clang/test/Modules/Inputs/merge-using-decls/a.h

   1 struct X {
   2   int v;
   3   typedef int t;
   4   void f(X);
   5 };
   6
   7 struct YA {
   8   int value;
   9   typedef int type;
  10 };
  11
  12 struct Z {
  13   void f(Z);
  14 };
  15
  16 template<typename T> struct C : X, T {
  17   using T::value;
  18   using typename T::type;
  19   using X::v;
  20   using typename X::t;
  21 };
  22
  23 template<typename T> struct D : X, T {
  24   using T::value;
  25   using typename T::type;
  26   using X::v;
  27   using typename X::t;
  28 };
  29
  30 template<typename T> struct E : X, T {
  31   using T::value;
  32   using typename T::type;
  33   using X::v;
  34   using typename X::t;
  35 };
  36
  37 template<typename T> struct F : X, T {
  38   using T::value;
  39   using typename T::type;
  40   using X::v;
  41   using typename X::t;
  42 };
  43
  44 // Force instantiation.
  45 typedef C<YA>::type I;
  46 typedef D<YA>::type I;
  47 typedef E<YA>::type I;
  48 typedef F<YA>::type I;
  49
  50 #if __cplusplus >= 201702L
  51 template<typename ...T> struct G : T... {
  52   using T::f...;
  53 };
  54 using Q = decltype(G<X, Z>());
  55 #endif