1 // { dg-do compile { target c++11 } }
2 // PR c++/50958
3 
4 typedef decltype(sizeof(0)) size_type;
5 
6 constexpr size_type
cstrlen_impl(const char * s,size_type i)7 cstrlen_impl(const char* s, size_type i)
8 {
9   return s[i] ? cstrlen_impl(s, i + 1) : i;
10 }
11 
12 constexpr size_type
cstrlen(const char * s)13 cstrlen(const char* s)
14 {
15   return s ? cstrlen_impl(s, 0) : throw 0;
16 }
17 
18 constexpr size_type
19 operator "" _lenraw(const char* digits)
20 {
21   return cstrlen(digits);
22 }
23 
24 static_assert(123_lenraw == 3, "Ouch");
25 static_assert(1_lenraw == 1, "Ouch");
26 static_assert(012_lenraw == 3, "Ouch");
27 static_assert(0_lenraw == 1, "Ouch");
28