705aff31b2590895780fd"
89 "sha512=8f6877f14570eb0ff73b40a41682d39eaaec643251e06a6201e084940707eb812ebe68f115a93b6fd3c0378b272d3164b64c55cf6735d5761876a77ca0e16020"
90 ]
91}
92x-commit-hash: "0f01538839a6aee7f7d075c8a302e9267d9cc5c3"