# Packages matching: installed
# Name # Installed # Synopsis
base-bigarray base
base-domains base
base-nnp base Naked pointers prohibited in the OCaml heap
base-threads base
base-unix base
conf-gmp 4 Virtual package relying on a GMP lib system installation
coq 8.18.0 The Coq Proof Assistant
coq-core 8.18.0 The Coq Proof Assistant -- Core Binaries and Tools
coq-stdlib 8.18.0 The Coq Proof Assistant -- Standard Library
coqide-server 8.18.0 The Coq Proof Assistant, XML protocol server
dune 3.13.0 Fast, portable, and opinionated build system
ocaml 5.0.0 The OCaml compiler (virtual package)
ocaml-base-compiler 5.0.0 Official release 5.0.0
ocaml-config 3 OCaml Switch Configuration
ocaml-options-vanilla 1 Ensure that OCaml is compiled with no special options enabled
ocamlfind 1.9.6 A library manager for OCaml
zarith 1.13 Implements arithmetic and logical operations over arbitrary-precision integers
# opam file:
opam-version: "2.0"
maintainer: "palmskog@gmail.com"
homepage: "https://github.com/coq-community/huffman"
dev-repo: "git+https://github.com/coq-community/huffman.git"
bug-reports: "https://github.com/coq-community/huffman/issues"
doc: "https://coq-community.org/huffman/"
license: "LGPL-2.1-or-later"
synopsis: "Coq proof of the correctness of the Huffman coding algorithm"
description: """
This projects contains a Coq proof of the correctness of the Huffman coding algorithm,
as described in David A. Huffman's paper A Method for the Construction of Minimum-Redundancy
Codes, Proc. IRE, pp. 1098-1101, September 1952."""
build: [make "-j%{jobs}%"]
install: [make "install"]
depends: [
"coq" {>= "8.12" & < "8.17~"}
]
tags: [
"category:Computer Science/Decision Procedures and Certified Algorithms/Correctness proofs of algorithms"
"category:Miscellaneous/Extracted Programs/Combinatorics"
"keyword:data compression"
"keyword:code"
"keyword:huffman tree"
"logpath:Huffman"
"date:2022-06-19"
]
authors: [
"Laurent Théry"
]
url {
src: "https://github.com/coq-community/huffman/archive/v8.15.0.tar.gz"
checksum: "sha512=06b6147a713e3f15428623ab09c9f226e626837a9e1876892a24ebdc1843c84ade0ccd8aafe53892b899dc235ff42d0e3cc11e4bd324f3ebb57e205e4fdf6a9d"
}
trueDry install with the current Coq version:
opam install -y --show-action coq-huffman.8.15.0 coq.8.18.0[NOTE] Package coq is already installed (current version is 8.18.0).
[ERROR] Package conflict!
* No agreement on the version of ocaml:
- (invariant) -> ocaml-base-compiler = 5.0.0 -> ocaml = 5.0.0
- coq-huffman = 8.15.0 -> coq < 8.17~ -> ocaml < 4.02.0
You can temporarily relax the switch invariant with `--update-invariant'
* No agreement on the version of ocaml-base-compiler:
- (invariant) -> ocaml-base-compiler = 5.0.0
- coq-huffman = 8.15.0 -> coq < 8.17~ -> ocaml < 4.02.0 -> ocaml-base-compiler = 3.07+2
* Incompatible packages:
- (invariant) -> ocaml-base-compiler = 5.0.0 -> base-nnp
- coq-huffman = 8.15.0 -> coq < 8.17~
* Missing dependency:
- coq-huffman = 8.15.0 -> coq < 8.17~ -> ocaml < 4.02.0 -> ocaml-variants >= 3.10.0 -> ocaml-beta
unmet availability conditions: 'enable-ocaml-beta-repository'
No solution found, exiting
Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:
opam remove -y coq; opam install -y --show-action --unlock-base coq-huffman.8.15.0truetrueNo files were installed.
true