ps-inline-asm

What is this?

A tool for allowing inline javascript in purescript projects.

For example:

square :: Number -> Number
square x = asm "Math.pow( #{x}, 2 )"

-- Alternative implementation
square' :: Number -> Number
square' = asm "x => Math.pow( x, 2 )"

Also see the example/ directory.

How do I use it?

Run

node ./src/main.js --in=<src> --out=<out>

With <src> is a directory contianing .purs files, among other files. <src> will be cloned into <out> and then modified so that all inline ASM is compiled into normal Purescript code.

How does it work?

In short, an expression like

asm "#{a} + #{b}"

is turned into

asm_0 a b

and a corresponding

foreign import asm_0 :: forall a. a

is emitted in the Purescript source, and its implementation

exports.asm_0 = a => b => a + b;

is emitted in the foreign module.

Should I use it?

If you want to!

I wanted inline ASM, so I made this tool. Some people will disagree with the concept. That's fine.

Is it production-ready?

Not yet!

I don't see any obvious flaws in the general design, but the implementation currently has some issues and is highly untested.