1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2 
3 struct S { S(int); operator bool(); };
4 
f()5 void f() {
6   int a;
7   typedef int n;
8 
9   while (a) ;
10   while (int x) ; // expected-error {{variable declaration in condition must have an initializer}}
11   while (float x = 0) ;
12   if (const int x = a) ; // expected-warning{{empty body}} expected-note{{put the semicolon on a separate line to silence this warning}}
13   switch (int x = a+10) {}
14   for (; int x = ++a; ) ;
15 
16   if (S(a)) {} // ok
17   if (S(a) = 0) {} // expected-warning {{redundant parentheses}} expected-note 2{{}}
18   if (S(a) == 0) {} // ok
19 
20   if (S(n)) {} // expected-error {{unexpected type name 'n': expected expression}}
21   if (S(n) = 0) {} // expected-warning {{redundant parentheses}} expected-note 2{{}}
22   if (S(n) == 0) {} // expected-error {{unexpected type name 'n': expected expression}}
23 
24   if (S b(a)) {} // expected-error {{variable declaration in condition cannot have a parenthesized initializer}}
25 
26   if (S b(n)) {} // expected-error {{a function type is not allowed here}}
27   if (S b(n) = 0) {} // expected-error {{a function type is not allowed here}}
28   if (S b(n) == 0) {} // expected-error {{a function type is not allowed here}}
29 
30   S s(a);
31   if (S{s}) {} // ok
32   if (S a{s}) {} // ok
33   if (S a = {s}) {} // ok
34   if (S a == {s}) {} // expected-error {{did you mean '='?}}
35 
36   if (S(b){a}) {} // ok
37   if (S(b) = {a}) {} // ok
38 }
39