From 4fa0326813b4fc9d3c85cb9235f42cf22beead72 Mon Sep 17 00:00:00 2001
From: Lu Guanqun <guanqun.lu@gmail.com>
Date: Tue, 22 Dec 2015 16:44:51 +0000
Subject: [PATCH] [cond-expr] add an AST node

---
 libsolidity/ast/AST.h        | 27 +++++++++++++++++++++++++++
 libsolidity/ast/ASTForward.h |  1 +
 libsolidity/ast/AST_accept.h | 22 ++++++++++++++++++++++
 3 files changed, 50 insertions(+)

diff --git a/libsolidity/ast/AST.h b/libsolidity/ast/AST.h
index 4baf95d30..e10634676 100644
--- a/libsolidity/ast/AST.h
+++ b/libsolidity/ast/AST.h
@@ -1119,6 +1119,33 @@ public:
 	ExpressionAnnotation& annotation() const override;
 };
 
+class Conditional: public Expression
+{
+public:
+	Conditional(
+		SourceLocation const& _location,
+		ASTPointer<Expression> const& _condition,
+		ASTPointer<Expression> const& _trueExpression,
+		ASTPointer<Expression> const& _falseExpression
+	):
+		Expression(_location),
+		m_condition(_condition),
+		m_trueExpression(_trueExpression),
+		m_falseExpression(_falseExpression)
+	{}
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+
+	Expression const& condition() const { return *m_condition; }
+	Expression const& trueExpression() const { return *m_trueExpression; }
+	Expression const& falseExpression() const { return *m_falseExpression; }
+
+private:
+	ASTPointer<Expression> m_condition;
+	ASTPointer<Expression> m_trueExpression;
+	ASTPointer<Expression> m_falseExpression;
+};
+
 /// Assignment, can also be a compound assignment.
 /// Examples: (a = 7 + 8) or (a *= 2)
 class Assignment: public Expression
diff --git a/libsolidity/ast/ASTForward.h b/libsolidity/ast/ASTForward.h
index 6aaa77ce0..dad2b2e2b 100644
--- a/libsolidity/ast/ASTForward.h
+++ b/libsolidity/ast/ASTForward.h
@@ -69,6 +69,7 @@ class Throw;
 class VariableDeclarationStatement;
 class ExpressionStatement;
 class Expression;
+class Conditional;
 class Assignment;
 class TupleExpression;
 class UnaryOperation;
diff --git a/libsolidity/ast/AST_accept.h b/libsolidity/ast/AST_accept.h
index 61370c557..dee9d5b14 100644
--- a/libsolidity/ast/AST_accept.h
+++ b/libsolidity/ast/AST_accept.h
@@ -551,6 +551,28 @@ void VariableDeclarationStatement::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void Conditional::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+	{
+		m_condition->accept(_visitor);
+		m_trueExpression->accept(_visitor);
+		m_falseExpression->accept(_visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
+void Conditional::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+	{
+		m_condition->accept(_visitor);
+		m_trueExpression->accept(_visitor);
+		m_falseExpression->accept(_visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
 void Assignment::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))