🚀 go-pugleaf

> In article <MATT.95Sep14102849@physics10.Berkeley.EDU>,
  "Eugene Radchenko" <eugene@qsar.chem.msu.su> writes:

> |> I would like to hear the opinions on the following problem:
> |> whether it is possible/worthwhile to introduce the analog of Pascal 'with'
> |> statement into C++ ?

> |> Suppose you have the following declarations:
> |>   type tpair = object
> |>          m,n: integer;
> |>          end;
> |>   var  pairs : array[1..10] of tpair;
> |> then you can write, for instance:
> |>   for i = 1 to 10 do
> |>     with pairs[i] do
> |>       m = n;
> |> instead of
> |>   for i = 1 to 10
> |>     pairs[i].m = pairs[i].n;

In article <fjh-950915-234944@cs.mu.oz.au>, moser@bnr.ca (Lionel Moser) writes:
> ... can be a disaster in large software systems.

Agreed.  Note that in Modula-3, for about this reason, "with" was changed
to bind to a name, as in (using example above):

> |>   for i = 1 to 10 do
> |>     with p = pairs[i] do
> |>       p.m = p.n;
> |>   end end

This gives you most of the conciseness, with none of the problems.
Furthermore, you can get this effect in C++ with references, as in:

for (i = 1; i <= 10; i++) {
  tpair & p = pairs[i];
  p.m = p.n;
}

Modula-3 doesn't require a type, but C++ doesn't require the
do, with, do, end, end.  This is not one of the interesting differences
between the two languages.

speaking for myself,
David Chase
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