William D Clinger scripsit:
> The language described by the draft R6RS cannot be
> implemented by a pure interpreter (*). Lexical checking,
> macro expansion, syntax checking, bound-variable checking,
> and immutability checks are required before any part of a
> program can begin its execution.
Are there any pure interpreters of Scheme? AFAIK, all of them
insist on reading at least one top-level form before executing
anything, and all do at least some preprocessing on that form.
There are languages like APL and Basic that have been implemented
by pure interpreters.
--
John Cowan http://www.ccil.org/~cowan cowan_at_ccil.org
Be yourself. Especially do not feign a working knowledge of RDF where
no such knowledge exists. Neither be cynical about RELAX NG; for in
the face of all aridity and disenchantment in the world of markup,
James Clark is as perennial as the grass. --DeXiderata, Sean McGrath
Received on Sun Feb 25 2007 - 17:27:37 UTC