else
_M_construct(__str.begin(), __str.end(), std::forward_iterator_tag());
}
+#endif // C++11
+#if __cplusplus >= 202100L
basic_string(nullptr_t) = delete;
basic_string& operator=(nullptr_t) = delete;
-#endif // C++11
+#endif // C++23
/**
* @brief Construct string as copy of a range.
else
_M_dataplus._M_p = _S_construct(__str.begin(), __str.end(), __a);
}
+#endif // C++11
+#if __cplusplus >= 202100L
basic_string(nullptr_t) = delete;
basic_string& operator=(nullptr_t) = delete;
-#endif // C++11
+#endif // C++23
/**
* @brief Construct string as copy of a range.
noexcept(noexcept(ranges::size(__r)) && noexcept(ranges::data(__r)))
: _M_len(ranges::size(__r)), _M_str(ranges::data(__r))
{ }
+
+ basic_string_view(nullptr_t) = delete;
#endif // C++23
#endif // C++20
- basic_string_view(nullptr_t) = delete;
constexpr basic_string_view&
operator=(const basic_string_view&) noexcept = default;
// { dg-do compile { target c++11 } }
#include <string>
-std::string s = nullptr; // { dg-error "deleted" "P2166R1" }
+std::string s = nullptr; // { dg-error "deleted" "P2166R1" { target c++23 } }
+
+struct S
+{
+ operator const char*() const { return ""; }
+ operator std::nullptr_t() const { return {}; }
+};
+
+std::string s2{ S{} }; // { dg-error "deleted" "PR 104099" { target c++23 } }
+
+#if __cpp_concepts
+struct J
+{
+ // In C++20 this selects basic_string(const char*),
+ // in C++23 it's ambiguous due to basic_string(nullptr_t).
+ template<typename T>
+ requires (!std::is_same_v<std::allocator<char>, T>)
+ && (!std::is_same_v<std::string, T>)
+ && (!std::is_same_v<char, T>)
+ && (!std::is_same_v<std::string_view, T>)
+ operator T() const { return {}; }
+};
+
+std::string s3{ J{} }; // { dg-error "ambiguous" "PR 104099" { target c++23 } }
+#endif
{
std::string_view s((const char*)nullptr); // { dg-warning "\\\[-Wnonnull" }
std::string_view t((char*)nullptr); // { dg-warning "\\\[-Wnonnull" }
- std::string_view u(nullptr); // { dg-error "deleted" }
+ std::string_view u(nullptr); // { dg-warning "\\\[-Wnonnull" "" { target c++20_down } }
+// { dg-error "deleted" "P2166R1" { target c++23 } 0 }
}
{
std::wstring_view s((const wchar_t*)nullptr); // { dg-warning "\\\[-Wnonnull" }
std::wstring_view t((wchar_t*)nullptr); // { dg-warning "\\\[-Wnonnull" }
- std::wstring_view u(nullptr); // { dg-error "deleted" }
+ std::wstring_view u(nullptr); // { dg-warning "\\\[-Wnonnull" "" { target c++20_down } }
+// { dg-error "deleted" "P2166R1" { target c++23 } 0 }
}