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hash char */const char * as a string by default (to avoid that, cast to byte ptr)

master
Daniel Kolesa 2015-06-30 23:30:48 +01:00
parent 06eeec1ca7
commit b51e84c8b0
1 changed files with 25 additions and 12 deletions
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37
octa/functional.hh
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@ -6,6 +6,8 @@
#ifndef OCTA_FUNCTIONAL_HH
#define OCTA_FUNCTIONAL_HH
#include <string.h>
#include "octa/platform.hh"
#include "octa/new.hh"
#include "octa/memory.hh"
@ -321,21 +323,32 @@ template<> struct ToHash<octa::ldouble>: octa::detail::ScalarHash<octa::ldouble>
}
};
template<typename T> struct ToHash<T *> {
using Argument = T *;
using Result = octa::Size;
namespace detail {
template<typename T, bool = octa::IsSame<octa::RemoveConst<T>, char>::value>
struct ToHashPtr {
using Argument = T *;
using Result = octa::Size;
octa::Size operator()(T *v) const {
union { T *v; octa::Size h; } u;
u.v = v;
return octa::detail::mem_hash((const void *)&u, sizeof(u));
}
};
octa::Size operator()(T *v) const {
union { T *v; octa::Size h; } u;
u.v = v;
return octa::detail::mem_hash((const void *)&u, sizeof(u));
}
};
template<typename T> struct ToHashPtr<T, true> {
using Argument = T *;
using Result = octa::Size;
octa::Size operator()(T *v) const {
return octa::detail::mem_hash(v, strlen(v));
}
};
}
template<typename T> struct ToHash<T *>: octa::detail::ToHashPtr<T> {};
template<typename T>
typename ToHash<octa::RemoveCv<octa::RemoveReference<T>>>::Result
to_hash(const T &v) {
return ToHash<octa::RemoveCv<octa::RemoveReference<T>>>()(v);
typename ToHash<T>::Result to_hash(const T &v) {
return ToHash<T>()(v);
}
/* reference wrapper */