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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s
      2 
      3 struct S { S(int); operator bool(); };
      4 
      5 void f() {
      6   int a;
      7   while (a) ;
      8   while (int x) ; // expected-error {{variable declaration in condition must have an initializer}}
      9   while (float x = 0) ;
     10   if (const int x = a) ; // expected-warning{{empty body}} expected-note{{put the semicolon on a separate line to silence this warning}}
     11   switch (int x = a+10) {}
     12   for (; int x = ++a; ) ;
     13 
     14   if (S a(42)) {} // expected-error {{variable declaration in condition cannot have a parenthesized initializer}}
     15 }
     16