File: constexpr-if31.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (79 lines) | stat: -rw-r--r-- 1,199 bytes parent folder | download | duplicates (2)
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
// PR c++/81676 - bogus -Wunused warnings in constexpr if.
// { dg-do compile { target c++17 } }
// { dg-options "-Wall -Wextra" }

template <typename T> int
f1 (T v)
{
  T x = 0;
  if constexpr(sizeof(T) == sizeof(int))
    return v + x;
  else
    return 0;
}

template <typename T> int
f2 (T v) // { dg-warning "unused parameter .v." }
{
  T x = 0;
  if constexpr(sizeof(T) == sizeof(int))
    return x;
  else
    return 0;
}

template <typename T> int
f3 (T v)
{
  T x = 0; // { dg-warning "unused variable .x." }
  if constexpr(sizeof(T) == sizeof(int))
    return v;
  else
    return 0;
}

template <typename T> int
f4 (T v)
{
  T x = 0;
  if constexpr(sizeof(T) == sizeof(int))
    return 0;
  else
    return v + x;
}

template <typename T> int
f5 (T v) // { dg-warning "unused parameter .v." }
{
  T x = 0;
  if constexpr(sizeof(T) == sizeof(int))
    return 0;
  else
    return x;
}

template <typename T> int
f6 (T v)
{
  T x = 0; // { dg-warning "unused variable .x." }
  if constexpr(sizeof(T) == sizeof(int))
    return 0;
  else
    return v;
}

int main()
{
  f1(0);
  f1('a');
  f2(0);
  f2('a');
  f3(0);
  f3('a');
  f4(0);
  f4('a');
  f5(0);
  f5('a');
  f6(0);
  f6('a');
}