clang-tools-extra/test/clang-reorder-fields/FieldDependencyWarningDerived.cpp

   1 // RUN: clang-reorder-fields -record-name bar::Derived -fields-order z,y %s -- 2>&1 | FileCheck --check-prefix=CHECK-MESSAGES %s
   2 // FIXME: clang-reorder-fields should provide -verify mode to make writing these checks
   3 // easier and more accurate, for now we follow clang-tidy's approach.
   4
   5 namespace bar {
   6 struct Base {
   7   int x;
   8   int p;
   9 };
  10
  11 class Derived : public Base {
  12 public:
  13   Derived(long ny);
  14   Derived(char nz);
  15 private:
  16   long y;
  17   char z;
  18 };
  19
  20 Derived::Derived(long ny) :
  21   Base(),
  22   y(ny),
  23   z(static_cast<char>(y))
  24   // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: reordering field y after z makes y uninitialized when used in init expression
  25 {}
  26
  27 Derived::Derived(char nz) :
  28   Base(),
  29   y(nz),
  30   // Check that base class fields are correctly ignored in reordering checks
  31   // x has field index 1 and so would improperly warn if this wasn't the case since the command for this file swaps field indexes 1 and 2
  32   z(x)
  33   // CHECK-MESSAGES-NOT: :[[@LINE-1]]:3: warning: reordering field x after z makes x uninitialized when used in init expression
  34 {}
  35
  36 } // namespace bar