mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-08 20:32:56 +03:00
9feb1ce39f
The compiler-generated copy constructor and copy assignment operator
already do the right thing (which is to simply copy the underlying
pointer).
The [Itanium C++ ABI][1] treats any class with non-trivial copy/move
constructors and destructors as non-trivial for the purposes of calls --
even if they are functionally identical to the compiler-generated ones.
If a class is non-trivial, it cannot be passed or returned in registers,
only via an invisible reference, which is worse for codegen. This commit
makes `{Nonnull,}GCPtr` trivial.
As the compiler can be sure that capturing a `GCPtr` by value has no
side effects, a few `-Wunused-lambda-capture` warnings had to be
addressed in LibWeb.
GCC seems to have a bug that prevents `ExceptionOr<Variant<GCPtr<T>>>`
from being implicitly constructed from `GCPtr<T>` after this change. A
non-invasive workaround is to explicitly construct the inner Variant
type.
[1]: https://itanium-cxx-abi.github.io/cxx-abi/abi.html#non-trivial
|
||
|---|---|---|
| .. | ||
| Applets | ||
| Applications | ||
| BuggieBox | ||
| Demos | ||
| DevTools | ||
| DynamicLoader | ||
| Games | ||
| Libraries | ||
| Services | ||
| Shell | ||
| Utilities | ||
| CMakeLists.txt | ||