https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88812
Bug ID: 88812
Summary: Implement C++20 LWG 2499/P0487R1 - Fixing
operator>>(basic_istream&, CharT*)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: emsr at gcc dot gnu.org
Target Milestone: ---
http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2018/p0487r1.html
TL;DR Just like deletion of gets() the operator>>(char* str) need to be
replaced by ones that take sized buffers:
#if __cplusplus > 201703L
// Not in LWG2499/P0487R1
template<std::size_t _Num>
basic_istream<char>&
operator>>(basic_istream<char>& __in, char (&__s)[_Num]);
template<typename _Traits, std::size_t _Num>
inline basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __in, unsigned char (&__s)[_Num])
{ return (__in >> reinterpret_cast<char*>(__s)); }
template<typename _Traits, std::size_t _Num>
inline basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __in, signed char (&__s)[_Num])
{ return (__in >> reinterpret_cast<char*>(__s)); }
#endif
No, I don't have a complete patch.
We'll need to figure out migration deprecation strategies, ABI compatibility
(keep old sigs in istream.cc, just don't declare publicly?).
