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LibJS: Implement "throw"

You can now throw an expression to the nearest catcher! :^)

To support throwing arbitrary values, I added an Exception class that
sits as a wrapper around whatever is thrown. In the future it will be
a logical place to store a call stack.
This commit is contained in:
Andreas Kling 2020-03-24 22:03:50 +01:00
parent db024a9cb1
commit faddf3a1db
13 changed files with 160 additions and 7 deletions

View file

@ -675,4 +675,22 @@ private:
RefPtr<BlockStatement> m_finalizer;
};
class ThrowStatement final : public Statement {
public:
explicit ThrowStatement(NonnullRefPtr<Expression> argument)
: m_argument(move(argument))
{
}
const Expression& argument() const { return m_argument; }
virtual void dump(int indent) const override;
virtual Value execute(Interpreter&) const override;
private:
virtual const char* class_name() const override { return "ThrowStatement"; }
NonnullRefPtr<Expression> m_argument;
};
}