mirror of
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124 lines
4.3 KiB
JavaScript
124 lines
4.3 KiB
JavaScript
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"use strict";
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var cr = Object.create;
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if (cr) {
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var callerCache = cr(null);
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var getterCache = cr(null);
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callerCache[" size"] = getterCache[" size"] = 0;
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}
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module.exports = function(Promise) {
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var util = require("./util");
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var canEvaluate = util.canEvaluate;
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var isIdentifier = util.isIdentifier;
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var getMethodCaller;
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var getGetter;
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if (!false) {
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var makeMethodCaller = function (methodName) {
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return new Function("ensureMethod", " \n\
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return function(obj) { \n\
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'use strict' \n\
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var len = this.length; \n\
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ensureMethod(obj, 'methodName'); \n\
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switch(len) { \n\
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case 1: return obj.methodName(this[0]); \n\
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case 2: return obj.methodName(this[0], this[1]); \n\
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case 3: return obj.methodName(this[0], this[1], this[2]); \n\
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case 0: return obj.methodName(); \n\
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default: \n\
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return obj.methodName.apply(obj, this); \n\
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} \n\
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}; \n\
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".replace(/methodName/g, methodName))(ensureMethod);
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};
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var makeGetter = function (propertyName) {
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return new Function("obj", " \n\
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'use strict'; \n\
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return obj.propertyName; \n\
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".replace("propertyName", propertyName));
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};
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var getCompiled = function(name, compiler, cache) {
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var ret = cache[name];
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if (typeof ret !== "function") {
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if (!isIdentifier(name)) {
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return null;
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}
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ret = compiler(name);
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cache[name] = ret;
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cache[" size"]++;
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if (cache[" size"] > 512) {
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var keys = Object.keys(cache);
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for (var i = 0; i < 256; ++i) delete cache[keys[i]];
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cache[" size"] = keys.length - 256;
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}
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}
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return ret;
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};
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getMethodCaller = function(name) {
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return getCompiled(name, makeMethodCaller, callerCache);
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};
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getGetter = function(name) {
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return getCompiled(name, makeGetter, getterCache);
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};
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}
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function ensureMethod(obj, methodName) {
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var fn;
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if (obj != null) fn = obj[methodName];
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if (typeof fn !== "function") {
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var message = "Object " + util.classString(obj) + " has no method '" +
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util.toString(methodName) + "'";
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throw new Promise.TypeError(message);
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}
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return fn;
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}
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function caller(obj) {
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var methodName = this.pop();
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var fn = ensureMethod(obj, methodName);
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return fn.apply(obj, this);
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}
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Promise.prototype.call = function (methodName) {
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var $_len = arguments.length;var args = new Array(Math.max($_len - 1, 0)); for(var $_i = 1; $_i < $_len; ++$_i) {args[$_i - 1] = arguments[$_i];};
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if (!false) {
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if (canEvaluate) {
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var maybeCaller = getMethodCaller(methodName);
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if (maybeCaller !== null) {
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return this._then(
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maybeCaller, undefined, undefined, args, undefined);
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}
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}
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}
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args.push(methodName);
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return this._then(caller, undefined, undefined, args, undefined);
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};
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function namedGetter(obj) {
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return obj[this];
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}
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function indexedGetter(obj) {
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var index = +this;
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if (index < 0) index = Math.max(0, index + obj.length);
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return obj[index];
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}
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Promise.prototype.get = function (propertyName) {
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var isIndex = (typeof propertyName === "number");
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var getter;
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if (!isIndex) {
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if (canEvaluate) {
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var maybeGetter = getGetter(propertyName);
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getter = maybeGetter !== null ? maybeGetter : namedGetter;
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} else {
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getter = namedGetter;
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}
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} else {
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getter = indexedGetter;
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}
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return this._then(getter, undefined, undefined, propertyName, undefined);
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};
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};
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