https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89833
Bug ID: 89833
Summary: [9 Regression] sorry, unimplemented: string literal in
function template signature
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: FIXME, rejects-valid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
CC: msebor at gcc dot gnu.org
Target Milestone: ---
When compiled with -std=c++2a this started to fail with r269814:
using size_t = decltype(sizeof(0));
template<typename T, size_t N> struct array { T data[N]; };
template<size_t...> struct index_sequence { };
template<size_t> struct make_index_sequence;
template<> struct make_index_sequence<6> : index_sequence<0, 1, 2, 3, 4, 5> {
};
template <size_t N>
struct mystring : array<char, N> {
template <size_t ...Idx>
constexpr mystring(const char (&str)[N], index_sequence<Idx...>)
: array<char, N>{str[Idx]...} {}
constexpr mystring(const char (&str)[N]) : mystring(str,
make_index_sequence<N>{}) {}
};
template <size_t N>
mystring(const char (&str)[N]) -> mystring<N>;
template <mystring>
struct S {};
S<"Hello"> s;
reg.cc: In instantiation of ‘struct S<mystring<6>{array<char, 6>{"Hello"}}>’:
reg.cc:24:12: required from here
reg.cc:22:10: sorry, unimplemented: string literal in function template
signature
22 | struct S {};
| ^
reg.cc:22:10: sorry, unimplemented: string literal in function template
signature
reg.cc:22:10: sorry, unimplemented: string literal in function template
signature
