+++ /dev/null
-// g++ 1.37.1 bug 900428_01
-
-// g++ fails to issue error messages for cases where an incomplete type
-// object must be evaluated if the value of such an evaluation is not
-// actually used in the given context.
-
-// In the case where such an object is volatile, it is obvious that this
-// could be a problem, however I believe that errors should be issued
-// for such cases regardless of whether or not such values are volatile
-// because the abstract semantics seem to require the evaluation of such
-// values whether they are volatile or not.
-
-// [expr.static.cast/4, stmt.expr/1, expr.comma/1] show that expressions do
-// not under go lvalue to rvalue decay, unless the value is actually used.
-// This can be surprising when the object is volatile. We interpret a
-// dereference of pointer to volatile to be a read.
-
-// keywords: incomplete types, evaluation, volatile qualifier
-// Build don't link:
-
-int *ip_fn ();
-int &ir_fn ();
-volatile int *vip_fn ();
-volatile int &vir_fn ();
-
-void int_test (int i, int *p, volatile int *vp, int &r, volatile int &vr)
-{
- int j;
- volatile int vj;
-
- *p; // ok, no warning
- (void)*p; // ok, no warning
- (void)(i ? j : *p); // ok, no warning
- (void)(i ? *p : j); // ok, no warning
- (void)((void)1, *p); // ok, no warning
-
- *vp; // ok, no warning
- (void)*vp; // ok, no warning
- (void)(i ? vj : *vp); // ok, no warning
- (void)(i ? *vp : vj); // ok, no warning
- (void)((void)1, *vp); // ok, no warning
-
- r; // ok, no warning
- (void)r; // ok, no warning
- (void)(i ? j : r); // ok, no warning
- (void)(i ? r : j); // ok, no warning
- (void)((void)1, r); // ok, no warning
-
- vr; // WARNING - reference not accessed
- (void)vr; // WARNING - reference not accessed
- (void)(i ? vj : vr); // WARNING - reference not accessed
- (void)(i ? vr : vj); // WARNING - reference not accessed
- (void)((void)1, vr); // WARNING - reference not accessed
-
- *ip_fn (); // ok, no warning
- *vip_fn (); // ok, no warning
- ir_fn (); // ok, no warning
- vir_fn (); // WARNING - reference not accessed
-}
-
-struct S;
-S *sp_fn ();
-S &sr_fn ();
-volatile S *vsp_fn ();
-volatile S &vsr_fn ();
-
-void incomplete_test (int i, S *p, volatile S *vp, S &r, volatile S &vr)
-{
- extern S j;
- extern volatile S vj;
-
- *p; // ok, no warning
- (void)*p; // ok, no warning
- (void)(i ? j : *p); // ok, no warning
- (void)(i ? *p : j); // ok, no warning
- (void)((void)1, *p); // ok, no warning
-
- *vp; // WARNING - incomplete not accessed
- (void)*vp; // WARNING - incomplete not accessed
- (void)(i ? vj : *vp); // WARNING - incomplete not accessed
- (void)(i ? *vp : vj); // WARNING - incomplete not accessed
- (void)((void)1, *vp); // WARNING - incomplete not accessed
-
- r; // ok, no warning
- (void)r; // ok, no warning
- (void)(i ? j : r); // ok, no warning
- (void)(i ? r : j); // ok, no warning
- (void)((void)1, r); // ok, no warning
-
- vr; // WARNING - reference not accessed
- (void)vr; // WARNING - reference not accessed
- (void)(i ? vj : vr); // WARNING - reference not accessed
- (void)(i ? vr : vj); // WARNING - reference not accessed
- (void)((void)1, vr); // WARNING - reference not accessed
-
- *sp_fn (); // ok, no warning
- *vsp_fn (); // WARNING - incomplete not accessed
- sr_fn (); // ok, no warning
- vsr_fn (); // WARNING - reference not accessed
-}
-
-struct T {int m;};
-T *tp_fn ();
-T &tr_fn ();
-volatile T *vtp_fn ();
-volatile T &vtr_fn ();
-
-void complete_test (int i, T *p, volatile T *vp, T &r, volatile T &vr)
-{
- T j;
- volatile T vj;
-
- *p; // ok, no warning
- (void)*p; // ok, no warning
- (void)(i ? j : *p); // ok, no warning
- (void)(i ? *p : j); // ok, no warning
- (void)((void)1, *p); // ok, no warning
-
- *vp; // ok, no warning
- (void)*vp; // ok, no warning
- (void)(i ? vj : *vp); // ok, no warning
- (void)(i ? *vp : vj); // ok, no warning
- (void)((void)1, *vp); // ok, no warning
-
- r; // ok, no warning
- (void)r; // ok, no warning
- (void)(i ? j : r); // ok, no warning
- (void)(i ? r : j); // ok, no warning
- (void)((void)1, r); // ok, no warning
-
- vr; // WARNING - reference not accessed
- (void)vr; // WARNING - reference not accessed
- (void)(i ? vj : vr); // WARNING - reference not accessed
- (void)(i ? vr : vj); // WARNING - reference not accessed
- (void)((void)1, vr); // WARNING - reference not accessed
-
- *tp_fn (); // ok, no warning
- *vtp_fn (); // ok, no warning
- tr_fn (); // ok, no warning
- vtr_fn (); // ok, no warningWARNING - reference not accessed
-}
-
-void extern_test ()
-{
- extern S es;
- extern volatile S ves;
- extern T et;
- extern volatile T vet;
-
- extern S &esr;
- extern volatile S &vesr;
- extern T &etr;
- extern volatile T &vetr;
-
- es; // ok, no warning
- ves; // WARNING - incomplete not accessed
- et; // ok, no warning
- vet; // ok, no warning
-
- esr; // ok, no warning
- vesr; // WARNING - incomplete not accessed
- etr; // ok, no warning
- vetr; // WARNING - reference not accessed
-}
projects / msp430-gcc.git / blobdiff