look into passing `next` into each function

[jongleberry]

like regular middleware. might be needed to support #14

still think it's an anti-pattern MOST of the time since your logic should be refactored into functions, not middleware.

[Ivan Fraixedes]

@jonathanong my understanding is that you would like that "route" functions signature only receive the context (ctx) and the next one in the list, are called when the previous returns;

Silly example:

function call1(ctx) {
  ctx.body = ['called-1']
}

function call2(ctx) {
  ctx.body.push('called-2')
}

function call3(ctx) {
  ctx.body.push('called-3')
  ctx.body = ctx.body.join(':')
}

const app = new Koa()
app.use(match('/a/b', [call1, call2, call3]))

// Response body should be a string with value 'called1:called2:called3'

when I look to that, I see it's neater, however I wouldn't like to miss the possibility to have middlewares only in some routes, for example

const bodyParser = require('koa-bodyparser')
const pathMatch = require('koa-path-match')
...

function loginPage(ctx) {
  // Render login page
}

function verifyLogin(ctx) {
 // do things to validate and responds
}

const match = pathMatch()
const parser = bodyParser()
const app = new Koa()

app.use(match('/login')
   .get(loginPage)
   .post([parser, verifyLogin])

If we don't pass next to the route functions then bodyParser cannot be used only in the post verb, I would have to add as a middleware before match middleware. Correct?