File: decltype6.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 (35 lines) | stat: -rw-r--r-- 749 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
 
// { dg-do compile { target c++11 } }

template<typename T, typename U> 
struct is_same 
{
  static const bool value = false;
};

template<typename T>
struct is_same<T, T>
{
  static const bool value = true;
};

template<typename T> const T& foo(); 


int i; 

template<typename T>
struct A 
{ 
  double x; 
};

const A<double>* a = new A<double>(); 

static_assert(is_same<decltype(foo<int>()), const int&>::value,
              "type should be const int&");
static_assert(is_same<decltype(i), int>::value,
              "type should be int");
static_assert(is_same<decltype(a->x), double>::value,
              "type should be double");
static_assert(is_same<decltype((a->x)), const double&>::value,
              "type should be const double&");