File: decltype12.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A7-2018-q2-5
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 539,188 kB
  • sloc: ansic: 2,739,935; cpp: 848,238; ada: 602,637; makefile: 62,919; asm: 55,635; xml: 46,238; exp: 23,020; sh: 19,616; python: 6,371; pascal: 3,889; awk: 3,278; perl: 2,691; yacc: 316; ml: 285; f90: 234; lex: 198; objc: 194; haskell: 119
file content (37 lines) | stat: -rw-r--r-- 1,059 bytes parent folder | download | duplicates (6) 
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
 
// { dg-do compile { target c++11 } }
template<typename T, typename U>
struct is_same
{
  static const bool value = false;
};

template<typename T>
struct is_same<T, T>
{
  static const bool value = true;
};

int&& f(const int&) {}
int&& (*fp)(const int&) = f;
int&& (&fr)(const int&) = f;

struct X { int&& f(const int&); };

int&& (X::*mfp)(const int&) = &X::f;

void g(X& xr, X* xp)
{
  int i;
  static_assert(is_same<decltype(f(i)), int&&>::value, "direct call");
  static_assert(is_same<decltype(fp(i)), int&&>::value, "pointer");
  static_assert(is_same<decltype((*fp)(i)), int&&>::value, 
                "dereferenced pointer");
  static_assert(is_same<decltype(fr(i)), int&&>::value, 
                "reference");
  static_assert(is_same<decltype(xr.f(i)), int&&>::value,
                "member function call");
  static_assert(is_same<decltype((xr.*mfp)(i)), int&&>::value, 
                "member function pointer with .*");
  static_assert(is_same<decltype((xp->*mfp)(i)), int&&>::value, 
                "member function pointer with ->*");
}