[Issue 1604] New: Non-final method on final struct is too restrictive

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1604

           Summary: Non-final method on final struct is too restrictive
           Product: D
           Version: 2.007
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: andrei at metalanguage.com


Currently, code like:

foreach (e; array)
{
  e.function();
}

fails with the message "Error: cannot call mutable method on final struct" if
function is not const. But function can modify data indirectly referenced by e,
so the restriction is not justified. 

Suggested fix: lift that restriction for now. In the future, if function's
source is available, issue an error if and only if function does not use the
object as an rvalue.


--