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refs #457 CWorker support for non-void tasks and thenWithResult().

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This commit is contained in:
Mathew Sutcliffe
2015-09-10 21:10:49 +01:00
parent 6131030267
commit 3cc9468d63
3 changed files with 40 additions and 5 deletions
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9
src/blackmisc/variant.h
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@@ -185,6 +185,12 @@ namespace BlackMisc
return CVariant(QVariant::fromValue(std::forward<T>(value)));
}
//! Call a function and construct a variant from its return value.
template <typename F> static CVariant fromResultOf(F &&func)
{
return fromResultOfImpl(std::forward<F>(func), typename std::is_void<decltype(func())>::type());
}
//! Change the value.
template <typename T> void setValue(T &&value) { m_v.setValue(std::forward<T>(value)); }
@@ -289,6 +295,9 @@ namespace BlackMisc
static int compareImpl(const CVariant &, const CVariant &);
uint getValueHash() const;
template <typename F> static CVariant fromResultOfImpl(F &&func, std::true_type) { std::forward<F>(func)(); return {}; }
template <typename F> static CVariant fromResultOfImpl(F &&func, std::false_type) { return from(std::forward<F>(func)()); }
};
namespace Private