File: constexpr-ex3.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 (31 lines) | stat: -rw-r--r-- 544 bytes parent folder | download | duplicates (8) 
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
 
// { dg-do compile { target c++11 } }
// { dg-options "-ftrack-macro-expansion=0" }

#define SA(X) static_assert (X, #X)

struct A
{
  int i;
  constexpr A(int _i) { i = _i; } // { dg-error "empty body|A::i" }
};

template <class T>
struct B
{
  T t;
  constexpr B(T _t): t(_t) { }
};

B<int> b(1);		       // { dg-message "not declared .constexpr" }
SA(b.t==1);			// { dg-error "non-constant condition|'b'" }
constexpr B<int> b2(1);
SA(b2.t==1);

template <class T>
constexpr T f(T a, T b)
{
  typedef T myT;
  return a + b;
}

SA(f(1,2)==3);