Bug 11812 – Associative array .keys needs 'this' at compile time

DMD compiler 2.064, Windows 7 64 bit ``` enum myaa = ["foo": "bar"]; template MyTemplate(alias Arr) { enum MyTemplate = Arr.length; } void main() { // Fails auto a = MyTemplate!(myaa.keys); } version(none): void main() { // Works enum keys = myaa.keys; auto a = MyTemplate!keys; } ``` Passing an AA's .keys to a template directly fails, but making `keys` a separate enum allows them to be passed. Error: aabug.d(5): Error: need 'this' for 'keys' of type 'pure nothrow @property @system string[]()' aabug.d(10): Error: template instance aabug.MyTemplate!(keys) error instantiating

This code compiles successfully in git HEAD (2.081). Closing as fixed.