Re: compiler generators.

moss@cs.umass.edu (Eliot Moss)
3 Oct 90 13:45:21 GMT

          From comp.compilers
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Newsgroups: comp.compilers
From: moss@cs.umass.edu (Eliot Moss)
In-Reply-To: mike@thor.acc.stolaf.edu's message of 1 Oct 90 04:43:28 GMT
Keywords: parse, code
Organization: Dept of Comp and Info Sci, Univ of Mass (Amherst)
References: <90255.105510VMDOS@tecmtyvm.mty.itesm.mx> <1852@tuvie> <1990Oct1.044328.8051@acc.stolaf.edu>
Date: 3 Oct 90 13:45:21 GMT

I agree with Mike's comments, for the most part. We are doing the Modula-3
compiler based on gcc, and we did need a new parser and type checker, but can
use most of the existing tree stuff. Since Modula-3 has constructs not
expressible in C, a few modest extensions were required to the tree format,
but not many. We will also need some back end extensions. These are required
mostly for exception handling and garbage collection support. Some of it will
be in gcc 2.0, since the extended C for that includes nested functions (which
Pascal and Modula-* need for implementing their nested procedures) and
exception handling (though Stallman may implement the exception handling for C
differently from the way we have done for Modula-3). Further, the extensions
we have made will not disturb the C compiler, so they will (after appropriate
blessing by Stallman and associates) be incorporated into the base compiler
(the .h files, etc.). Hope this clarifies the effort involved in getting new
languages into the gcc framework .... Eliot
--


J. Eliot B. Moss, Assistant Professor
Department of Computer and Information Science
Lederle Graduate Research Center
University of Massachusetts
Amherst, MA 01003
(413) 545-4206; Moss@cs.umass.edu
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