immutable

[Steven Schveighoffer]

On Wed, 26 Jan 2011 15:32:58 -0500, Robert <robert.welin at hotmail.com>  
wrote:

>
> Hello,
> I have just recently started programming in D (a very pleasant  
> experience so
> far I must say), but when experimenting with the the immutable attribute  
> I
> discovered that the following code does not generate a compile time nor a
> runtime error:
>
> //Decalare immutable string
> immutable char[] buf = "hello";
>
> //Print the value of buf
> writefln("buf = %s",buf);
>
> //Change buf by using standard input
> stdin.readln(buf);
>
> //Print buf again
> writefln("buf = %s",buf);
>
>
> This is a bit confusing to be because I had assumed that immutable data  
> really
> would be immutable (without casting). Why does the code above work?
>

It shouldn't.  I don't know where the bug is.  Please file a bug with a  
complete program (with a main() function) here:  
http://d.puremagic.com/issues/enter_bug.cgi

BTW, this has a segfault in Linux, so it's definitely trying to overwrite  
immutable data.

-Steve