File: decltype39.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 (19 lines) | stat: -rw-r--r-- 477 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
 
// PR c++/53788
// { dg-do compile { target c++11 } }

struct t { static const bool value = true; };
struct f { static const bool value = false; };

template<typename T>
struct has_static {
  template<typename X>
  static t check(X*, decltype(T::fun())* = 0); // { dg-error "without object" }
  static f check(...);

  typedef decltype(check((T*)(0))) ret;
  static const bool value = ret::value;
};

struct test { int fun() { return 0; } };

bool b = has_static<test>::value;