Adding upstream version 2.14.2.upstream/2.14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 986 insertions, 0 deletions

diff --git a/lib/config/expression.hpp b/lib/config/expression.hpp
new file mode 100644
index 0000000..644548d
--- /dev/null
+++ b/lib/config/expression.hpp
@@ -0,0 +1,986 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#ifndef EXPRESSION_H
+#define EXPRESSION_H
+
+#include "config/i2-config.hpp"
+#include "base/debuginfo.hpp"
+#include "base/array.hpp"
+#include "base/dictionary.hpp"
+#include "base/function.hpp"
+#include "base/exception.hpp"
+#include "base/scriptframe.hpp"
+#include "base/shared-object.hpp"
+#include "base/convert.hpp"
+#include <map>
+
+namespace icinga
+{
+
+struct DebugHint
+{
+public:
+	DebugHint(Dictionary::Ptr hints = nullptr)
+		: m_Hints(std::move(hints))
+	{ }
+
+	DebugHint(Dictionary::Ptr&& hints)
+		: m_Hints(std::move(hints))
+	{ }
+
+	void AddMessage(const String& message, const DebugInfo& di)
+	{
+		GetMessages()->Add(new Array({ message, di.Path, di.FirstLine, di.FirstColumn, di.LastLine, di.LastColumn }));
+	}
+
+	DebugHint GetChild(const String& name)
+	{
+		const Dictionary::Ptr& children = GetChildren();
+
+		Value vchild;
+		Dictionary::Ptr child;
+
+		if (!children->Get(name, &vchild)) {
+			child = new Dictionary();
+			children->Set(name, child);
+		} else
+			child = vchild;
+
+		return DebugHint(child);
+	}
+
+	Dictionary::Ptr ToDictionary() const
+	{
+		return m_Hints;
+	}
+
+private:
+	Dictionary::Ptr m_Hints;
+	Array::Ptr m_Messages;
+	Dictionary::Ptr m_Children;
+
+	const Array::Ptr& GetMessages()
+	{
+		if (m_Messages)
+			return m_Messages;
+
+		if (!m_Hints)
+			m_Hints = new Dictionary();
+
+		Value vmessages;
+
+		if (!m_Hints->Get("messages", &vmessages)) {
+			m_Messages = new Array();
+			m_Hints->Set("messages", m_Messages);
+		} else
+			m_Messages = vmessages;
+
+		return m_Messages;
+	}
+
+	const Dictionary::Ptr& GetChildren()
+	{
+		if (m_Children)
+			return m_Children;
+
+		if (!m_Hints)
+			m_Hints = new Dictionary();
+
+		Value vchildren;
+
+		if (!m_Hints->Get("properties", &vchildren)) {
+			m_Children = new Dictionary();
+			m_Hints->Set("properties", m_Children);
+		} else
+			m_Children = vchildren;
+
+		return m_Children;
+	}
+};
+
+enum CombinedSetOp
+{
+	OpSetLiteral,
+	OpSetAdd,
+	OpSetSubtract,
+	OpSetMultiply,
+	OpSetDivide,
+	OpSetModulo,
+	OpSetXor,
+	OpSetBinaryAnd,
+	OpSetBinaryOr
+};
+
+enum ScopeSpecifier
+{
+	ScopeLocal,
+	ScopeThis,
+	ScopeGlobal
+};
+
+typedef std::map<String, String> DefinitionMap;
+
+/**
+ * @ingroup config
+ */
+enum ExpressionResultCode
+{
+	ResultOK,
+	ResultReturn,
+	ResultContinue,
+	ResultBreak
+};
+
+/**
+ * @ingroup config
+ */
+struct ExpressionResult
+{
+public:
+	template<typename T>
+	ExpressionResult(T value, ExpressionResultCode code = ResultOK)
+		: m_Value(std::move(value)), m_Code(code)
+	{ }
+
+	operator const Value&() const
+	{
+		return m_Value;
+	}
+
+	const Value& GetValue() const
+	{
+		return m_Value;
+	}
+
+	ExpressionResultCode GetCode() const
+	{
+		return m_Code;
+	}
+
+private:
+	Value m_Value;
+	ExpressionResultCode m_Code;
+};
+
+#define CHECK_RESULT(res)			\
+	do {					\
+		if (res.GetCode() != ResultOK)	\
+			return res;		\
+	} while (0);
+
+#define CHECK_RESULT_LOOP(res)			\
+	if (res.GetCode() == ResultReturn)	\
+		return res;			\
+	if (res.GetCode() == ResultContinue)	\
+		continue;			\
+	if (res.GetCode() == ResultBreak)	\
+		break;				\
+
+/**
+ * @ingroup config
+ */
+class Expression : public SharedObject
+{
+public:
+	DECLARE_PTR_TYPEDEFS(Expression);
+
+	Expression() = default;
+	Expression(const Expression&) = delete;
+	virtual ~Expression();
+
+	Expression& operator=(const Expression&) = delete;
+
+	ExpressionResult Evaluate(ScriptFrame& frame, DebugHint *dhint = nullptr) const;
+	virtual bool GetReference(ScriptFrame& frame, bool init_dict, Value *parent, String *index, DebugHint **dhint = nullptr) const;
+	virtual const DebugInfo& GetDebugInfo() const;
+
+	virtual ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const = 0;
+
+	static boost::signals2::signal<void (ScriptFrame& frame, ScriptError *ex, const DebugInfo& di)> OnBreakpoint;
+
+	static void ScriptBreakpoint(ScriptFrame& frame, ScriptError *ex, const DebugInfo& di);
+};
+
