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LibJS: Add Reference class to represent a base.property reference

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Expression nodes can now be asked to produce a Reference. We then use
this to implement the "delete" operator without downcasting the child
node to a MemberExpression manually.
This commit is contained in:
Andreas Kling 2020-04-27 12:10:16 +02:00
parent 3a12a8a348
commit 67b8e6fc5b
5 changed files with 105 additions and 9 deletions
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3
Libraries/LibJS/AST.h
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@ -140,6 +140,8 @@ private:
};
class Expression : public ASTNode {
public:
virtual Reference to_reference(Interpreter&) const;
};
class Declaration : public Statement {
@ -755,6 +757,7 @@ public:
virtual Value execute(Interpreter&) const override;
virtual void dump(int indent) const override;
virtual Reference to_reference(Interpreter&) const override;
bool is_computed() const { return m_computed; }
const Expression& object() const { return *m_object; }