Re: Number of compiler passes

George Neuner wrote:
(snip)


> In practice, I think partial qualification is only an issue for
> languages with latent or no typing.
(snip)


> As for shadowing definitions, I would simply go with the inner one. I
> can see some minor utility to searching until you find a definition
> that works, but I think it would make the language very confusing to
> allow simultaneous access to multiple types of the same name.


Yes, I believe that is what PL/I does. (I believe that partial
qualification came from COBOL, but I don't know about that at all.)


It came up once when someone discovered that it would use
a partially qualified inner structure over a fully qualified
structure at an outer level.


It is a compilation error if it is ambiguous at the same
level, but not at different levels.


DCL B FIXED BIN(31);
BEGIN;
        DCL 1 A, 2 B FLOAT(6);
        B=3;
        PUT LIST(A.B);
END;


-- glen

Return to the comp.compilers page.
Search the comp.compilers archives again.