+std::unique_ptr<Expression> MakeIndexer(ScopeSpecifier scopeSpec, const String& index);
+
+class OwnedExpression final : public Expression
+{
+public:
+	OwnedExpression(Expression::Ptr expression)
+		: m_Expression(std::move(expression))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override
+	{
+		return m_Expression->DoEvaluate(frame, dhint);
+	}
+
+	const DebugInfo& GetDebugInfo() const override
+	{
+		return m_Expression->GetDebugInfo();
+	}
+
+private:
+	Expression::Ptr m_Expression;
+};
+
+class LiteralExpression final : public Expression
+{
+public:
+	LiteralExpression(Value value = Value());
+
+	const Value& GetValue() const
+	{
+		return m_Value;
+	}
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	Value m_Value;
+};
+
+inline LiteralExpression *MakeLiteralRaw(const Value& literal = Value())
+{
+	return new LiteralExpression(literal);
+}
+
+inline std::unique_ptr<LiteralExpression> MakeLiteral(const Value& literal = Value())
+{
+	return std::unique_ptr<LiteralExpression>(MakeLiteralRaw(literal));
+}
+
+class DebuggableExpression : public Expression
+{
+public:
+	DebuggableExpression(DebugInfo debugInfo = DebugInfo())
+		: m_DebugInfo(std::move(debugInfo))
+	{ }
+
+protected:
+	const DebugInfo& GetDebugInfo() const final;
+
+	DebugInfo m_DebugInfo;
+};
+
+class UnaryExpression : public DebuggableExpression
+{
+public:
+	UnaryExpression(std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Operand(std::move(operand))
+	{ }
+
+protected:
+	std::unique_ptr<Expression> m_Operand;
+};
+
+class BinaryExpression : public DebuggableExpression
+{
+public:
+	BinaryExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Operand1(std::move(operand1)), m_Operand2(std::move(operand2))
+	{ }
+
+	inline const std::unique_ptr<Expression>& GetOperand1() const noexcept
+	{
+		return m_Operand1;
+	}
+
+	inline const std::unique_ptr<Expression>& GetOperand2() const noexcept
+	{
+		return m_Operand2;
+	}
+
+protected:
+	std::unique_ptr<Expression> m_Operand1;
+	std::unique_ptr<Expression> m_Operand2;
+};
+
+class VariableExpression final : public DebuggableExpression
+{
+public:
+	VariableExpression(String variable, std::vector<Expression::Ptr> imports, const DebugInfo& debugInfo = DebugInfo());
+
+	inline const String& GetVariable() const
+	{
+		return m_Variable;
+	}
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+	bool GetReference(ScriptFrame& frame, bool init_dict, Value *parent, String *index, DebugHint **dhint) const override;
+
+private:
+	String m_Variable;
+	std::vector<Expression::Ptr> m_Imports;
+
+	friend void BindToScope(std::unique_ptr<Expression>& expr, ScopeSpecifier scopeSpec);
+};
+
+class DerefExpression final : public UnaryExpression
+{
+public:
+	DerefExpression(std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(operand), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+	bool GetReference(ScriptFrame& frame, bool init_dict, Value *parent, String *index, DebugHint **dhint) const override;
+};
+
+class RefExpression final : public UnaryExpression
+{
+public:
+	RefExpression(std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(operand), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class NegateExpression final : public UnaryExpression
+{
+public:
+	NegateExpression(std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(operand), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class LogicalNegateExpression final : public UnaryExpression
+{
+public:
+	LogicalNegateExpression(std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(operand), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class AddExpression final : public BinaryExpression
+{
+public:
+	AddExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class SubtractExpression final : public BinaryExpression
+{
+public:
+	SubtractExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class MultiplyExpression final : public BinaryExpression
+{
+public:
+	MultiplyExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class DivideExpression final : public BinaryExpression
+{
+public:
+	DivideExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class ModuloExpression final : public BinaryExpression
+{
+public:
+	ModuloExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class XorExpression final : public BinaryExpression
+{
+public:
