I have a suggestion: let's include in D a select statement with non-static conditions:

seclect ()
{
case a < b:
    ....
    break;
case sin(k) < cos(b):
    ....
    break;
case str == "12345":
    ....
    break;
case default:
    ....
    break;
}

which is equivalent to if - else if - else block, but in some cases more compact and understandable.

I would not mind if instead of select another keyword would be used and
maybe case is not needed.
Regards.

Lev Elbert wrote:

> I have a suggestion: let's include in D a select statement with non-static
> conditions:
> 
> seclect ()
> {
> case a < b:
>     ....
>     break;
<snip>
> which is equivalent to if - else if - else block, but in some cases more
> compact and understandable.

Not quite sure how that would be.

if (a < b) {
	....
} else if (sin(k) < cos(b)) {
	....
} else if (str == "12345") {
	....
} else {
	....
}

That's compact.  I'd have no trouble understanding it.  It's even cleanly structured compared to switch.

Indeed, I proposed a cleanly structured switch syntax a while back....
http://www.digitalmars.com/drn-bin/wwwnews?D/22722

Stewart.

-- 
My e-mail is valid but not my primary mailbox, aside from its being the unfortunate victim of intensive mail-bombing at the moment.  Please keep replies on the 'group where everyone may benefit.

Lev Elbert wrote:
> I have a suggestion: let's include in D a select statement with non-static
> conditions:
> 
> which is equivalent to if - else if - else block, but in some cases more
> compact and understandable.
> 
> I would not mind if instead of select another keyword would be used and
> maybe case is not needed.
> Regards.

There's not much point in this because it doesn't really affect what D can express, nor does it save a huge amount of effort when one is trying to express any particular idea.

 -- andy

In article <c8fk6j$1s53$1@digitaldaemon.com>, Lev Elbert says...
>
>seclect ()
>{
>case a < b:
>    ....
>    break;
>case sin(k) < cos(b):
>    ....
>    break;
> (...)
>
>which is equivalent to if - else if - else block, but in some cases more compact and understandable.


or just add 'elif' for lazy ppl :P

>or just add 'elif' for lazy ppl :P

Lazy is right, I never saw any need for elif;  "else if"  works just fine, is easier to read, etc. etc. etc...

Juan C wrote:

>>or just add 'elif' for lazy ppl :P
> 
> 
> Lazy is right, I never saw any need for elif;  "else if"  works just fine, is
> easier to read, etc. etc. etc...
> 
> 

yeah, but elif is 4 letters, else if is 6 letters and a space, that's upto 75% more, so adding elif would mean an increase in productivity of almost 43%

:-)

roel

>yeah, but elif is 4 letters, else if is 6 letters and a space, that's upto 75% more, so adding elif would mean an increase in productivity of almost 43%

Well, no, a disk storage (and network transfer) savings of 43%. And I've only got 75GB of free space on my disk! I'd better watch out.

One of my Perl books around here states (jokingly I hope) that Perl doesn't have
"elif" because it's "file" spelled backward. Who am I to argue with that?  (Oy!)

More seriously: if "elif" is added simply to take the place of "else if", I would hope that "else if" becomes illegal. On the other hand you can write "elif" and have a text replacement utility replace it with "else if".

Juan C wrote:

>>yeah, but elif is 4 letters, else if is 6 letters and a space, that's upto 75% more, so adding elif would mean an increase in productivity of almost 43%
> 
> 
> Well, no, a disk storage (and network transfer) savings of 43%. And I've only
> got 75GB of free space on my disk! I'd better watch out.
> 
> One of my Perl books around here states (jokingly I hope) that Perl doesn't have
> "elif" because it's "file" spelled backward. Who am I to argue with that?  (Oy!)
> 
> More seriously: if "elif" is added simply to take the place of "else if", I
> would hope that "else if" becomes illegal. On the other hand you can write
> "elif" and have a text replacement utility replace it with "else if".
> 
> 

this could be "the" ultimate reason to add a preprocessor to D,
replace all "elif" with "else if" <g>

bye,
roel

>this could be "the" ultimate reason to add a preprocessor to D, replace all "elif" with "else if" <g>

Not a full-blown preprocessor, just a simple one. Or allow "C preprocessor" output to be piped into the compiler, of course that's up to the compiler writer, not the language.

If there were several competing D compilers (and there will be) features like
this could be deciding factors in choosing one. (Can you say "non-portable"?)

Barring that, the community ought to agree on one text replacement utility to use. And if that were the C preprocessor it would be abused I'm sure.

Oh, I keep forgetting to see if I could use HTML for text replacement!

Roel Mathys wrote:

> this could be "the" ultimate reason to add a preprocessor to D,
> replace all "elif" with "else if" <g>

Yeah, Walter, let's see your fancy mixins do this! ;)

James McComb