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@esy-ocaml/bs-platform
Advanced tools
bucklescript compiler, ocaml standard libary by bucklescript and its required runtime support
BuckleScript: A JavaScript backend for OCaml focused on smooth integration and clean generated code.
Please see the documentation site.
See CONTRIBUTING.md.
BuckleScript leverages the existing OCaml compiler and toolchain to produce JavaScript that closely resembles the original OCaml. This has several immediate advantages:
These points make the integration of JavaScript with OCaml very clean and smooth. In this way, BuckleScript provides all the benefits of OCaml's excellent compiler and sophisticated type system alongside the rich cross-platform JavaScript ecosystem.
Basic examples of using BuckleScript are provided below. More extensive examples are available at https://github.com/bucklescript/bucklescript-addons.
This example creates a simple http server. The complete code is available here.
The attribute [@bs]
used in the example below is one of the OCaml attributes mentioned earlier.
When BuckleScript generates code, it may use either a curried (OCaml) or uncurried (JavaScript)
calling convention depending on how the code gets optimized. The [@bs]
attribute can be used to
decorate functions and call-sites so that generated code is guaranteed to use the uncurried style.
This guarantee eases integration with existing JavaScript code and avoids unnecessary overhead.
let port = 3000
let hostname = "127.0.0.1"
let create_server http =
let server = http##createServer begin fun [@bs] req resp ->
resp##statusCode #= 200;
resp##setHeader "Content-Type" "text/plain";
resp##_end "Hello world\n"
end
in
server##listen port hostname begin fun [@bs] () ->
Js.log ("Server running at http://"^ hostname ^ ":" ^ Pervasives.string_of_int port ^ "/")
end
let () = create_server Http_types.http
'use strict';
var Pervasives = require("bs-platform/lib/js/pervasives");
var Http = require("http");
var hostname = "127.0.0.1";
function create_server(http) {
var server = http.createServer(function (_, resp) {
resp.statusCode = 200;
resp.setHeader("Content-Type", "text/plain");
return resp.end("Hello world\n");
});
return server.listen(3000, hostname, function () {
console.log("Server running at http://" + (hostname + (":" + (Pervasives.string_of_int(3000) + "/"))));
return /* () */0;
});
}
create_server(Http);
This example demonstrates the use of immutable data structures. The OCaml code uses the BuckleScript
compiled OCaml standard library. The JavaScript code, given as a point of comparison, uses the
Facebook immutable
library.
This comparison is somewhat contrived but nevertheless the BuckleScript compiled version has several nice characteristics:
Execution Time:
Compiled Size:
module IntMap = Map.Make(struct
type t = int
let compare (x : int) y = compare x y
end)
let test () =
let m = ref IntMap.empty in
let count = 1000000 in
for i = 0 to count do
m := IntMap.add i i !m
done;
for i = 0 to count do
ignore (IntMap.find i !m)
done
let () = test()
immutable
)'use strict';
var Immutable = require('immutable');
var Map = Immutable.Map;
var m = new Map();
function test() {
var count = 1000000;
for(var i = 0; i < count; ++i) {
m = m.set(i, i);
}
for(var j = 0; j < count; ++j) {
m.get(j);
}
}
test();
ninja
is a truly well engineered scalable build toolSee COPYING and COPYING.LESSER
The ocaml
directory contains the official OCaml compiler (version 4.02.3).
Refer to its copyright and license notices for information about its licensing.
The ninja-build
directory contains the official ninja-build (version 1.7.2).
Refer to its copyright and license notices for information about its licensing.
BuckleScript builds on parts of js_of_ocaml:
jscomp/core/js_dump.ml
(pretty printer)jscomp/runtime
BuckleScript builds on parts of OCaml:
These modules were adapted from ocaml/bytecomp/simplif.ml
for
JavaScript specific optimization purposes.
jscomp/core/js_main.ml
is adapted from ocaml/driver/main.ml
. It is not
actively used but demonstrates that it is easy to assemble a whole compiler using the OCaml compiler
libraries. It also shows how to add more compilation flags to a JS backend.
jscomp/stdlib
is copied from ocaml/stdlib
. It is compiled to JavaScript and
included with BuckleScript.
jscomp/test
is based on ocaml/testsuite
.
BuckleScript unittest builds on parts of OUnit
jscomp/ounit
is adapted from ounit, the unit test
utilities are only used for dev purpose, they are not required for distributionFAQs
bucklescript compiler, ocaml standard libary by bucklescript and its required runtime support
The npm package @esy-ocaml/bs-platform receives a total of 1 weekly downloads. As such, @esy-ocaml/bs-platform popularity was classified as not popular.
We found that @esy-ocaml/bs-platform demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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