classAbstractProperties.ts(5,13): error TS1243: 'private' modifier cannot be used with 'abstract' modifier.
classAbstractProperties.ts(12,13): error TS1243: 'private' modifier cannot be used with 'abstract' modifier.


==== classAbstractProperties.ts (2 errors) ====
    abstract class A {
        abstract x : number;
        public abstract y : number;
        protected abstract z : number;
        private abstract w : number;
                ~~~~~~~~
!!! error TS1243: 'private' modifier cannot be used with 'abstract' modifier.
        
        abstract m: () => void; 
        
        abstract foo_x() : number;
        public abstract foo_y() : number;
        protected abstract foo_z() : number;
        private abstract foo_w() : number;
                ~~~~~~~~
!!! error TS1243: 'private' modifier cannot be used with 'abstract' modifier.
    }