switch.cpp revision b7690b425845b636849f25074d64d30aad646473 
1// RUN: %clang_cc1 -fsyntax-only -verify -Wswitch-enum %s
2
3void test() {
4  bool x = true;
5  switch (x) { // expected-warning {{bool}}
6    case 0:
7      break;
8  }
9
10  int n = 3;
11  switch (n && 1) { // expected-warning {{bool}}
12    case 1:
13      break;
14  }
15}
16
17// PR5518
18struct A {
19  operator int(); // expected-note{{conversion to integral type}}
20};
21
22void x() {
23  switch(A()) {
24  }
25}
26
27enum E { e1, e2 };
28struct B : A {
29  operator E() const; // expected-note{{conversion to enumeration type}}
30};
31
32void x2() {
33  switch (B()) { // expected-error{{multiple conversions}}
34  }
35}
36
37struct C; // expected-note{{forward declaration}}
38
39void x3(C &c) {
40  switch (c) { // expected-error{{incomplete class type}}
41  }
42}
43
44namespace test3 {
45  enum En { A, B, C };
46  template <En how> void foo() {
47    int x = 0, y = 5;
48
49    switch (how) { //expected-warning {{no case matching constant switch condition '2'}}
50    case A: x *= y; break;
51    case B: x += y; break;
52    // No case for C, but it's okay because we have a constant condition.
53    }
54  }
55
56  template void foo<A>();
57  template void foo<B>();
58  template void foo<C>(); //expected-note {{in instantiation}}
59}
60