method.js•1.77 kB
"use strict";
module.exports =
function(Promise, INTERNAL, tryConvertToPromise, apiRejection, debug) {
var util = require("./util");
var tryCatch = util.tryCatch;
Promise.method = function (fn) {
if (typeof fn !== "function") {
throw new Promise.TypeError("expecting a function but got " + util.classString(fn));
}
return function () {
var ret = new Promise(INTERNAL);
ret._captureStackTrace();
ret._pushContext();
var value = tryCatch(fn).apply(this, arguments);
var promiseCreated = ret._popContext();
debug.checkForgottenReturns(
value, promiseCreated, "Promise.method", ret);
ret._resolveFromSyncValue(value);
return ret;
};
};
Promise.attempt = Promise["try"] = function (fn) {
if (typeof fn !== "function") {
return apiRejection("expecting a function but got " + util.classString(fn));
}
var ret = new Promise(INTERNAL);
ret._captureStackTrace();
ret._pushContext();
var value;
if (arguments.length > 1) {
debug.deprecated("calling Promise.try with more than 1 argument");
var arg = arguments[1];
var ctx = arguments[2];
value = util.isArray(arg) ? tryCatch(fn).apply(ctx, arg)
: tryCatch(fn).call(ctx, arg);
} else {
value = tryCatch(fn)();
}
var promiseCreated = ret._popContext();
debug.checkForgottenReturns(
value, promiseCreated, "Promise.try", ret);
ret._resolveFromSyncValue(value);
return ret;
};
Promise.prototype._resolveFromSyncValue = function (value) {
if (value === util.errorObj) {
this._rejectCallback(value.e, false);
} else {
this._resolveCallback(value, true);
}
};
};