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re PR libstdc++/89824 (Variant jump table reserves space for __variant_cookie twice)

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PR libstdc++/89824

Fix based on a suggestion by Antony Polukhin.
* include/std/variant (__gen_vtable): Don't reserve an
additional table slot, _Multi_array already does that.

From-SVN: r269941
This commit is contained in:
Ville Voutilainen 2019-03-26 14:41:59 +02:00 • committed by Ville Voutilainen
parent 8be4d02ba9
commit 11767f80f0
2 changed files with 8 additions and 3 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,3 +1,10 @@
2019-03-26 Ville Voutilainen <ville.voutilainen@gmail.com>
PR libstdc++/89824
Fix based on a suggestion by Antony Polukhin.
* include/std/variant (__gen_vtable): Don't reserve an
additional table slot, _Multi_array already does that.
2019-03-26 Ville Voutilainen <ville.voutilainen@gmail.com>
PR libstdc++/89816

4
libstdc++-v3/include/std/variant
View file

@ -904,9 +904,7 @@ namespace __variant
using _Func_ptr = _Result_type (*)(_Visitor&&, _Variants...);
using _Array_type =
_Multi_array<_Func_ptr,
(variant_size_v<remove_reference_t<_Variants>>
+ (is_same_v<_Result_type, __variant_cookie> ? 1 : 0))
...>;
variant_size_v<remove_reference_t<_Variants>>...>;
static constexpr _Array_type
_S_apply()