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LibJS: Implement logical expressions
Logical expressions are expressions which can return either true or false according to a provided condition.
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2 changed files with 68 additions and 0 deletions
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@ -27,6 +27,7 @@
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#pragma once
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#include <AK/NonnullOwnPtrVector.h>
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#include <AK/OwnPtr.h>
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#include <AK/String.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Value.h>
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@ -152,6 +153,39 @@ private:
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NonnullOwnPtr<Expression> m_rhs;
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};
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enum class LogicalOp {
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And,
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Or,
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Not
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};
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class LogicalExpression : public Expression {
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public:
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LogicalExpression(LogicalOp op, NonnullOwnPtr<Expression> lhs, NonnullOwnPtr<Expression> rhs)
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: m_op(op)
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, m_lhs(move(lhs))
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, m_rhs(move(rhs))
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{
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}
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LogicalExpression(LogicalOp op, NonnullOwnPtr<Expression> lhs)
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: m_op(op)
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, m_lhs(move(lhs))
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{
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ASSERT(op == LogicalOp::Not);
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}
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virtual Value execute(Interpreter&) const override;
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virtual void dump(int indent) const override;
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private:
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virtual const char* class_name() const override { return "LogicalExpression"; }
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LogicalOp m_op;
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NonnullOwnPtr<Expression> m_lhs;
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OwnPtr<Expression> m_rhs;
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};
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class Literal : public Expression {
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public:
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explicit Literal(Value value)
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