XPOP: a meta-language without metaphysics

@inproceedings{Halpern1964XPOPAM,
  title={XPOP: a meta-language without metaphysics},
  author={Mark I. Halpern},
  booktitle={AFIPS '64 (Fall, part I)},
  year={1964}
}
The XPOP programming system is a straightforward and practical means of implementing on a computer a great variety of languages---in other words, of writing a variety of compilers. The class of languages it can handle is not easy to characterize by syntactic form, since the system permits syntax specification to be varied freely from statement to statement in a program being scanned; the permitted class includes the best-known programming languages, as well as something closely approaching… CONTINUE READING