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digitalmars.D.bugs - [Issue 1906] New: foreach cannot use index with large arrays

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1906

           Summary: foreach cannot use index with large arrays
           Product: D
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: jlquinn optonline.net


In D, array length is specified to be size_t, which allows for arrays up to the
size of memory.  However, the indexing form of foreach only permits an int or
uint as the index variable.  This will likely result in a silent bug used on an
array w/ more than 4G elements in a 64 bit environment.  For example:

char[] x;
x.length = 0x2_0000_0000L;
// fill the array
foreach (int i, char c; x)
  do_something(i, c);

foreach should be able to support a size_t in the index variable location.


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Mar 11 2008
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1906





------- Comment #1 from jlquinn optonline.net  2008-03-11 07:25 -------
I put this bug against DMD, but it's really a language definition issue.  It
might make sense to provide a separate component to separate issues with the
language spec from those with the compiler implementation.


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Mar 11 2008
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1906


kamm-removethis incasoftware.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |spec, wrong-code




------- Comment #2 from kamm-removethis incasoftware.de  2008-03-11 10:22
-------
I think language specification issues are usually filed against dmd and marked
with the 'spec' keyword.


-- 
Mar 11 2008
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1906


bugzilla digitalmars.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




------- Comment #3 from bugzilla digitalmars.com  2008-05-11 04:14 -------
Fixed dmd 1.029 and 2.013


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May 11 2008