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LibJS: Mark classes and virtual functions final where possible

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These cases were found with GCC's `-Wsuggest-final-{types,methods}`
warnings, which catch calls that could have been devirtualized had we
declared the functions `final` in the source.

To reproduce, Link Time Optimization needs to be enabled. The easiest
way to achieve this is to set the `CMAKE_INTERPROCEDURAL_OPTIMIZATION`
cache variable to `ON`. The `.incbin` directive in LibCompress' Brotli
decompressor might needs to be changed to an absolute path for this to
work.

This commit also removes a pair of unused virtual functions.
This commit is contained in:
Daniel Bertalan 2023-08-13 12:53:46 +02:00 • committed by Andreas Kling
parent 72c9f56c66
commit 65232b6681
9 changed files with 17 additions and 20 deletions
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8
Userland/Libraries/LibJS/Runtime/Array.h
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@ -40,10 +40,10 @@ public:
virtual ~Array() override = default;
virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override;
virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const override;
virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override final;
virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override final;
virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override final;
virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const override final;
[[nodiscard]] bool length_is_writable() const { return m_length_writable; }