BCPL compiler with GCC

[Andrew Haley <aph at redhat dot com>]

Tom Crick writes:
 > Hello,
 > 
 > I'm trying to write a compiler for BCPL and have been investigating writing
 > a new frontend to GCC.
 > 
 > Do you know if anyone has written a parser and tree rep. for BCPL in GCC?
 > Are there some nasty traps and pitfalls ahead? Obviously there are some nice
 > little quirks in BCPL ('valof()' and general scoping issues), but
 > semantically it's not much different from C.

Addresses are always word addresses, aren't they?  I suppose you'd end
up with something like

!B  mapping onto  *(word *)(b * sizeof word)

 > Also, with upcoming changes to GCC, would it be a good idea to convert to
 > GENERIC at the end?

Yes.  In fact, you could generate generic trees during parsing.

But you could convert BCPL to C instead.

Andrew.