gcc/testsuite/g++.dg/warn/Wconditionally-supported-1.C

   1 // { dg-options "-Wconditionally-supported" }
   2
   3 // DR 195 was about allowing conversions between function and object
   4 // pointers under some circumstances.  The issue got resolved for C++11,
   5 // which, in 5.2.10 p8 says that: "Converting a function pointer to an
   6 // object pointer type or vice versa is conditionally-supported."
   7
   8 // This checks we warn with -Wconditionally-supported.
   9
  10 typedef void (*PF)(void);
  11 typedef void *PV;
  12 typedef int *PO;
  13
  14 void foo ()
  15 {
  16   PF pf;
  17   PV pv;
  18   PO po;
  19
  20   pf = reinterpret_cast <PF>(pv); // { dg-warning "conditionally-supported" }
  21   pv = reinterpret_cast <PV>(pf); // { dg-warning "conditionally-supported" }
  22
  23   pf = reinterpret_cast <PF>(po); // { dg-warning "conditionally-supported" }
  24   po = reinterpret_cast <PO>(pf); // { dg-warning "conditionally-supported" }
  25 }