http://d.puremagic.com/issues/show_bug.cgi?id=8064

           Summary: return reference semantics not obeyed on delegates?
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: gasper.azman@gmail.com


--- Comment #0 from Gašper Ažman <gasper.azman@gmail.com> 2012-05-08 03:12:02 PDT ---
I feel this is best explained with a testcase:
This is the error DMD gives:
test.d(21): Error: arryacc(3LU) is not an lvalue
code: #####

class A {
   private size_t size = 5;
   auto newArrayAccessor(T)() {
      T[] a = new T[size];
      ref T accessor(size_t i) {
          return a[i];
      }
      return &accessor;
   }
}

void main() {
   uint[5] arry;
   ref uint acc(size_t i) {
       return arry[i];
   }
   acc(3) = 5; // works

   auto a = new A;
   auto arryacc = a.newArrayAccessor!(uint)();
   arryacc(3) = 5; // doesn't work. What gives?
}

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--- Comment #1 from Gašper Ažman <gasper.azman@gmail.com> 2012-05-08 03:27:13 PDT ---
Simplified testcase (by q66):
void main() {
   uint[5] arry;
   ref uint acc(size_t i) {
       return arry[i];
   }
   auto arryacc = &acc;
   arryacc(3) = 5; // same error
}

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Kenji Hara <k.hara.pg@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull, rejects-valid


--- Comment #2 from Kenji Hara <k.hara.pg@gmail.com> 2012-05-08 04:57:01 PDT ---
https://github.com/D-Programming-Language/dmd/pull/933

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--- Comment #3 from github-bugzilla@puremagic.com 2012-05-10 20:00:23 PDT ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/5a9b927ae2501aac795c03d1cd6be79188e1e197 fix Issue 8064 - return reference semantics not obeyed on delegates?

https://github.com/D-Programming-Language/dmd/commit/813a0216b2a205fb06bd8d02d7c667317c7b5ce4 Merge pull request #933 from 9rnsr/fix8064

Issue 8064 - return reference semantics not obeyed on delegates?

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla@digitalmars.com
         Resolution|                            |FIXED


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