summaryrefslogtreecommitdiff
path: root/test/SemaCXX/return.cpp
blob: 580f0a7233e2cafe804a02f3abdea0cab2713d43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
// RUN: %clang_cc1 %s -std=c++11 -fcxx-exceptions -fexceptions -fsyntax-only -Wignored-qualifiers -verify

int test1() {
  throw;
}

// PR5071
template<typename T> T f() { }

template<typename T>
void g(T t) {
  return t * 2; // okay
}

template<typename T>
T h() {
  return 17;
}

// Don't warn on cv-qualified class return types, only scalar return types.
namespace ignored_quals {
struct S {};
const S class_c();
const volatile S class_cv();

const int scalar_c(); // expected-warning{{'const' type qualifier on return type has no effect}}
int const scalar_c2(); // expected-warning{{'const' type qualifier on return type has no effect}}

const
char*
const // expected-warning{{'const' type qualifier on return type has no effect}}
f();

char
const*
const // expected-warning{{'const' type qualifier on return type has no effect}}
g();

char* const h(); // expected-warning{{'const' type qualifier on return type has no effect}}
char* volatile i(); // expected-warning{{'volatile' type qualifier on return type has no effect}}

char*
volatile // expected-warning{{'const volatile' type qualifiers on return type have no effect}}
const
j();

const volatile int scalar_cv(); // expected-warning{{'const volatile' type qualifiers on return type have no effect}}

// FIXME: Maintain enough information that we can point the diagnostic at the 'volatile' keyword.
const
int S::*
volatile
mixed_ret(); // expected-warning {{'volatile' type qualifier on return type has no effect}}

const int volatile // expected-warning {{'const volatile' type qualifiers on return type have no effect}}
    (((parens())));

_Atomic(int) atomic();

_Atomic // expected-warning {{'_Atomic' type qualifier on return type has no effect}}
    int
    atomic();

auto
    trailing_return_type() -> // expected-warning {{'const' type qualifier on return type has no effect}}
    const int;

const int ret_array()[4]; // expected-error {{cannot return array}}
}

namespace PR9328 {
  typedef char *PCHAR;
  class Test 
  {
    const PCHAR GetName() { return 0; } // expected-warning{{'const' type qualifier on return type has no effect}}
  };
}

class foo  {
  operator const int ();
  operator int * const ();
};

namespace PR10057 {
  struct S {
    ~S();
  };

  template <class VarType>
  void Test(const VarType& value) {
    return S() = value;
  }
}

namespace return_has_expr {
  struct S {
    S() {
      return 42; // expected-error {{constructor 'S' should not return a value}}
    }
    ~S() {
      return 42; // expected-error {{destructor '~S' should not return a value}}
    }
  };
}