• Sean Reque <seanthenewt yahoo.com> Feb 18 2008
• "Craig Black" <craigblack2 cox.net> Feb 18 2008

Sean Reque <seanthenewt yahoo.com> writes:

 So why can't we have both (just as in C++):
 
 ========================
 const B b;  // b cannot be re-bind, and the object cannot be modified
 B const b;  // b can    be re-bind, but the object cannot be modified
 ========================


The saddest part of this is it actually worked this way at least up through
2.007. I compiled the following code in a 2.007 compiler and when it worked,
thought that everyone was crazy. Then I downloaded the 2.010 compiler and it
wouldn't compile. So it's not even a matter of it being a lot of work to make
it happen. I think everyone who is interested in having const work the older
way should make keep making themselves heard!

import std.stdio;

class C {
}

int main() {
	C c1 = new C();
	C c2 = new C();
	const(C) cc = c1;
	cc = c2; 		// compiles with 2.007, but not 2.010
	writeln("done!");
	return 0;
}

"Craig Black" <craigblack2 cox.net> writes:

"Sean Reque" <seanthenewt yahoo.com> wrote in message 
news:fpc5o0$2djh$1 digitalmars.com...
 So why can't we have both (just as in C++):

 ========================
 const B b;  // b cannot be re-bind, and the object cannot be modified
 B const b;  // b can    be re-bind, but the object cannot be modified
 ========================


 The saddest part of this is it actually worked this way at least up 
 through 2.007. I compiled the following code in a 2.007 compiler and when 
 it worked, thought that everyone was crazy. Then I downloaded the 2.010 
 compiler and it wouldn't compile. So it's not even a matter of it being a 
 lot of work to make it happen. I think everyone who is interested in 
 having const work the older way should make keep making themselves heard!

 import std.stdio;

 class C {
 }

 int main() {
 C c1 = new C();
 C c2 = new C();
 const(C) cc = c1;
 cc = c2; // compiles with 2.007, but not 2.010
 writeln("done!");
 return 0;
 }


When the latest const system became final, I was a little disappointed, but 
I was like "whatever".  This stuff has been debated way too much and frankly 
I'm sick of hearing about it.  Although I don't think it's going to change 
anything, I agree with you.  Without this feature (whatever the syntax used 
to express it) the const system is simply incomplete.

-Craig