@:generic map copy

Main.hx

class Main {
	
	function new() { }
	
	static function main() {
		var intMap = [1 => "foo", 2 => "bar"];
		var stringMap = ["foo" => 1, "bar" => 2];
		var m1 = new Main();
		var m2 = new Main();
		var objMap = [m1 => "foo", m2 => "bar"];
		
		var intMapCopy = copyMap(intMap);
		var stringMapCopy = copyMap(stringMap);
		var objMapCopy = copyMap(objMap);
		
		eq(intMap[1], intMapCopy[1]);
		eq(intMap[2], intMapCopy[2]);
		eq(stringMap["foo"], stringMapCopy["foo"]);
		eq(stringMap["bar"], stringMapCopy["bar"]);
		eq(objMap[m1], objMapCopy[m1]);
		eq(objMap[m2], objMapCopy[m2]);
	}
	
	@:generic static function copyMap<K, V>(m:Map<K, V>) {
		var ret = new Map();
		for (k in m.keys()) {
			ret[k] = m[k];
		}
		return ret;
	}
	
	static function eq<T>(expected:T, actual:T, ?p:haxe.PosInfos) {
		if (expected != actual) {
			haxe.Log.trace('$actual should be $expected', p);
		}
	}
}