File: udlit-sfinae.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (38 lines) | stat: -rw-r--r-- 694 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
 
// { dg-do run { target c++11 } }

#include <cassert>

template<bool, typename _Tp = void> struct enable_if { };
template<typename _Tp> struct enable_if<true, _Tp> { typedef _Tp type; };


template <char... c>
constexpr typename enable_if<sizeof...(c) == 2, int>::type operator""_t ()
{
  return 2;
}

template <char... c>
constexpr typename enable_if<sizeof...(c) == 1, int>::type operator""_t ()
{
  return 1;
}

template <char... c>
constexpr typename enable_if<sizeof...(c) >= 3, int>::type operator""_t ()
{
  return 100;
}

int operator""_t (long double)
{
  return 200;
}

int main ()
{
  assert (45_t == 2);
  assert (4_t == 1);
  assert (100000_t == 100);
  assert (200.0_t == 200);
}