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| author | Jonathan Wakely <jwakely@redhat.com> | 2021-10-01 21:27:24 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2021-10-04 15:23:28 +0100 |
| commit | cf876562c592193732f869e9f96034a42d0fad89 (patch) | |
| tree | bea69f3de5d35fa5396f00ad388640f2b82748d2 /gcc/expr.c | |
| parent | fa3ccf8bfe9940b439d6cc2c38ee8da134b0ff2d (diff) | |
| download | gcc-cf876562c592193732f869e9f96034a42d0fad89.zip gcc-cf876562c592193732f869e9f96034a42d0fad89.tar.gz gcc-cf876562c592193732f869e9f96034a42d0fad89.tar.bz2 | |
libstdc++: Disable std::string{,_view} construction from nullptr (P2166R1)
Implement this C++23 feature. Because construction from a null pointer
is undefined, we can implement it for C++11 and up, turning undefined
behaviour into a compilation error.
libstdc++-v3/ChangeLog:
* include/bits/basic_string.h (basic_string(nullptr_t)): Define
as deleted.
(operator=(nullptr_t)): Likewise.
* include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
(operator=(nullptr_t)): Likewise.
* include/std/string_view (basic_string_view(nullptr_t)):
Likewise.
* testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
* testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
Change dg-warning to dg-error.
* testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
Likewise.
Diffstat (limited to 'gcc/expr.c')
0 files changed, 0 insertions, 0 deletions