http://d.puremagic.com/issues/show_bug.cgi?id=1780

           Summary: Type tuple deduction failure for class templates
           Product: D
           Version: 2.009
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: paul_m_doc@hotmail.com


Type arguments of class templates should be deducible with the following:

template Tuple(Ts ...) { alias Ts Tuple; }

template Decode( T )                            { alias Tuple!() Types; }
template Decode( T : TT!(Us), alias TT, Us... ) { alias Us Types; }

struct S2(T1, T2) {}

// should extract tuple (bool,short) but matches the first specialisation

alias Decode!( S2!(bool,short) ).Types SQ2;  // --> SQ2 is empty tuple!

-----------------

Issue #1779 tries to workaround this failure by decoding a fixed number of arguments but even that crashes the compiler.


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http://d.puremagic.com/issues/show_bug.cgi?id=1780


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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull


--- Comment #1 from Kenji Hara <k.hara.pg@gmail.com> 2012-05-20 09:51:07 PDT ---
https://github.com/D-Programming-Language/dmd/pull/958

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--- Comment #2 from github-bugzilla@puremagic.com 2012-05-20 12:48:18 PDT ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/71785b48ea16a47e62654f1134cff2eac372f7dc fix Issue 1780 - Type tuple deduction failure for class templates

https://github.com/D-Programming-Language/dmd/commit/ed68238cd1e5a7aec454840ee11e04580f974855 Merge pull request #958 from 9rnsr/fix_tided

Issue 1780 & 3608 & 8125 - Fix TypeInstance deduction problems

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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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