File: constexpr-69315.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-- 857 bytes parent folder | download | duplicates (6) 
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
 
// PR c++/69315
// { dg-do compile { target c++11 } }
// { dg-options "-O2" }

// Template instantiation and evaluation for folding within
// finish_function may call finish_function recursively.
// Make sure we don't reject or delay that sort of recursion.

template <bool> struct Iter;

struct Arg {
  Iter<true> begin();
  Iter<true> end();
};

template <bool> struct Iter {
  int operator*();
  Iter operator++();
  template <bool C1, bool C2> friend constexpr bool operator==(Iter<C1>, Iter<C2>);
  template <bool C1, bool C2> friend constexpr bool operator!=(Iter<C1>, Iter<C2>);
};

void func(Arg a) {
  for (auto ch : a) {
    a.begin() == a.end();
  }
}

template <bool C1, bool C2> constexpr bool operator==(Iter<C1>, Iter<C2>) {
  return true;
}

template <bool C1, bool C2> constexpr bool operator!=(Iter<C1> a, Iter<C2> b) {
  return a == b;
}