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C++: Fix crash when accessing C++ parent

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C++ part of #3464
This commit is contained in:
Olivier Goffart 2025-10-27 16:05:46 +01:00
parent b9bdd01532
commit f07f9fcd70
3 changed files with 253 additions and 93 deletions
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37
api/cpp/include/slint_window.h
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@ -17,6 +17,43 @@ namespace private_api {
using ItemTreeRc = vtable::VRc<cbindgen_private::ItemTreeVTable>;
using slint::LogicalPosition;
/// Looking forward for C++23 std::optional::transform
template<typename T, typename F>
auto optional_transform(const std::optional<T> &o, F &&f) -> decltype(std::optional(f(*o)))
{
if (o) {
return std::optional(f(*o));
}
return std::nullopt;
}
template<typename T, typename F>
void optional_then(const std::optional<T> &o, F &&f)
{
if (o) {
f(*o);
}
}
/// Waiting for C++23 std::optional::and_then
template<typename T, typename F>
auto optional_and_then(const std::optional<T> &o, F &&f) -> decltype(f(*o))
{
if (o) {
return f(*o);
}
return std::nullopt;
}
template<typename T>
T optional_or_default(const std::optional<T> &o)
{
if (o) {
return *o;
}
return {};
}
class WindowAdapterRc
{
public: