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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s
      2 
      3 void f()
      4 {
      5   (void)typeid(int); // expected-error {{you need to include <typeinfo> before using the 'typeid' operator}}
      6 }
      7 
      8 namespace std {
      9   class type_info;
     10 }
     11 
     12 void g()
     13 {
     14   (void)typeid(int);
     15 }
     16 
     17 struct X; // expected-note 3{{forward declaration}}
     18 
     19 void g1(X &x) {
     20   (void)typeid(X); // expected-error{{'typeid' of incomplete type 'X'}}
     21   (void)typeid(X&); // expected-error{{'typeid' of incomplete type 'X'}}
     22   (void)typeid(x); // expected-error{{'typeid' of incomplete type 'X'}}
     23 }
     24