macros.operators

Sweet.js operator macros for common operations

Example

f >>= g;          // chaining
a <*> b <*> c;    // ap
a +++ b +++ c;    // concat
a |> f; g <| a;   // piping
f ->> g; f <<- g; // function composition

Installing

$ npm install macros.operators

Using

You can either choose to use all macros, by compiling with the root module:

sjs --module macros.operators yourfile.sjs

Or choose only the appropriate macros by including each one separately:

sjs --module macros.operators/macros/applicative \
    --module macros.operators/macros/functor \
    yourfile.sjs

Available macros

alternative.sjs

• a <|> b: Alternative (a.orElse(=> b));

applicative.sjs

• a <*> b: Applicative (a.ap(b));
• a <**> b: Right-associative applicative (b.ap(a));

function.sjs

• a |> f: Forward piping (f(a));
• f <| a: Backward piping (f(a));
• f ->> g: Forward function composition (x => f(g(x)));
• g <<- f: Backward function composition (x => g(f(x)));
• a @f b, c, ...: Infix application (f(a, b, c, ...));

functor.sjs

• a <$> f: Map (a.map(f));

monad.sjs

• a >>= f: Chain (a.chain(f));
• f =<< a: Backward chain (a.chain(f));
• f >=> g: Chain composition (x => f(x).chain(g));
• g <=< f: Backward chain composition (x => f(x).chain(g));

monoid.sjs

• a +++ b: Concatenation (a.concat(b));

proto.sjs

• a::b: Prototype shorthand (a.prototype.b);

Licence

Copyright (c) 2014 Quildreen Motta.

Released under the MIT licence.