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{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg }:
let
# Use astring 0.8.3 for OCaml < 4.05
param =
if stdenv.lib.versionAtLeast ocaml.version "4.05"
then {
version = "0.8.5";
sha256 = "1ykhg9gd3iy7zsgyiy2p9b1wkpqg9irw5pvcqs3sphq71iir4ml6";
} else {
version = "0.8.3";
sha256 = "0ixjwc3plrljvj24za3l9gy0w30lsbggp8yh02lwrzw61ls4cri0";
};
in
stdenv.mkDerivation {
name = "ocaml${ocaml.version}-astring-${param.version}";
inherit (param) version;
src = fetchurl {
url = "https://erratique.ch/software/astring/releases/astring-${param.version}.tbz";
inherit (param) sha256;
};
buildInputs = [ ocaml findlib ocamlbuild topkg ];
inherit (topkg) buildPhase installPhase;
meta = {
homepage = "https://erratique.ch/software/astring";
description = "Alternative String module for OCaml";
longDescription = ''
Astring exposes an alternative String module for OCaml. This module tries
to balance minimality and expressiveness for basic, index-free, string
processing and provides types and functions for substrings, string sets
and string maps.
Remaining compatible with the OCaml String module is a non-goal.
The String module exposed by Astring has exception safe functions, removes
deprecated and rarely used functions, alters some signatures and names,
adds a few missing functions and fully exploits OCaml's newfound string
immutability.
'';
license = stdenv.lib.licenses.isc;
maintainers = with stdenv.lib.maintainers; [ sternenseemann ];
};
}
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