+	XorExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class BinaryAndExpression final : public BinaryExpression
+{
+public:
+	BinaryAndExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class BinaryOrExpression final : public BinaryExpression
+{
+public:
+	BinaryOrExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class ShiftLeftExpression final : public BinaryExpression
+{
+public:
+	ShiftLeftExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class ShiftRightExpression final : public BinaryExpression
+{
+public:
+	ShiftRightExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class EqualExpression final : public BinaryExpression
+{
+public:
+	EqualExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class NotEqualExpression final : public BinaryExpression
+{
+public:
+	NotEqualExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class LessThanExpression final : public BinaryExpression
+{
+public:
+	LessThanExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class GreaterThanExpression final : public BinaryExpression
+{
+public:
+	GreaterThanExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class LessThanOrEqualExpression final : public BinaryExpression
+{
+public:
+	LessThanOrEqualExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class GreaterThanOrEqualExpression final : public BinaryExpression
+{
+public:
+	GreaterThanOrEqualExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class InExpression final : public BinaryExpression
+{
+public:
+	InExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class NotInExpression final : public BinaryExpression
+{
+public:
+	NotInExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class LogicalAndExpression final : public BinaryExpression
+{
+public:
+	LogicalAndExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class LogicalOrExpression final : public BinaryExpression
+{
+public:
+	LogicalOrExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class FunctionCallExpression final : public DebuggableExpression
+{
+public:
+	FunctionCallExpression(std::unique_ptr<Expression> fname, std::vector<std::unique_ptr<Expression> >&& args, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_FName(std::move(fname)), m_Args(std::move(args))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+public:
+	std::unique_ptr<Expression> m_FName;
+	std::vector<std::unique_ptr<Expression> > m_Args;
+};
+
+class ArrayExpression final : public DebuggableExpression
+{
+public:
+	ArrayExpression(std::vector<std::unique_ptr<Expression > >&& expressions, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Expressions(std::move(expressions))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::vector<std::unique_ptr<Expression> > m_Expressions;
+};
+
+class DictExpression final : public DebuggableExpression
+{
+public:
+	DictExpression(std::vector<std::unique_ptr<Expression> >&& expressions = {}, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Expressions(std::move(expressions))
+	{ }
+
+	void MakeInline();
+
+	inline const std::vector<std::unique_ptr<Expression>>& GetExpressions() const noexcept
+	{
+		return m_Expressions;
+	}
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::vector<std::unique_ptr<Expression> > m_Expressions;
+	bool m_Inline{false};
+
+	friend void BindToScope(std::unique_ptr<Expression>& expr, ScopeSpecifier scopeSpec);
+};
+
+class SetConstExpression final : public UnaryExpression
+{
+public:
+	SetConstExpression(const String& name, std::unique_ptr<Expression> operand, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(operand), debugInfo), m_Name(name)
+	{ }
+
+protected:
+	String m_Name;
+
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class SetExpression final : public BinaryExpression
+{
+public:
+	SetExpression(std::unique_ptr<Expression> operand1, CombinedSetOp op, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo), m_Op(op)
+	{ }
+
+	void SetOverrideFrozen();
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	CombinedSetOp m_Op;
+	bool m_OverrideFrozen{false};
+
+	friend void BindToScope(std::unique_ptr<Expression>& expr, ScopeSpecifier scopeSpec);
+};
+
+class ConditionalExpression final : public DebuggableExpression
+{
+public:
