File: auto-fn15.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 (54 lines) | stat: -rw-r--r-- 1,385 bytes parent folder | download | duplicates (4)
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
// { dg-do compile { target c++14 } }
// { dg-options "-Wno-return-local-addr" }

template<class,class> struct same_type;
template<class T> struct same_type<T,T> {};

int& f();
int i;

decltype(auto) g() { return f(); }
decltype(auto) h1() { return i; }
decltype(auto) h2() { return (i); }
decltype(auto) h2a() { return 0,i; }

struct A { int i; };
A a;

decltype(auto) h3() { return a.i; }
decltype(auto) h4() { return (a.i); }

template <class T>
decltype(auto) h5(T t) { return t.i; }
template <class T>
decltype(auto) h6(T t) { return (t.i); }
template <class T>
decltype(auto) h7(T t) { return (i); }

int main()
{
  decltype(auto) i = f();
  same_type<decltype(i),int&>();
  decltype(auto) i2 = i;
  same_type<decltype(i2),int&>();
  decltype(auto) i3 = ::i;
  same_type<decltype(i3),int>();
  decltype(auto) i4 = (::i);
  same_type<decltype(i4),int&>();
  decltype(auto) i5 = a.i;
  same_type<decltype(i5),int>();
  decltype(auto) i6 = (a.i);
  same_type<decltype(i6),int&>();
  decltype(auto) i7 = true ? ::i : ::i;
  same_type<decltype(i7),int&>();

  same_type<decltype(g()),int&>();
  same_type<decltype(h1()),int>();
  same_type<decltype(h2()),int&>();
  same_type<decltype(h2a()),int&>();
  same_type<decltype(h3()),int>();
  same_type<decltype(h4()),int&>();
  same_type<decltype(h5(a)),int>();
  same_type<decltype(h6(a)),int&>();
  same_type<decltype(h7(a)),int&>();
}