1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 2 3 void test() { 4 int x; 5 if (x) ++x; 6 if (int x=0) ++x; 7 8 typedef int arr[10]; 9 while (arr x={0}) ; // expected-error {{an array type is not allowed here}} 10 while (int f()=0) ; // expected-error {{a function type is not allowed here}} 11 12 struct S {} s; 13 if (s) ++x; // expected-error {{value of type 'struct S' is not contextually convertible to 'bool'}} 14 while (struct S x=s) ; // expected-error {{value of type 'struct S' is not contextually convertible to 'bool'}} 15 do ; while (s); // expected-error {{value of type 'struct S' is not contextually convertible to 'bool'}} 16 for (;s;) ; // expected-error {{value of type 'struct S' is not contextually convertible to 'bool'}} 17 switch (s) {} // expected-error {{statement requires expression of integer type ('struct S' invalid)}} 18 19 while (struct NewS *x=0) ; 20 while (struct S {} *x=0) ; // expected-error {{'S' cannot be defined in a condition}} 21 while (struct {} *x=0) ; // expected-error-re {{'(anonymous struct at {{.*}})' cannot be defined in a condition}} 22 switch (enum {E} x=0) ; // expected-error-re {{'(anonymous enum at {{.*}})' cannot be defined in a condition}} 23 24 if (int x=0) { // expected-note 2 {{previous definition is here}} 25 int x; // expected-error {{redefinition of 'x'}} 26 } 27 else 28 int x; // expected-error {{redefinition of 'x'}} 29 while (int x=0) int x; // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 30 while (int x=0) { int x; } // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 31 for (int x; int x=0; ) ; // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 32 for (int x; ; ) int x; // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 33 for (; int x=0; ) int x; // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 34 for (; int x=0; ) { int x; } // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 35 switch (int x=0) { default: int x; } // expected-error {{redefinition of 'x'}} expected-note {{previous definition is here}} 36 } 37 38 int* get_int_ptr(); 39 40 void test2() { 41 float *ip; 42 if (int *ip = ip) { 43 } 44 } 45 46 // Make sure we do function/array decay. 47 void test3() { 48 if ("help") 49 (void) 0; 50 51 if (test3) // expected-warning {{address of function 'test3' will always evaluate to 'true'}} \ 52 expected-note {{prefix with the address-of operator to silence this warning}} 53 (void) 0; 54 } 55 56 void test4(bool (&x)(void)) { 57 while (x); 58 } 59 60 template <class> 61 void test5() { 62 if (struct S {}* p = 0) // expected-error {{'S' cannot be defined in a condition}} 63 ; 64 } 65 void test5_inst() { 66 test5<int>(); 67 } 68 69 void PR28373() { 70 if (!x) {} // expected-error {{undeclared}} 71 } 72