+	ConditionalExpression(std::unique_ptr<Expression> condition, std::unique_ptr<Expression> true_branch, std::unique_ptr<Expression> false_branch, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Condition(std::move(condition)), m_TrueBranch(std::move(true_branch)), m_FalseBranch(std::move(false_branch))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::unique_ptr<Expression> m_Condition;
+	std::unique_ptr<Expression> m_TrueBranch;
+	std::unique_ptr<Expression> m_FalseBranch;
+};
+
+class WhileExpression final : public DebuggableExpression
+{
+public:
+	WhileExpression(std::unique_ptr<Expression> condition, std::unique_ptr<Expression> loop_body, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Condition(std::move(condition)), m_LoopBody(std::move(loop_body))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::unique_ptr<Expression> m_Condition;
+	std::unique_ptr<Expression> m_LoopBody;
+};
+
+
+class ReturnExpression final : public UnaryExpression
+{
+public:
+	ReturnExpression(std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(expression), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class BreakExpression final : public DebuggableExpression
+{
+public:
+	BreakExpression(const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class ContinueExpression final : public DebuggableExpression
+{
+public:
+	ContinueExpression(const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class GetScopeExpression final : public Expression
+{
+public:
+	GetScopeExpression(ScopeSpecifier scopeSpec)
+		: m_ScopeSpec(scopeSpec)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	ScopeSpecifier m_ScopeSpec;
+};
+
+class IndexerExpression final : public BinaryExpression
+{
+public:
+	IndexerExpression(std::unique_ptr<Expression> operand1, std::unique_ptr<Expression> operand2, const DebugInfo& debugInfo = DebugInfo())
+		: BinaryExpression(std::move(operand1), std::move(operand2), debugInfo)
+	{ }
+
+	void SetOverrideFrozen();
+
+protected:
+	bool m_OverrideFrozen{false};
+
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+	bool GetReference(ScriptFrame& frame, bool init_dict, Value *parent, String *index, DebugHint **dhint) const override;
+
+	friend void BindToScope(std::unique_ptr<Expression>& expr, ScopeSpecifier scopeSpec);
+};
+
+void BindToScope(std::unique_ptr<Expression>& expr, ScopeSpecifier scopeSpec);
+
+class ThrowExpression final : public DebuggableExpression
+{
+public:
+	ThrowExpression(std::unique_ptr<Expression> message, bool incompleteExpr, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Message(std::move(message)), m_IncompleteExpr(incompleteExpr)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::unique_ptr<Expression> m_Message;
+	bool m_IncompleteExpr;
+};
+
+class ImportExpression final : public DebuggableExpression
+{
+public:
+	ImportExpression(std::unique_ptr<Expression> name, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Name(std::move(name))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::unique_ptr<Expression> m_Name;
+};
+
+class ImportDefaultTemplatesExpression final : public DebuggableExpression
+{
+public:
+	ImportDefaultTemplatesExpression(const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class FunctionExpression final : public DebuggableExpression
+{
+public:
+	FunctionExpression(String name, std::vector<String> args,
+		std::map<String, std::unique_ptr<Expression> >&& closedVars, std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Name(std::move(name)), m_Args(std::move(args)), m_ClosedVars(std::move(closedVars)), m_Expression(expression.release())
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	String m_Name;
+	std::vector<String> m_Args;
+	std::map<String, std::unique_ptr<Expression> > m_ClosedVars;
+	Expression::Ptr m_Expression;
+};
+
+class ApplyExpression final : public DebuggableExpression
+{
+public:
+	ApplyExpression(String type, String target, std::unique_ptr<Expression> name,
+		std::unique_ptr<Expression> filter, String package, String fkvar, String fvvar,
+		std::unique_ptr<Expression> fterm, std::map<String, std::unique_ptr<Expression> >&& closedVars, bool ignoreOnError,
+		std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Type(std::move(type)), m_Target(std::move(target)),
+			m_Name(std::move(name)), m_Filter(filter.release()), m_Package(std::move(package)), m_FKVar(std::move(fkvar)), m_FVVar(std::move(fvvar)),
