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Comparison mixins implemented with forEachMemberPair instead of toCaseAwareTuple.

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This commit is contained in:
Mathew Sutcliffe
2016-05-21 16:23:55 +01:00
parent f523197dfd
commit fe5e122f12
3 changed files with 58 additions and 107 deletions
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32
src/blackmisc/metaclassprivate.h
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@@ -99,38 +99,6 @@ namespace BlackMisc
template <typename... Ts>
constexpr auto make_tuple(Ts &&... vs) { return tuple<std::decay_t<Ts>...>(std::forward<Ts>(vs)...); }
#endif // ! BLACK_HAS_CONSTEXPR_STDLIB
// Helper for case insensitive comparisons.
template <typename T>
struct CaseInsensitiveWrapper
{
const T &m_ref;
explicit CaseInsensitiveWrapper(const T &ref) : m_ref(ref) {}
friend int compare(CaseInsensitiveWrapper a, CaseInsensitiveWrapper b)
{
return a.m_ref.compare(b.m_ref, Qt::CaseInsensitive);
}
friend bool operator ==(CaseInsensitiveWrapper a, CaseInsensitiveWrapper b)
{
return compare(a, b) == 0;
}
friend bool operator <(CaseInsensitiveWrapper a, CaseInsensitiveWrapper b)
{
return compare(a, b) < 0;
}
};
template <typename T>
auto caseAwareWrap(std::false_type, const T &value)
{
return std::cref(value);
}
template <typename T>
auto caseAwareWrap(std::true_type, const T &value)
{
return CaseInsensitiveWrapper<T>(value);
}
}
}