text: // RUN: %clang_cc1 -std=c99 -E %s -o - | FileCheck --check-prefix=CHECK-PED-NONE %s
  // RUN: %clang_cc1 -std=c99 -pedantic-errors -E %s -o - | FileCheck --check-prefix=CHECK-PED-ERR %s
  
  // CHECK-PED-NONE: no_dummy_extension
  #if !__has_extension(dummy_extension)
  int no_dummy_extension();
  #endif
  
  // Arbitrary feature to test that has_extension is a superset of has_feature
  // CHECK-PED-NONE: attribute_overloadable
  #if __has_extension(attribute_overloadable)
  int attribute_overloadable();
  #endif
  
  // CHECK-PED-NONE: has_c_static_assert
  // CHECK-PED-ERR: no_c_static_assert
  #if __has_extension(c_static_assert)
  int has_c_static_assert();
  #else
  int no_c_static_assert();
  #endif
  
  // CHECK-PED-NONE: has_c_generic_selections
  // CHECK-PED-ERR: no_c_generic_selections
  #if __has_extension(c_generic_selections)
  int has_c_generic_selections();
  #else
  int no_c_generic_selections();
  #endif
  
  // CHECK-PED-NONE: has_c_alignas
  // CHECK-PED-ERR: no_c_alignas
  #if __has_extension(c_alignas)
  int has_c_alignas();
  #else
  int no_c_alignas();
  #endif
  
  // CHECK-PED-NONE: has_c_alignof
  // CHECK-PED-ERR: no_c_alignof
  #if __has_extension(c_alignof)
  int has_c_alignof();
  #else
  int no_c_alignof();
  #endif
  
  // Arbitrary feature to test that the extension name can be surrounded with
  // double underscores.
  // CHECK-PED-NONE: has_double_underscores
  #if __has_extension(__c_alignas__)
  int has_double_underscores();
  #endif
  