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Issue #77 Break dependency of worker on variant

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This commit is contained in:
Mat Sutcliffe
2020-08-29 22:46:28 +01:00
parent 43bb72788e
commit 1c8fd1b47e
3 changed files with 13 additions and 17 deletions
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17
src/blackmisc/worker.h
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@@ -17,7 +17,6 @@
#include "blackmisc/invoke.h"
#include "blackmisc/promise.h"
#include "blackmisc/stacktrace.h"
#include "blackmisc/variant.h"
#include <QFuture>
#include <QMetaObject>
@@ -30,6 +29,7 @@
#include <QString>
#include <QThread>
#include <QTimer>
#include <QVariant>
#include <QWeakPointer>
#include <QtGlobal>
#include <algorithm>
@@ -211,7 +211,7 @@ namespace BlackMisc
static CWorker *fromTask(QObject *owner, const QString &name, F &&task)
{
int typeId = qMetaTypeId<std::decay_t<decltype(std::forward<F>(task)())>>();
return fromTaskImpl(owner, name, typeId, [task = std::forward<F>(task)]() mutable { return CVariant::fromResultOf(std::move(task)); });
return fromTaskImpl(owner, name, typeId, [task = std::forward<F>(task)]() mutable { return fromResultOf(std::move(task), 0); });
}
//! Connects to a functor to which will be passed the result when the task is finished.
@@ -252,14 +252,19 @@ namespace BlackMisc
void ps_runTask();
private:
CWorker(const std::function<CVariant()> &task) : m_task(task) {}
static CWorker *fromTaskImpl(QObject *owner, const QString &name, int typeId, const std::function<CVariant()> &task);
CWorker(const std::function<QVariant()> &task) : m_task(task) {}
static CWorker *fromTaskImpl(QObject *owner, const QString &name, int typeId, const std::function<QVariant()> &task);
template <typename F>
static auto fromResultOf(F &&func, std::enable_if_t<std::is_void<decltype(func())>::value, int>) { func(); return QVariant(); }
template <typename F>
static auto fromResultOf(F &&func, std::enable_if_t<!std::is_void<decltype(func())>::value, int>) { return QVariant::fromValue(func()); }
template <typename R>
R resultNoWait() { Q_ASSERT(m_result.canConvert<R>()); return m_result.value<R>(); }
std::function<CVariant()> m_task;
CVariant m_result;
std::function<QVariant()> m_task;
QVariant m_result;
};
/*!