+			m_FTerm(fterm.release()), m_IgnoreOnError(ignoreOnError), m_ClosedVars(std::move(closedVars)),
+			m_Expression(expression.release())
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	String m_Type;
+	String m_Target;
+	std::unique_ptr<Expression> m_Name;
+	Expression::Ptr m_Filter;
+	String m_Package;
+	String m_FKVar;
+	String m_FVVar;
+	Expression::Ptr m_FTerm;
+	bool m_IgnoreOnError;
+	std::map<String, std::unique_ptr<Expression> > m_ClosedVars;
+	Expression::Ptr m_Expression;
+};
+
+class NamespaceExpression final : public DebuggableExpression
+{
+public:
+	NamespaceExpression(std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Expression(expression.release())
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	Expression::Ptr m_Expression;
+};
+
+class ObjectExpression final : public DebuggableExpression
+{
+public:
+	ObjectExpression(bool abstract, std::unique_ptr<Expression> type, std::unique_ptr<Expression> name, std::unique_ptr<Expression> filter,
+		String zone, String package, std::map<String, std::unique_ptr<Expression> >&& closedVars,
+		bool defaultTmpl, bool ignoreOnError, std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_Abstract(abstract), m_Type(std::move(type)),
+		m_Name(std::move(name)), m_Filter(filter.release()), m_Zone(std::move(zone)), m_Package(std::move(package)), m_DefaultTmpl(defaultTmpl),
+		m_IgnoreOnError(ignoreOnError), m_ClosedVars(std::move(closedVars)), m_Expression(expression.release())
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	bool m_Abstract;
+	std::unique_ptr<Expression> m_Type;
+	std::unique_ptr<Expression> m_Name;
+	Expression::Ptr m_Filter;
+	String m_Zone;
+	String m_Package;
+	bool m_DefaultTmpl;
+	bool m_IgnoreOnError;
+	std::map<String, std::unique_ptr<Expression> > m_ClosedVars;
+	Expression::Ptr m_Expression;
+};
+
+class ForExpression final : public DebuggableExpression
+{
+public:
+	ForExpression(String fkvar, String fvvar, std::unique_ptr<Expression> value, std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_FKVar(std::move(fkvar)), m_FVVar(std::move(fvvar)), m_Value(std::move(value)), m_Expression(std::move(expression))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	String m_FKVar;
+	String m_FVVar;
+	std::unique_ptr<Expression> m_Value;
+	std::unique_ptr<Expression> m_Expression;
+};
+
+class LibraryExpression final : public UnaryExpression
+{
+public:
+	LibraryExpression(std::unique_ptr<Expression> expression, const DebugInfo& debugInfo = DebugInfo())
+		: UnaryExpression(std::move(expression), debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+enum IncludeType
+{
+	IncludeRegular,
+	IncludeRecursive,
+	IncludeZones
+};
+
+class IncludeExpression final : public DebuggableExpression
+{
+public:
+	IncludeExpression(String relativeBase, std::unique_ptr<Expression> path, std::unique_ptr<Expression> pattern, std::unique_ptr<Expression> name,
+		IncludeType type, bool searchIncludes, String zone, String package, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_RelativeBase(std::move(relativeBase)), m_Path(std::move(path)), m_Pattern(std::move(pattern)),
+		m_Name(std::move(name)), m_Type(type), m_SearchIncludes(searchIncludes), m_Zone(std::move(zone)), m_Package(std::move(package))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	String m_RelativeBase;
+	std::unique_ptr<Expression> m_Path;
+	std::unique_ptr<Expression> m_Pattern;
+	std::unique_ptr<Expression> m_Name;
+	IncludeType m_Type;
+	bool m_SearchIncludes;
+	String m_Zone;
+	String m_Package;
+};
+
+class BreakpointExpression final : public DebuggableExpression
+{
+public:
+	BreakpointExpression(const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo)
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+};
+
+class TryExceptExpression final : public DebuggableExpression
+{
+public:
+	TryExceptExpression(std::unique_ptr<Expression> tryBody, std::unique_ptr<Expression> exceptBody, const DebugInfo& debugInfo = DebugInfo())
+		: DebuggableExpression(debugInfo), m_TryBody(std::move(tryBody)), m_ExceptBody(std::move(exceptBody))
+	{ }
+
+protected:
+	ExpressionResult DoEvaluate(ScriptFrame& frame, DebugHint *dhint) const override;
+
+private:
+	std::unique_ptr<Expression> m_TryBody;
+	std::unique_ptr<Expression> m_ExceptBody;
+};
+
+}
+
+#endif /* EXPRESSION_H */