File: udlit-raw-length.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 (27 lines) | stat: -rw-r--r-- 543 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
 
// { dg-do compile { target c++11 } }
// PR c++/50958

typedef decltype(sizeof(0)) size_type;

constexpr size_type
cstrlen_impl(const char* s, size_type i)
{
  return s[i] ? cstrlen_impl(s, i + 1) : i;
}

constexpr size_type
cstrlen(const char* s)
{
  return s ? cstrlen_impl(s, 0) : throw 0;
}

constexpr size_type
operator "" _lenraw(const char* digits)
{
  return cstrlen(digits);
}

static_assert(123_lenraw == 3, "Ouch");
static_assert(1_lenraw == 1, "Ouch");
static_assert(012_lenraw == 3, "Ouch");
static_assert(0_lenraw == 1, "Ouch");