File: sfinae63.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A8-2019-q3-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 571,828 kB
  • sloc: ansic: 2,937,651; cpp: 881,644; ada: 597,189; makefile: 65,528; asm: 56,499; xml: 46,621; exp: 24,747; sh: 19,684; python: 7,256; pascal: 4,370; awk: 3,497; perl: 2,695; yacc: 316; ml: 285; f90: 234; lex: 198; objc: 194; haskell: 119
file content (39 lines) | stat: -rw-r--r-- 698 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
 
// PR c++/61806
// { dg-do compile { target c++11 } }

struct true_type 
{
  static const bool value = true;
};

struct false_type 
{
  static const bool value = false;
};

template<class T>
T&& declval();

template<typename> struct check { typedef void type; };

template<typename T, typename Enable = void>
struct has_public_f : false_type {};

template<typename T>
struct has_public_f<
    T,
    typename check<
        decltype(
            declval<T&>().f()
        )
    >::type
> : true_type {};


struct Spub  { public: void f(); };
struct Spriv { private: void f(); };

static_assert( has_public_f<Spub>::value, "Ouch");
static_assert(!has_public_f<Spriv>::value, "Ouch");

int main() {}