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digitalmars.D - Re: Another syntactic under-performer

reply ore-sama <spam here.lot> writes:
Bill Baxter Wrote:


 I've seen a few
 interesting proposals that wanted to use colons but which ran into
 troubles with ambiguity vs goto and switch labels.   But switch case
 labels are already inside a syntactically distinct structure, so it
 should be easy to change them to just about any syntax.



there was interesting proposal for if-style case statement, which gives real
structure to switch statement!
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=77141
Oct 14 2008
next sibling parent reply "Bill Baxter" <wbaxter gmail.com> writes:
On Tue, Oct 14, 2008 at 4:59 PM, ore-sama <spam here.lot> wrote:

 Bill Baxter Wrote:


 I've seen a few
 interesting proposals that wanted to use colons but which ran into
 troubles with ambiguity vs goto and switch labels.   But switch case
 labels are already inside a syntactically distinct structure, so it
 should be easy to change them to just about any syntax.



 there was interesting proposal for if-style case statement, which gives real
structure to switch statement!
 http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=77141



I saw the thread.   Like some others, I didn't really get the need for
that particular change.
I'd give it another look right now, but unfortunately links to that
web-news interface don't work right. :-(  That link goes to an
unrelated discussion.

--bb
Oct 14 2008
parent reply ore-sama <spam here.lot> writes:
Bill Baxter Wrote:


 http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=77141



 I saw the thread.   Like some others, I didn't really get the need for
 that particular change.
 I'd give it another look right now, but unfortunately links to that
 web-news interface don't work right. :-(  That link goes to an
 unrelated discussion.
 
 --bb



script has problem with art_group parameter, edit it manually to hold real
group name:
art_group=digitalmars.D
art_group=digitalmars.D.announce
art_group=digitalmars.D.learn
Oct 14 2008
parent ore-sama <spam here.lot> writes:
Bill Baxter Wrote:


 It's just a different syntax for the current switch.



as it was noted, current case is just a type of label. In this proposal case is
a scope statement like if.
Oct 14 2008
prev sibling next sibling parent "Bill Baxter" <wbaxter gmail.com> writes:
On Tue, Oct 14, 2008 at 5:19 PM, ore-sama <spam here.lot> wrote:

 Bill Baxter Wrote:


 http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=77141



 I saw the thread.   Like some others, I didn't really get the need for
 that particular change.
 I'd give it another look right now, but unfortunately links to that
 web-news interface don't work right. :-(  That link goes to an
 unrelated discussion.

 --bb



 script has problem with art_group parameter, edit it manually to hold real
group name:
 art_group=digitalmars.D
 art_group=digitalmars.D.announce
 art_group=digitalmars.D.learn



Oh wait.. that was the right post.  It was just #4 out of 4 points.
Sorry I just missed it.

--bb
Oct 14 2008
prev sibling next sibling parent "Bill Baxter" <wbaxter gmail.com> writes:
On Tue, Oct 14, 2008 at 5:25 PM, Bill Baxter <wbaxter gmail.com> wrote:

 On Tue, Oct 14, 2008 at 5:19 PM, ore-sama <spam here.lot> wrote:

 Bill Baxter Wrote:


 http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=77141



 I saw the thread.   Like some others, I didn't really get the need for
 that particular change.
 I'd give it another look right now, but unfortunately links to that
 web-news interface don't work right. :-(  That link goes to an
 unrelated discussion.

 --bb



 script has problem with art_group parameter, edit it manually to hold real
group name:
 art_group=digitalmars.D
 art_group=digitalmars.D.announce
 art_group=digitalmars.D.learn



 Oh wait.. that was the right post.  It was just #4 out of 4 points.
 Sorry I just missed it.



The proposal was this:

"""
4. Replace C-style switch with something modern and more D-like:

switch (x)
{
    case (0) foo();
    case (1)
    {
        bar();
        baz();
    }
    else throw new Exception("nope");
}
"""

The question is why?  Replacing syntax just to look "more modern" is
not a good justification for breaking everyone's code.

But if you have the goal of freeing up the colon for bigger and better
things, I suppose that doesn't seem like a bad syntax.   I don't think
it would kill the Duff's device, either.  It's just a different syntax
for the current switch.


Excuse me now.. while I "free up my colon for bigger and better things".

--bb
Oct 14 2008
prev sibling parent "Bill Baxter" <wbaxter gmail.com> writes:
On Tue, Oct 14, 2008 at 6:05 PM, ore-sama <spam here.lot> wrote:

 Bill Baxter Wrote:


 It's just a different syntax for the current switch.



 as it was noted, current case is just a type of label. In this proposal case
is a scope statement like if.



Ah, I see.  Well, it's really a different goal than this thread in
that case.  But very similar syntax could be used with current switch
semantics to help free up the colon.

--bb
Oct 14 2008