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| author | Jonathan Wakely <jwakely@redhat.com> | 2021-10-19 11:53:27 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2021-10-19 15:01:16 +0100 |
| commit | 5a8832b1659e311437d25b7ec8b078be27ae54b8 (patch) | |
| tree | 229b1a38f430ba240fcfb5f9391b849a85d969cb | |
| parent | c4ecb11e4f7ea15f636e463248c8b14083bef05d (diff) | |
| download | gcc-5a8832b1659e311437d25b7ec8b078be27ae54b8.zip gcc-5a8832b1659e311437d25b7ec8b078be27ae54b8.tar.gz gcc-5a8832b1659e311437d25b7ec8b078be27ae54b8.tar.bz2 | |
libstdc++: Change std::variant union member to empty struct
This more clearly expresses the intent (a completely unused, trivial
type) than using char. It's also consistent with the unions in
std::optional.
libstdc++-v3/ChangeLog:
* include/std/variant (_Uninitialized): Use an empty struct
for the unused union member, instead of char.
| -rw-r--r-- | libstdc++-v3/include/std/variant | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant index d18365f..3da7dad 100644 --- a/libstdc++-v3/include/std/variant +++ b/libstdc++-v3/include/std/variant @@ -293,8 +293,10 @@ namespace __variant constexpr _Type&& _M_get() && noexcept { return std::move(_M_storage); } + struct _Empty_byte { }; + union { - char _M_nope; + _Empty_byte _M_empty; _Type _M_storage; }; #else |