From f68c09272b5dfbcf9111c8a5e2c37267a5eafe60 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 2 May 2019 18:28:33 +0200
Subject: [PATCH] Simple tuple expressions.

---
 .../codegen/ir/IRGeneratorForStatements.cpp       | 15 +++++++++++++++
 libsolidity/codegen/ir/IRGeneratorForStatements.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
index 8425c591c..c31449239 100644
--- a/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+++ b/libsolidity/codegen/ir/IRGeneratorForStatements.cpp
@@ -131,6 +131,21 @@ bool IRGeneratorForStatements::visit(Assignment const& _assignment)
 	return false;
 }
 
+bool IRGeneratorForStatements::visit(TupleExpression const& _tuple)
+{
+	if (_tuple.isInlineArray())
+		solUnimplementedAssert(false, "");
+	else
+	{
+		solUnimplementedAssert(!_tuple.annotation().lValueRequested, "");
+		solUnimplementedAssert(_tuple.components().size() == 1, "");
+		solAssert(_tuple.components().front(), "");
+		_tuple.components().front()->accept(*this);
+		defineExpression(_tuple) << m_context.variable(*_tuple.components().front()) << "\n";
+	}
+	return false;
+}
+
 bool IRGeneratorForStatements::visit(ForStatement const& _for)
 {
 	m_code << "for {\n";
diff --git a/libsolidity/codegen/ir/IRGeneratorForStatements.h b/libsolidity/codegen/ir/IRGeneratorForStatements.h
index 586d5241b..b57ffa8e1 100644
--- a/libsolidity/codegen/ir/IRGeneratorForStatements.h
+++ b/libsolidity/codegen/ir/IRGeneratorForStatements.h
@@ -47,6 +47,7 @@ public:
 
 	void endVisit(VariableDeclarationStatement const& _variableDeclaration) override;
 	bool visit(Assignment const& _assignment) override;
+	bool visit(TupleExpression const& _tuple) override;
 	bool visit(ForStatement const& _forStatement) override;
 	bool visit(Continue const& _continueStatement) override;
 	bool visit(Break const& _breakStatement) override;