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From: "i.nixman at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/51979] New: variadic templates + lambda capture list = error
Date: Tue, 24 Jan 2012 11:15:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51979

             Bug #: 51979
           Summary: variadic templates + lambda capture list = error
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: i.nixman@gmail.com


The following code:
template <class... Args> void foo(Args... args) {}
template <class... Args> void bar(Args... args) {
   auto lambda = [=, args...]() {
      foo(args...);
   };
}

produce this error:
>g++ -std=c++0x lambd.cpp -olambd
lambd.cpp: In function 'void bar(Args ...)':
lambd.cpp:3:25: error: expected ',' before '...' token
lambd.cpp:3:25: error: expected identifier before '...' token
lambd.cpp:3:28: error: parameter packs not expanded with '...':
lambd.cpp:3:28: note:         'args'
lambd.cpp: In lambda function:
lambd.cpp:4:13: error: expansion pattern '((const bar(Args
...)::<lambda()>*)this)->bar(Args ...)::<lambda()>::args' contains no argument
packs

example from c++ draft 5.1.2.23:
template<class... Args>
void f(Args... args) {
   auto lm = [&, args...] { return g(args...); };
   lm();
}