final changes to typechecker, the expression compiler, and a couple more tests for good measure

2 files changed, 32 insertions, 23 deletions

diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index 20b3ad6c..75a9632e 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -781,10 +781,12 @@ bool TypeChecker::visit(TupleExpression const& _tuple)
 {
 	vector<ASTPointer<Expression>> const& components = _tuple.components();
 	TypePointers types;
-	TypePointer internalArrayType;
-	bool isArray = _tuple.isInlineArray();
+	TypePointer inlineArrayType;
+
 	if (_tuple.annotation().lValueRequested)
 	{
+		if (_tuple.isInlineArray())
+			fatalTypeError(_tuple.location(), "Inline array type cannot be declared as LValue.");
 		for (auto const& component: components)
 			if (component)
 			{
@@ -811,26 +813,34 @@ bool TypeChecker::visit(TupleExpression const& _tuple)
 			{
 				components[i]->accept(*this);
 				types.push_back(type(*components[i]));
-				if (i == 0 && isArray)
-					internalArrayType = types[i]->mobileType();
-				else if (isArray && internalArrayType && types[i]->mobileType())
-					internalArrayType = Type::commonType(internalArrayType, types[i]->mobileType());
+				if (_tuple.isInlineArray())
+					solAssert(!!types[i], "Inline array cannot have empty components");
+				if (i == 0 && _tuple.isInlineArray())
+					inlineArrayType = types[i]->mobileType();
+				else if (_tuple.isInlineArray() && inlineArrayType)
+					inlineArrayType = Type::commonType(inlineArrayType, types[i]->mobileType());
 			}
 			else
 				types.push_back(TypePointer());
 		}
-		if (components.size() == 1 && !isArray)
-			_tuple.annotation().type = type(*components[0]);
-		else if (!internalArrayType && isArray) 
-			fatalTypeError(_tuple.location(), "Unable to deduce common type for array elements.");
-		else if (isArray)
-			_tuple.annotation().type = make_shared<ArrayType>(DataLocation::Memory, internalArrayType, types.size());
+		if (_tuple.isInlineArray())
+		{
+			if (!inlineArrayType) 
+				fatalTypeError(_tuple.location(), "Unable to deduce common type for array elements.");
+			_tuple.annotation().type = make_shared<ArrayType>(DataLocation::Memory, inlineArrayType, types.size());
+		}
 		else
 		{
-			if (components.size() == 2 && !components[1])
-				types.pop_back();
-			_tuple.annotation().type = make_shared<TupleType>(types);
+			if (components.size() == 1)
+				_tuple.annotation().type = type(*components[0]);
+			else
+			{
+				if (components.size() == 2 && !components[1])
+					types.pop_back();
+				_tuple.annotation().type = make_shared<TupleType>(types);
+			}
 		}
+
 	}
 	return false;
 }
diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp
index c5f0f97e..f0dab41a 100644
--- a/libsolidity/codegen/ExpressionCompiler.cpp
+++ b/libsolidity/codegen/ExpressionCompiler.cpp
@@ -186,7 +186,7 @@ bool ExpressionCompiler::visit(Assignment const& _assignment)
 		_assignment.leftHandSide().annotation().type
 	);
 	utils().convertType(*_assignment.rightHandSide().annotation().type, *type);
-	
+
 	_assignment.leftHandSide().accept(*this);
 	solAssert(!!m_currentLValue, "LValue not retrieved.");
 
@@ -222,18 +222,17 @@ bool ExpressionCompiler::visit(TupleExpression const& _tuple)
 	if (_tuple.isInlineArray())
 	{
 		ArrayType const& arrayType = dynamic_cast<ArrayType const&>(*_tuple.annotation().type);
-		auto components = _tuple.components();
 		
+		solAssert(!arrayType.isDynamicallySized(), "Cannot create dynamically sized inline array.");
 		m_context << max(u256(32u), arrayType.memorySize());
 		utils().allocateMemory();
 		m_context << eth::Instruction::DUP1;
 	
-		for (unsigned i = 0; i < components.size(); ++i)
+		for (auto const& component: _tuple.components())
 		{
-			components[i]->accept(*this);
-			utils().convertType(*components[i]->annotation().type, *arrayType.baseType(), true);
-			components[i]->annotation().type = arrayType.baseType(); //force conversion
-			utils().storeInMemoryDynamic(*components[i]->annotation().type, true);				
+			component->accept(*this);
+			utils().convertType(*component->annotation().type, *arrayType.baseType(), true);
+			utils().storeInMemoryDynamic(*arrayType.baseType(), true);				
 		}
 		
 		m_context << eth::Instruction::POP;
@@ -1155,7 +1154,7 @@ void ExpressionCompiler::endVisit(Literal const& _literal)
 		break; // will be done during conversion
 	default:
 		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Only integer, boolean and string literals implemented for now."));
-	}	
+	}
 }
 
 void ExpressionCompiler::appendAndOrOperatorCode(BinaryOperation const& _binaryOperation)