clang/test/CXX/drs/dr8xx.cpp

   1 // RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
   2 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   3 // RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   4 // RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   5 // RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   6 // RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   7 // RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
   8
   9 // expected-no-diagnostics
  10
  11 namespace dr873 { // dr873: yes
  12 #if __cplusplus >= 201103L
  13 template <typename T> void f(T &&);
  14 template <> void f(int &) {}  // #1
  15 template <> void f(int &&) {} // #2
  16 void g(int i) {
  17   f(i); // calls f<int&>(int&), i.e., #1
  18 #pragma clang __debug dump f(i)
  19   //      CHECK: CallExpr {{.*}}
  20   // CHECK-NEXT: |-ImplicitCastExpr {{.*}}
  21   // CHECK-NEXT: | `-DeclRefExpr {{.*}} 'f' 'void (int &)' {{.*}}
  22
  23   f(0); // calls f<int>(int&&), i.e., #2
  24 #pragma clang __debug dump f(0)
  25   //      CHECK: CallExpr {{.*}}
  26   // CHECK-NEXT: |-ImplicitCastExpr {{.*}}
  27   // CHECK-NEXT: | `-DeclRefExpr {{.*}} 'f' 'void (int &&)' {{.*}}
  28 }
  29 #endif
  30 } // namespace dr873