More flexible array literals.

libsolidity/ast/Types.cpp

@@ -2565,8 +2565,26 @@ vector<tuple<string, Type const*>> UserDefinedValueType::makeStackItems() const
 
 BoolResult TupleType::isImplicitlyConvertibleTo(Type const& _other) const
 {
-	if (auto tupleType = dynamic_cast<TupleType const*>(&_other))
+	if (auto arrayType = dynamic_cast<ArrayType const*>(&_other))
 	{
+		if (!m_isArrayLiteral)
+			return false;
+
+		if (!(
+			arrayType->isDynamicallySized() ||
+			arrayType->length() == m_components.size()
+		))
+			return false;
+
+		for (Type const* t: m_components)
+			if (!t->isImplicitlyConvertibleTo(arrayType->baseType()))
+				return false;
+		return true;
+	}
+	else if (auto tupleType = dynamic_cast<TupleType const*>(&_other))
+	{
+		if (m_isArrayLiteral != tupleType->m_isArrayLiteral)
+			return false;
 		TypePointers const& targets = tupleType->components();
 		if (targets.empty())
 			return components().empty();
@@ -2585,19 +2603,20 @@ BoolResult TupleType::isImplicitlyConvertibleTo(Type const& _other) const
 
 string TupleType::richIdentifier() const
 {
-	return "t_tuple" + identifierList(components());
+	return (m_isArrayLiteral ? "t_arrayLiteral" : "t_tuple") + identifierList(components());
 }
 
 bool TupleType::operator==(Type const& _other) const
 {
 	if (auto tupleType = dynamic_cast<TupleType const*>(&_other))
-		return components() == tupleType->components();
+		return components() == tupleType->components() && m_isArrayLiteral == tupleType->m_isArrayLiteral;
 	else
 		return false;
 }
 
 string TupleType::toString(bool _short) const
 {
+	// TODO
 	if (components().empty())
 		return "tuple()";
 	string str = "tuple(";
@@ -2640,7 +2659,8 @@ Type const* TupleType::mobileType() const
 		else
 			mobiles.push_back(nullptr);
 	}
-	return TypeProvider::tuple(move(mobiles));
+	// TODO correct?
+	return TypeProvider::tuple(move(mobiles), m_isArrayLiteral);
 }
 
 FunctionType::FunctionType(FunctionDefinition const& _function, Kind _kind):

libsolidity/ast/Types.h

@@ -1136,7 +1136,10 @@ private:
 class TupleType: public CompositeType
 {
 public:
-	explicit TupleType(std::vector<Type const*> _types = {}): m_components(std::move(_types)) {}
+	explicit TupleType(std::vector<Type const*> _types = {}, bool _arrayLiteral = false):
+		m_components(std::move(_types)),
+		m_isArrayLiteral(_arrayLiteral)
+	{}
 
 	Category category() const override { return Category::Tuple; }
 
@@ -1150,6 +1153,7 @@ public:
 	bool hasSimpleZeroValueInMemory() const override { return false; }
 	Type const* mobileType() const override;
 
+	bool isArrayLiteral() const { return m_isArrayLiteral; }
 	std::vector<Type const*> const& components() const { return m_components; }
 
 protected:
@@ -1166,6 +1170,7 @@ protected:
 
 private:
 	std::vector<Type const*> const m_components;
+	bool const m_isArrayLiteral;
 };
 
 /**

libsolidity/codegen/YulUtilFunctions.cpp

@@ -3256,6 +3256,11 @@ string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
 		solAssert(_to.category() == Type::Category::Array, "");
 		return arrayConversionFunction(fromArrayType, dynamic_cast<ArrayType const&>(_to));
 	}
+	else if (auto tupleType = dynamic_cast<TupleType const*>(&_from))
+	{
+		if (tupleType->isArrayLiteral())
+			return arrayLiteralConversionFunction(*tupleType, dynamic_cast<ArrayType const&>(_to));
+	}
 
 	if (_from.sizeOnStack() != 1 || _to.sizeOnStack() != 1)
 		return conversionFunctionSpecial(_from, _to);
@@ -3418,10 +3423,8 @@ string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
 			break;
 		}
 		case Type::Category::Tuple:
-		{
-			solUnimplementedAssert(false, "Tuple conversion not implemented.");
+			solAssert(false, "");
 			break;
-		}
 		case Type::Category::TypeType:
 		{
 			TypeType const& typeType = dynamic_cast<decltype(typeType)>(_from);
@@ -3704,6 +3707,34 @@ string YulUtilFunctions::arrayConversionFunction(ArrayType const& _from, ArrayTy
 	});
 }
 
+string YulUtilFunctions::arrayLiteralConversionFunction(TupleType const& _from, ArrayType const& _to)
+{
+	solUnimplementedAssert(_to.dataStoredIn(DataLocation::Memory, "");
+
+	string functionName =
+		"convert_arrayliteral_" +
+		_from.identifier() +
+		"_to_" +
+		_to.identifier();
+
+	return m_functionCollector.createFunction(functionName, [&](vector<string>& _args, vector<string>& _ret) {
+		_args = _from.stackItems();
+		_ret = "converted";
+		Whiskers templ(R"(
+			// Copy the array to a free position in memory
+			converted := <allocate>(<length>)
+			<?dynamic>
+				mstore(converted, <length>)
+			</dynamic>
+			<#items>
+				mstore(<pos>, <var>)
+			</items>
+		)");
+		return templ.render();
+	});
+}
+
+
 string YulUtilFunctions::cleanupFunction(Type const& _type)
 {
 	if (auto userDefinedValueType = dynamic_cast<UserDefinedValueType const*>(&_type))

libsolidity/codegen/YulUtilFunctions.h

@@ -530,6 +530,8 @@ private:
 	/// Special case of conversion functions - handles all array conversions.
 	std::string arrayConversionFunction(ArrayType const& _from, ArrayType const& _to);
 
+	std::string arrayLiteralConversionFunction(TupleType const& _from, ArrayType const& _to);
+
 	/// Special case of conversionFunction - handles everything that does not
 	/// use exactly one variable to hold the value.
 	std::string conversionFunctionSpecial(Type const& _from, Type const& _to);