File: constexpr-targ2.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 (40 lines) | stat: -rw-r--r-- 786 bytes parent folder | download | duplicates (10) 
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
 
// PR c++/65498
// { dg-do compile { target c++11 } }

template <typename, typename>
struct is_same
{
  enum { value = false };
  constexpr bool operator()() const noexcept { return value; }
};

template <typename T>
struct is_same<T, T>
{
  enum { value = true };
  constexpr bool operator()() const noexcept { return value; }
};

template <bool, typename = void>
struct enable_if { };

template <typename T>
struct enable_if<true, T> { typedef T type; };

struct A;

template <typename, typename = void>
struct F { };

template <typename X>
struct F<X, typename enable_if<is_same<X, A>{}()>::type> {
    template <typename MakeDependent>
    F(MakeDependent) {
        auto ICE_HERE = __func__;
        (void)ICE_HERE; // avoid -Wunused-variable
    }
};

int main() {
    F<A>{1};
}