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digitalmars.D.bugs - [Issue 2983] New: Elaborate restricted variadic function does not compile

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2983

           Summary: Elaborate restricted variadic function does not
                    compile
           Product: D
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: andrei metalanguage.com


I suspect there are multiple reasons for which the code below does not compile.
It should, however, compile and run properly:

auto max(T...)(T a) 
      if (T.length == 2 
         && is(typeof(a[1] > a[0] ? a[1] : a[0]))
       || T.length > 2 
         && is(typeof(max(max(a[0], a[1]), a[2 .. $])))) {
   static if (T.length == 2) {
      return a[1] > a[0] ? a[1] : a[0];
   } else {
      return max(max(a[0], a[1]), a[2 .. $]);
   }
}

void main() {
    assert(max(4, 5) == 5);
    assert(max(3, 4, 5) == 5);
}

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May 15 2009
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2983


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clugdbug yahoo.com.au


--- Comment #1 from Don <clugdbug yahoo.com.au> 2009-10-14 00:09:03 PDT ---
This is failing because 'a' isn't available while in the constraint.

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Oct 14 2009
prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #2 from Andrei Alexandrescu <andrei metalanguage.com> 2009-10-14
07:01:38 PDT ---
(In reply to comment #1)
 This is failing because 'a' isn't available while in the constraint.

Exactly. The idea is that making the parameter names available would simplify writing template constraints a lot. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 14 2009
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=2983


Don <clugdbug yahoo.com.au> changed:

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


--- Comment #3 from Don <clugdbug yahoo.com.au> 2009-10-16 18:45:01 PDT ---
This is fixed by match to bug 3379.

*** This issue has been marked as a duplicate of issue 3379 ***

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