ppx_monoid

Syntax extension for building values of monoids
README

This is a syntax extension for OCaml to make building values of
monoids easier. Assumes the existence of two operations in scope for
some type t:

empty : t
(^^)  : t -> t -> t

ppx-monoid, triggered by the PPX extension point monoid,
reinterprets the semicolon ; to mean the monoid operation ^^ and
the unit expression () to mean empty.

Example:

let empty = "" and (^^) = (^) in
begin%monoid
  "hello";
  " ";
  "world"
end

is translated to:

let empty = "" and (^^) = (^) in
"hello" ^^ " " ^^ "world"

It is also possible to use concat or concatenate instead of
monoid:

let empty = "" and (^^) = (^) in
begin%concat   (* or 'concatenate' *)
  "hello";
  " ";
  "world"
end

See the test/test.ml file for more examples of usage, and for
examples of how the translation interacts with if then else and
match expressions.

The main use case for this syntax extension is for writing code that
generates HTML which consists of long sequences of concatenated bits
of HTML.

Install
Published
17 Jan 2020
Sources
0.3.2.tar.gz
md5=de413a86ef336834a30e9f53c6794d81
sha512=3b594411e424c2db7d3c3edf62fb1ac04f0a24b3aaf20f9df47eaa43fc696b72ec0b66ee94f824a1c5148bf93fe133c605430fe5e7ddf2df5e694ca4ec7724a8
Dependencies
ounit
with-test
ocaml-migrate-parsetree
>= "1.5.0" & < "2.0.0"
ocaml
>= "4.04.0"
dune
>= "2.0"
Reverse Dependencies