commit 9038bf6be4d9428a4d03fc61b44d1c7956211d35 · anil.recoil.org/opam-repository

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packages/elpi/elpi.1.14.0/opam

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       opam-version: "2.0"

     

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       maintainer: "Enrico Tassi <enrico.tassi@inria.fr>"

     

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       authors: [ "Claudio Sacerdoti Coen" "Enrico Tassi" ]

     

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       license: "LGPL-2.1-or-later"

     

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       homepage: "https://github.com/LPCIC/elpi"

     

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       doc: "https://LPCIC.github.io/elpi/"

     

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       dev-repo: "git+https://github.com/LPCIC/elpi.git"

     

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       bug-reports: "https://github.com/LPCIC/elpi/issues"

     

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       build: [

     

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         ["dune" "subst"] {dev}

     

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         [make "build" "DUNE_OPTS=-p %{name}% -j %{jobs}%"]

     

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         [make "tests" "DUNE_OPTS=-p %{name}%" "TIMEOUT=240"] {with-test & os != "macos" & os-distribution != "alpine" & os-distribution != "freebsd"}

     

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       ]

     

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       depends: [

     

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         "ocaml" {>= "4.04.0"}

     

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         "stdlib-shims"

     

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         "camlp5" {< "7.99"}

     

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         "ppxlib" {>= "0.12.0" }

     

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         "re" {>= "1.7.2"}

     

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         "ppx_deriving" {>= "4.2"}

     

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         "ANSITerminal" {with-test}

     

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         "cmdliner" {with-test}

     

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         "dune" {>= "2.2.0"}

     

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         "conf-time" {with-test}

     

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       ]

     

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       synopsis: "ELPI - Embeddable λProlog Interpreter"

     

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       description: """

     

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       ELPI implements a variant of λProlog enriched with Constraint Handling Rules,

     

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       a programming language well suited to manipulate syntax trees with binders.

     

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       ELPI is designed to be embedded into larger applications written in OCaml as

     

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       an extension language. It comes with an API to drive the interpreter and 

     

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       with an FFI for defining built-in predicates and data types, as well as

     

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       quotations and similar goodies that are handy to adapt the language to the host

     

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       application.

     

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       This package provides both a command line interpreter (elpi) and a library to

     

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       be linked in other applications (eg by passing -package elpi to ocamlfind).

     

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       The ELPI programming language has the following features:

     

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       - Native support for variable binding and substitution, via an Higher Order

     

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         Abstract Syntax (HOAS) embedding of the object language. The programmer needs

     

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         not to care about De Bruijn indexes.

     

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       - Native support for hypothetical context. When moving under a binder one can

     

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         attach to the bound variable extra information that is collected when the

     

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         variable gets out of scope. For example when writing a type-checker the

     

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         programmer needs not to care about managing the typing context.

     

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       - Native support for higher order unification variables, again via HOAS.

     

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         Unification variables of the meta-language (λProlog) can be reused to

     

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         represent the unification variables of the object language. The programmer

     

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         does not need to care about the unification-variable assignment map and

     

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         cannot assign to a unification variable a term containing variables out of

     

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         scope, or build a circular assignment.

     

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       - Native support for syntactic constraints and their meta-level handling rules.

     

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         The generative semantics of Prolog can be disabled by turning a goal into a

     

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         syntactic constraint (suspended goal). A syntactic constraint is resumed as

     

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         soon as relevant variables gets assigned. Syntactic constraints can be

     

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         manipulated by constraint handling rules (CHR).

     

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       - Native support for backtracking. To ease implementation of search.

     

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       - The constraint store is extensible.  The host application can declare

     

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         non-syntactic constraints and use custom constraint solvers to check their

     

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         consistency.

     

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       - Clauses are graftable. The user is free to extend an existing program by

     

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         inserting/removing clauses, both at runtime (using implication) and at

     

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         "compilation" time by accumulating files.

     

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       ELPI is free software released under the terms of LGPL 2.1 or above."""

     

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       url {

     

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         src:

     

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           "https://github.com/LPCIC/elpi/releases/download/v1.14.0/elpi-1.14.0.tbz"

     

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         checksum: [

     

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           "sha256=acc61ab4f9d9b80cc2b1d848bf3ed1c121634e8b42e0dfe086005a76b79ec2ec"

     

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           "sha512=de851b0cb1bd65e18fdc2b4a992a52eceb4c8e68a059e3652d7cfe525f0d31303ce323c2c20f01c55a633a6481adba05d16cc4c7f44707e189c073e759a1accd"

     

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         ]

     

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       }

     

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       x-commit-hash: "d607597c71515554ed9b9a3e430ccecdc50400f4"