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/**
|
* Expose compositor.
|
*/
|
|
module.exports = compose;
|
|
/**
|
* Compose `middleware` returning
|
* a fully valid middleware comprised
|
* of all those which are passed.
|
*
|
* @param {Array} middleware
|
* @return {Function}
|
* @api public
|
*/
|
|
function compose(middleware){
|
return function *(next){
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if (!next) next = noop();
|
|
var i = middleware.length;
|
|
while (i--) {
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next = middleware[i].call(this, next);
|
}
|
|
return yield *next;
|
}
|
}
|
|
/**
|
* Noop.
|
*
|
* @api private
|
*/
|
|
function *noop(){}
|
