__extend() failed to copy static getters

[qc00]

__extends() currently use the normal property access syntax to copy static properties which means it will copy the result of the getter to the sub-class instead of the getter itself.

It should do something like this if ES5 is supported:

var FUN_PROTO_NAMES = Object.getOwnPropertyNames(Function);

export function copyStatic(from: Function, to: Function) {
    Object.getOwnPropertyNames(from).forEach(p => {
        if (FUN_PROTO_NAMES.indexOf(p) === -1) {
            Object.defineProperty(to, p, Object.getOwnPropertyDescriptor(from, p));
        }
    });
}

[danquirk]

This has been an issue for a long time: http://typescript.codeplex.com/workitem/2324

I'm not sure our reasoning has changed since then.

[yortus]

Also discussed more recently here: #1520

[danquirk]

Thanks, don't know why I couldn't find that.