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Use Proxy for array()

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This commit is contained in:
Kris Maglione
2014-03-16 14:49:28 -07:00
parent af88d531d0
commit 6d36b7f374
1 changed files with 32 additions and 17 deletions
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49
common/modules/base.jsm
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@@ -1646,6 +1646,19 @@ const Iter = Class("Iter", {
});
iter.Iter = Iter;
function arrayWrap(fn) {
function wrapper() {
let res = fn.apply(this, arguments);
if (isArray(res))
return array(res);
if (isinstance(res, ["Iterator", "Generator"]))
return iter(res);
return res;
}
wrapper.wrapped = fn;
return wrapper;
}
/**
* Array utility methods.
*/
@@ -1656,23 +1669,25 @@ var array = Class("array", Array, {
else if (ary.length)
ary = Array.slice(ary);
return {
__proto__: ary,
__iterator__: function () this.iterItems(),
__noSuchMethod__: function (meth, args) {
var res = array[meth].apply(null, [this.array].concat(args));
if (isArray(res))
return array(res);
if (isinstance(res, ["Iterator", "Generator"]))
return iter(res);
return res;
},
array: ary,
toString: function () this.array.toString(),
concat: function (...args) this.__noSuchMethod__("concat", args),
filter: function (...args) this.__noSuchMethod__("filter", args),
map: function (...args) this.__noSuchMethod__("map", args)
};
let self = this;
return new Proxy(ary, {
get: function array_get(target, prop) {
if (prop in array && callable(array[prop]))
return arrayWrap(array[prop].bind(array, target));
if (prop == "array")
return target;
let p = target[prop];
if (!/^\d+$/.test(prop) &&
prop != "toString" &&
prop != "toSource" &&
callable(p))
return arrayWrap(p);
return p;
}
});
}
}, {
/**