clang/test/PCH/decl-attrs.cpp

   1 // RUN: %clang_cc1 -std=c++20 -emit-pch -o %t.a %s
   2 // RUN: %clang_cc1 -std=c++20 -include-pch %t.a %s -verify
   3
   4 #ifndef HEADER
   5 #define HEADER
   6
   7 namespace preferred_name {
   8   template<typename T> struct X;
   9   using Y = X<int>;
  10   using Z = X<float>;
  11   template<typename T> struct [[using clang: preferred_name(Y), preferred_name(Z)]] X {};
  12   Y y;
  13 }
  14
  15 namespace aligned {
  16   // PR48434: ensure attributes don't introduce deserialization cycles.
  17   template<typename T> struct X1;
  18   using Y1 = X1<int>;
  19   template<typename T> struct alignas(Y1*) X1 {};
  20   Y1 y1;
  21
  22   template<typename T> struct X2;
  23   using Y2 = X2<int>;
  24   template<typename T> struct alignas(Y2*) X2 {};
  25 }
  26
  27 #else
  28
  29 namespace preferred_name {
  30   Z z;
  31
  32   template<typename T> T forget(T t) { return t; }
  33   void f() {
  34     forget(y).foo(); // expected-error {{no member named 'foo' in 'preferred_name::Y'}}
  35     forget(z).foo(); // expected-error {{no member named 'foo' in 'preferred_name::Z'}}
  36   }
  37 }
  38
  39 namespace aligned {
  40   extern Y1 y1;
  41   extern Y2 y2;
  42   static_assert(alignof(Y1) == alignof(Y1*), "");
  43   static_assert(alignof(Y2) == alignof(Y2*), "");
  44 }
  45
  46 #endif