File: constexpr-function3.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 (29 lines) | stat: -rw-r--r-- 541 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
 
// { dg-do compile { target c++11 } }

// From N2235

// function template 1
template<typename T>
  constexpr int bytesize(T t)
  { return sizeof (t); }        // OK

char buf[bytesize(0)];          // OK -- not C99 VLA


// function template 2
template<typename _Tp>
  constexpr _Tp
  square(_Tp x) { return x; }

// Explicit specialization
template<>
  constexpr unsigned long
  square(unsigned long x) { return x * x; }

// Explicit instantiation
template int square(int);

class A { };
template A square(A);

template long square(long);