• Lio <Lio_member pathlink.com> Oct 07 2003
• "Philippe Mori" <philippe_mori hotmail.com> Oct 07 2003
• "Walter" <walter digitalmars.com> Oct 07 2003

Lio <Lio_member pathlink.com> writes:

I'm actually very fond of 'const' in C++. You can give (a pointer to) an object
to anybody for reading only. I've looked through the docs but can't seem to find
anything about 'const' in D. Did I miss it? Or was it removed, if so, why?

L.

"Philippe Mori" <philippe_mori hotmail.com> writes:

 I'm actually very fond of 'const' in C++. You can give (a pointer to) an


 to anybody for reading only. I've looked through the docs but can't seem


 anything about 'const' in D. Did I miss it? Or was it removed, if so, why?

 L.


Currently, const is used only as a stirage modifier and not a type modifier.

IMHO, D give with one hand and take away with the other one. We have better
"design by contract" but we miss full constness support... which also help
to
prevent errors.

I think we should support constness at least on final objects (say a Point`
a Rect or String class for example). In fact, I would say that we should
support
it on any object (except possibly for interface --- since they might
interact
with COM --- and in that case, QueryInterface would not be const so
having interface won't break the constness of an object)

Philippe

"Walter" <walter digitalmars.com> writes:

"Lio" <Lio_member pathlink.com> wrote in message
news:blu0np$2m7n$1 digitaldaemon.com...
 I'm actually very fond of 'const' in C++. You can give (a pointer to) an


 to anybody for reading only. I've looked through the docs but can't seem


 anything about 'const' in D. Did I miss it? Or was it removed, if so, why?


'const' exists in D as a storage class, not a type modifier (as in C++).
There have been numerous long threads here discussing the pros and cons of
it.