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Static assert in CVariant::from to if value type is CVariant

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This commit is contained in:
Roland Winklmeier
2015-05-30 18:06:19 +02:00
parent d3de687db2
commit b6e9d6f0d1
1 changed files with 11 additions and 2 deletions
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13
src/blackmisc/variant.h
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@@ -25,6 +25,7 @@
#include <QJsonValue>
#include <QJsonObject>
#include <QJsonArray>
#include <type_traits>
namespace BlackMisc
{
@@ -215,10 +216,18 @@ namespace BlackMisc
void swap(QVariant &other) { m_v.swap(other); }
//! Construct a variant from a value.
template <typename T> static CVariant fromValue(T &&value) { return CVariant(QVariant::fromValue(std::forward<T>(value))); }
template <typename T> static CVariant fromValue(T &&value)
{
static_assert(!std::is_same<CVariant, T>::value, "CVariant is an illegal type!");
return CVariant(QVariant::fromValue(std::forward<T>(value)));
}
//! Synonym for fromValue().
template <typename T> static CVariant from(T &&value) { return CVariant(QVariant::fromValue(std::forward<T>(value))); }
template <typename T> static CVariant from(T &&value)
{
static_assert(!std::is_same<CVariant, T>::value, "CVariant is an illegal type!");
return CVariant(QVariant::fromValue(std::forward<T>(value)));
}
//! Change the value.
template <typename T> void setValue(T &&value) { m_v.setValue(std::forward<T>(value)); }