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      1 // { dg-do run  }
      2 // { dg-options "-w" }
      3 // Copyright (C) 1999, 2000 Free Software Foundation, Inc.
      4 // Contributed by Nathan Sidwell 29 Aug 1999 <nathan (at) acm.org>
      5 
      6 // We cannot catch an ambiguous base class.
      7 // -- public, << private, == virtual
      8 
      9 // D==B--A
     10 // +==C--A
     11 
     12 
     13 struct A { int m; };
     14 struct B : A { int m; };
     15 struct C : A { int m; };
     16 struct D : virtual B, virtual C { int m; };
     17 
     18 
     19 void fna(A *obj) { throw obj; }
     20 void fnb(B *obj) { throw obj; }
     21 void fnc(C *obj) { throw obj; }
     22 void fnd(D *obj) { throw obj; }
     23 
     24 extern "C" void abort();
     25 
     26 void check(D *d)
     27 {
     28   int caught;
     29 
     30   // try with whole object
     31   caught = 0;
     32   try { fnd(d); }
     33   catch(A *p) { abort(); } // A is ambiguous
     34   catch(D *p) { caught = 1; if (p != d) abort();}
     35   catch(...) { abort(); }
     36   if (!caught) abort();
     37 
     38   caught = 0;
     39   try { fnd(d); }
     40   catch(A *p) { abort(); } // A is ambiguous
     41   catch(B *p) { caught = 1; if (p != d) abort();}
     42   catch(...) { abort(); }
     43   if (!caught) abort();
     44 
     45   caught = 0;
     46   try { fnd(d); }
     47   catch(A *p) { abort(); } // A is ambiguous
     48   catch(C *p) { caught = 1; if (p != d) abort();}
     49   catch(...) { abort(); }
     50   if (!caught) abort();
     51 
     52   // try with an A object
     53   caught = 0;
     54   try { fna((B *)d); }
     55   catch(B *p) { abort(); } // throw type is static type
     56   catch(A *p) { caught = 1; if (p != (B *)d) abort();}
     57   catch(...) { abort(); }
     58   if (!caught) abort();
     59 
     60   caught = 0;
     61   try { fna((C *)d); }
     62   catch(C *p) { abort(); } // throw type is static type
     63   catch(A *p) { caught = 1; if (p != (C *)d) abort();}
     64   catch(...) { abort(); }
     65   if (!caught) abort();
     66 
     67   // try with B object
     68   caught = 0;
     69   try { fnb((B *)d); }
     70   catch(A *p) { caught = 1; if (p != (B *)d) abort();}
     71   catch(...) { abort(); }
     72   if (!caught) abort();
     73 
     74   caught = 0;
     75   try { fnb((B *)d); }
     76   catch(B *p) { caught = 1; if (p != (B *)d) abort();}
     77   catch(...) { abort(); }
     78   if (!caught) abort();
     79 
     80   caught = 0;
     81   try { fnb((B *)d); }
     82   catch(C *p) { abort(); }
     83   catch(D *p) { abort(); }
     84   catch(...) { caught =1; }
     85   if (!caught) abort();
     86 
     87   // try with C object
     88   caught = 0;
     89   try { fnc((C *)d); }
     90   catch(A *p) { caught = 1; if (p != (C *)d) abort();}
     91   catch(...) { abort(); }
     92   if (!caught) abort();
     93 
     94   caught = 0;
     95   try { fnc((C *)d); }
     96   catch(C *p) { caught = 1; if (p != (C *)d) abort();}
     97   catch(...) { abort(); }
     98   if (!caught) abort();
     99 
    100   caught = 0;
    101   try { fnc((C *)d); }
    102   catch(B *p) { abort(); }
    103   catch(D *p) { abort(); }
    104   catch(...) { caught =1; }
    105   if (!caught) abort();
    106 
    107   return;
    108 }
    109 
    110 int main ()
    111 {
    112   D d;
    113   check (&d); // try with an object
    114   check ((D *)0); // try with no object
    115 
    116   return 0;
    117 }
    118