return promises or thunks everywhere?

[sidorares]

Since generators are enabled by default in iojs and easily accessible behind flag in 0.12 it might be good to allow to yield values imagine we can have

var co   = require('co');
var x11 = require('x11');
co(function*() {
   var X = yield x11.createClient();
   var root = X.display.screen[0].root;
   var XSS = display.client.require('screen-saver');
   console.log( 'idle time: %s ', (yield XSS.QueryInfo(root)).idle );
});

instead of

var x11 = require('x11');
x11.createClient(function(err, display) {
    var X = display.client;
    X.require('screen-saver', function(err, SS) {
        if (err) throw err;
        SS.QueryInfo(display.screen[0].root, function(err, info) {
           if (err) throw err; 
           console.log('Idle time', info.idle);
        });
    });
    X.on('error', console.error);
});

not sure if it's easy to make co throw correct exception with proper stack trace when there is error from request where non-error response is not sent normally ( see #85 )

[santigimeno]

TBH I'm not familiar with promises at all :(. In case they were implemented, would the current API still be supported?

[sidorares]

Yes, current api would still be supported as we don't return anything from async function

[IonicaBizau]

Since we can promisify any function having a callback, I'm 👎 this. Should be easy to create an x11-promise and keep this module as small as possible... ❇️

[sidorares]

I'm -1 here as well but probably +1 for promise ( or dual promise + callback ) in higher level api. I already started adding promises to https://github.com/sidorares/ntk so you can do let children = await window.queryTree()