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Tweak the std::hash<> specialization for aarch64_features.

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Move the specialization into an explicit std namespace to workaround a
bug in older compilers.  GCC 6.4.1 at least fails to compile the previous
version with the following error:

gdb/arch/aarch64.h:48:13: error: specialization of 'template<class _Tp> struct std::hash' in different namespace [-fpermissive]

  struct std::hash<aarch64_features>
This commit is contained in:
John Baldwin
2022-05-23 11:02:55 -07:00
parent d9b6e047f6
commit e8123c847f
1 changed files with 14 additions and 11 deletions
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25
gdb/arch/aarch64.h
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@@ -44,20 +44,23 @@ inline bool operator==(const aarch64_features &lhs, const aarch64_features &rhs)
&& lhs.tls == rhs.tls; && lhs.tls == rhs.tls;
} }
template<> namespace std
struct std::hash<aarch64_features>
{ {
std::size_t operator()(const aarch64_features &features) const noexcept template<>
struct hash<aarch64_features>
{ {
std::size_t h; std::size_t operator()(const aarch64_features &features) const noexcept
{
std::size_t h;
h = features.vq; h = features.vq;
h = h << 1 | features.pauth; h = h << 1 | features.pauth;
h = h << 1 | features.mte; h = h << 1 | features.mte;
h = h << 1 | features.tls; h = h << 1 | features.tls;
return h; return h;
} }
}; };
}
/* Create the aarch64 target description. */ /* Create the aarch64 target description. */