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117 lines
2.2 KiB
C++
117 lines
2.2 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include <crl/common/crl_common_config.h>
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#if __has_include(<QtCore/QPointer>)
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class QObject;
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template <typename T>
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class QPointer;
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template <typename T>
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class QWeakPointer;
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template <typename T>
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class QSharedPointer;
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#if __has_include(<gsl/gsl>)
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namespace gsl {
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template <typename T>
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class not_null;
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} // namespace gsl
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#endif // gsl
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namespace crl {
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template <typename T, typename Enable>
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struct guard_traits;
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template <typename T>
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struct guard_traits<QPointer<T>, void> {
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static QPointer<T> create(const QPointer<T> &value) {
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return value;
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}
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static QPointer<T> create(QPointer<T> &&value) {
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return std::move(value);
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}
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static bool check(const QPointer<T> &guard) {
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return guard.data() != nullptr;
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}
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};
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template <typename T>
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struct guard_traits<
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T*,
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std::enable_if_t<
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std::is_base_of_v<QObject, std::remove_cv_t<T>>>> {
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static QPointer<T> create(T *value) {
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return value;
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}
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static bool check(const QPointer<T> &guard) {
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return guard.data() != nullptr;
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}
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};
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#if __has_include(<gsl/gsl>)
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template <typename T>
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struct guard_traits<
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gsl::not_null<T*>,
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std::enable_if_t<
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std::is_base_of_v<QObject, std::remove_cv_t<T>>>> {
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static QPointer<T> create(gsl::not_null<T*> value) {
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return value.get();
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}
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static bool check(const QPointer<T> &guard) {
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return guard.data() != nullptr;
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}
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};
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#endif // gsl
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template <typename T>
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struct guard_traits<QWeakPointer<T>, void> {
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static QWeakPointer<T> create(const QWeakPointer<T> &value) {
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return value;
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}
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static QWeakPointer<T> create(QWeakPointer<T> &&value) {
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return std::move(value);
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}
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static bool check(const QWeakPointer<T> &guard) {
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return guard.toStrongRef() != nullptr;
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}
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};
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template <typename T>
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struct guard_traits<QSharedPointer<T>, void> {
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static QWeakPointer<T> create(const QSharedPointer<T> &value) {
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return value;
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}
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static QWeakPointer<T> create(QSharedPointer<T> &&value) {
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return value;
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}
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static bool check(const QWeakPointer<T> &guard) {
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return guard.toStrongRef() != nullptr;
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}
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};
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} // namespace crl
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#endif // Qt
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