i learnt about them from this post and the library it refers to: http://spin.atomicobject.com/2014/10/08/c99-api-designated-initializer/ http://spin.atomicobjec

i learnt about them from this post and the library it refers to: http://spin.atomicobject.com/2014/10/08/c99-api-designated-initializer/ http://spin.atomicobject.com/2014/10/08/c99-api-designated-i... good read, both the post and the socket99 code.