AsyncFile.open

OpenResult open(ref EventLoop loop, scope const(char)[] path, int flags) @trusted

Open a file asynchronously.

`loop`	Event loop to register with.
`path`	Path to the file to open.
`flags`	POSIX-like open flags (O_RDONLY, O_WRONLY, O_RDWR, O_CREAT, O_TRUNC, O_APPEND).

OpenResult.OK on success, or an error variant.