clang/test/PCH/cxx2a-requires-expr.cpp

   1 // RUN: %clang_cc1 -emit-pch -std=c++2a -o %t %s
   2 // RUN: %clang_cc1 -std=c++2a -x ast -ast-print %t | FileCheck %s
   3
   4 // RUN: %clang_cc1 -emit-pch -std=c++2a -fpch-instantiate-templates -o %t %s
   5 // RUN: %clang_cc1 -std=c++2a -x ast -ast-print %t | FileCheck %s
   6
   7 template<typename T>
   8 concept C = true;
   9
  10 template<typename T, typename U>
  11 concept C2 = true;
  12
  13 template<typename T>
  14 bool f() {
  15   // CHECK: requires (T t) { t++; { t++ } noexcept -> C; { t++ } -> C2<int>; typename T::a; requires T::val; requires C<typename T::val> || (C<typename T::val> || C<T>); };
  16   return requires (T t) {
  17     t++;
  18     { t++ } noexcept -> C;
  19     { t++ } -> C2<int>;
  20     typename T::a;
  21     requires T::val;
  22     requires C<typename T::val> || (C<typename T::val> || C<T>);
  23   };
  24 }
  25
  26 namespace trailing_requires_expression {
  27
  28 template <typename T> requires C<T> && C2<T, T>
  29 // CHECK: template <typename T> requires C<T> && C2<T, T> void g();
  30 void g();
  31
  32 template <typename T> requires C<T> || C2<T, T>
  33 // CHECK: template <typename T> requires C<T> || C2<T, T> constexpr int h = sizeof(T);
  34 constexpr int h = sizeof(T);
  35
  36 template <typename T> requires C<T>
  37 // CHECK:      template <typename T> requires C<T> class i {
  38 // CHECK-NEXT: };
  39 class i {};
  40
  41 }