gcc-4.9/gcc/testsuite/g++.dg/cpp1y/lambda-generic.C


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// Generic lambda test from N3690 5.1.2.5
// { dg-do compile { target c++1y } }

#include <iostream>

int main()
{
  auto glambda = [](auto a, auto&& b) { return a < b; };
  bool b = glambda(3, 3.14); // OK
  auto vglambda = [](auto printer) {
    return [=](auto&& ... ts) { // OK: ts is a function parameter pack
      printer(std::forward<decltype(ts)>(ts)...);
      return [=]() {
        printer(ts ...);
      };
    };
  };
  auto p = vglambda( [](auto v1, auto v2, auto v3)
    { std::cout << v1 << v2 << v3; } );
  auto q = p(1, 'a', 3.14); // OK: outputs 1a3.14
  q(); // OK: outputs 1a3.14
}