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Update the portable example to hopefully be more generally portable.

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Change hash_fwd_test to avoid a Borland bug, add 'hash_friend_test' to test for it.

Fix a typo in hash_fwd_test.


[SVN r32747]
This commit is contained in:
Daniel James
2006-02-08 19:03:09 +00:00
parent bb702b827e
commit 47df6bd0fe
5 changed files with 82 additions and 66 deletions
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hash/examples/portable.cpp
+16 -22
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@@ -12,43 +12,37 @@
namespace foo
{
struct custom_type
template <class T>
class custom_type
{
int value;
T value;
public:
custom_type(T x) : value(x) {}
custom_type(int x) : value(x) {}
#ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
friend inline std::size_t hash_value(custom_type x)
{
boost::hash<int> hasher;
return hasher(x.value);
}
#else
std::size_t hash() const
{
boost::hash<int> hasher;
return hasher(value);
}
#endif
template <class T2>
friend std::size_t hash_value(foo::custom_type<T2> x);
};
}
#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
namespace boost
#else
namespace foo
#endif
{
std::size_t hash_value(foo::custom_type x)
template <class T>
std::size_t hash_value(foo::custom_type<T> x)
{
return x.hash();
boost::hash<T> hasher;
return hasher(x.value);
}
}
#endif
int main()
{
foo::custom_type x(1), y(2), z(1);
foo::custom_type<int> x(1), y(2), z(1);
boost::hash<foo::custom_type> hasher;
boost::hash<foo::custom_type<int> > hasher;
assert(hasher(x) == hasher(x));
assert(hasher(x) != hasher(y));