File: constexpr-data2.C

package info (click to toggle)
gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 680,956 kB
  • sloc: ansic: 3,237,715; cpp: 896,882; ada: 772,854; f90: 144,254; asm: 68,788; makefile: 67,456; sh: 29,743; exp: 28,045; objc: 15,273; fortran: 11,885; python: 7,369; pascal: 5,375; awk: 3,725; perl: 2,872; yacc: 316; xml: 311; ml: 285; lex: 198; haskell: 122
file content (46 lines) | stat: -rw-r--r-- 966 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
40
41
42
43
44
45
46
 
// { dg-do compile { target c++11 } }

template<typename _Tp, _Tp v>
  struct A3
  {
    typedef _Tp value_type;
    typedef A3<value_type,v> type;

    static constexpr value_type value = v;

    constexpr operator value_type() { return value; }
  };

// Partial specialization.
template<typename _Tp, _Tp* v>
  struct A3<_Tp*, v>
  {
    typedef _Tp* value_type;
    typedef A3<value_type,v> type;

    static constexpr value_type value = v;

    constexpr operator value_type() { return value; }
  };

// Explicit specialization.
template<>
  struct A3<unsigned short, 0>
  {
    typedef unsigned short value_type;
    typedef A3<value_type, 0> type;

    static constexpr value_type value = 0;

    constexpr operator value_type() { return value; }
  };

// Explicitly instantiate.
template struct A3<int, 415>;

// Extern explicitly instantiate.
extern template struct A3<int, 510>;

// Use.
A3<int, 1111> a31;
A3<char, 9999> a32;		// { dg-warning "overflow" }