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      1 //RUN: %clang_cc1 -fsyntax-only -verify %s
      2 
      3 namespace PR16570 {
      4   int f1(int, int);
      5   int f2(const int, int);
      6   int f3(int&, int);
      7   int f4(const int&, int);
      8 
      9   void good() {
     10     int(*g1)(int, int) = f1;
     11     int(*g2)(const int, int) = f1;
     12     int(*g3)(volatile int, int) = f1;
     13     int(*g4)(int, int) = f2;
     14     int(*g5)(const int, int) = f2;
     15     int(*g6)(volatile int, int) = f2;
     16     int(*g7)(int&, int) = f3;
     17     int(*g8)(const int&, int) = f4;
     18   }
     19 
     20   void bad() {
     21     void (*g1)(int, int) = f1;
     22     // expected-error@-1 {{different return type ('void' vs 'int'}}
     23     const int (*g2)(int, int) = f1;
     24     // expected-error@-1 {{different return type ('const int' vs 'int')}}
     25 
     26     int (*g3)(char, int) = f1;
     27     // expected-error@-1 {{type mismatch at 1st parameter ('char' vs 'int')}}
     28     int (*g4)(int, char) = f1;
     29     // expected-error@-1 {{type mismatch at 2nd parameter ('char' vs 'int')}}
     30 
     31     int (*g5)(int) = f1;
     32     // expected-error@-1 {{different number of parameters (1 vs 2)}}
     33 
     34     int (*g6)(int, int, int) = f1;
     35     // expected-error@-1 {{different number of parameters (3 vs 2)}}
     36 
     37     int (*g7)(const int, char) = f1;
     38     // expected-error@-1 {{type mismatch at 2nd parameter ('char' vs 'int')}}
     39     int (*g8)(int, char) = f2;
     40     // expected-error@-1 {{type mismatch at 2nd parameter ('char' vs 'int')}}
     41     int (*g9)(const int&, char) = f3;
     42     // expected-error@-1 {{type mismatch at 1st parameter ('const int &' vs 'int &')}}
     43     int (*g10)(int&, char) = f4;
     44     // expected-error@-1 {{type mismatch at 1st parameter ('int &' vs 'const int &')}}
     45   }
     46 
     47   typedef void (*F)(const char * __restrict__, int);
     48   void g(const char *, unsigned);
     49   F f = g;
     50   // expected-error@-1 {{type mismatch at 2nd parameter ('int' vs 'unsigned int')}}
     51 
     52 }
     53