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LibJS: Add Object::get_without_side_effects()
Similar to Value::to_string_without_side_effects() this is mostly a regular object property lookup, but with the guarantee that it will be side-effect free, i.e. no accessors or native property functions will be called. This is needed when we want to access user-controlled object properties for debug logging, for example. The specific use case will be error objects which will soon no longer have internal name/message properties, so we need to guarantee that printing an error, which may already be the result of an exception, won't blow up in our face :^)
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4 changed files with 23 additions and 11 deletions
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@ -55,7 +55,7 @@ public:
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virtual Optional<PropertyDescriptor> get_own_property_descriptor(const PropertyName&) const override;
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virtual bool define_property(const StringOrSymbol& property_name, const Object& descriptor, bool throw_exceptions = true) override;
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virtual bool has_property(const PropertyName& name) const override;
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virtual Value get(const PropertyName& name, Value receiver) const override;
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virtual Value get(const PropertyName& name, Value receiver, bool without_side_effects = false) const override;
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virtual bool put(const PropertyName& name, Value value, Value receiver) override;
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virtual bool delete_property(const PropertyName& name) override;
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