• Janice Caron (10/10) Nov 22 2007 foreach doesn't seem to know about invariant. Watch...
• Stewart Gordon (9/10) Nov 22 2007
• Ary Borenszweig (2/13) Nov 22 2007 And also: http://d.puremagic.com/issues/show_bug.cgi?id=1615
• Janice Caron (13/13) Nov 22 2007 It'll be interesting to see how we're supposed to overload that with

"Janice Caron" <caron800 googlemail.com> writes:

foreach doesn't seem to know about invariant. Watch...

    import std.stdio;

    void main()
    {
        string s = "hello";
        foreach(ref c;s) { c = '*'; }
        writefln(s);
    }

Prints
*****

"Stewart Gordon" <smjg_1998 yahoo.com> writes:

"Janice Caron" <caron800 googlemail.com> wrote in message 
news:mailman.113.1195747061.2338.digitalmars-d puremagic.com...
 foreach doesn't seem to know about invariant. Watch...

<snip>

Known bug.
http://d.puremagic.com/issues/show_bug.cgi?id=1322

Stewart.

-- 
My e-mail address is valid but not my primary mailbox.  Please keep replies 
on the 'group where everybody may benefit. 

Ary Borenszweig <ary esperanto.org.ar> writes:

Stewart Gordon wrote:
 "Janice Caron" <caron800 googlemail.com> wrote in message 
 news:mailman.113.1195747061.2338.digitalmars-d puremagic.com...
 foreach doesn't seem to know about invariant. Watch...

 
 <snip>
 
 Known bug.
 http://d.puremagic.com/issues/show_bug.cgi?id=1322
 
 Stewart.
 

And also: http://d.puremagic.com/issues/show_bug.cgi?id=1615

"Janice Caron" <caron800 googlemail.com> writes:

It'll be interesting to see how we're supposed to overload that with
opApply, taking const into account, in the next version of const. Do
we have to write the function twice? (Four times if you also have to
write Value-only versions).

const int opApply(int delegate(Key key, Value value) dg)
{
    /* whatever */
}

int opApply(int delegate(Key key, ref Value value) dg)
{
    /* whatever */
}

I don't think you can say "ref const(Value) value".