Merge pull request #345 from VoR0220/develop

Inline Arrays

docs/frequently-asked-questions.rst

@@ -317,7 +317,8 @@ by `msg.data`.
 Can state variables be initialized in-line?
 ===========================================
 
-Yes, this is possible for most types (even for structs), but not for arrays.
+Yes, this is possible for all types (even for structs). However, for arrays it 
+should be noted that you must declare them as static memory arrays.
 
 Examples::
 
@@ -325,6 +326,7 @@ Examples::
         struct S { uint a; uint b; }
         S public x = S(1, 2);
         string name = "Ada";
+        string[4] memory AdaArr = ["This", "is", "an", "array"];  
     }
     contract D {
         C c = new C();

libsolidity/analysis/TypeChecker.cpp

@@ -783,10 +783,12 @@ bool TypeChecker::visit(Assignment const& _assignment)
 bool TypeChecker::visit(TupleExpression const& _tuple)
 {
 	vector<ASTPointer<Expression>> const& components = _tuple.components();
-	solAssert(!_tuple.isInlineArray(), "Tuple type not properly declared");
 	TypePointers types;
+
 	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)
 			{
@@ -804,6 +806,7 @@ bool TypeChecker::visit(TupleExpression const& _tuple)
 	}
 	else
 	{
+		TypePointer inlineArrayType;
 		for (size_t i = 0; i < components.size(); ++i)
 		{
 			// Outside of an lvalue-context, the only situation where a component can be empty is (x,).
@@ -813,18 +816,34 @@ bool TypeChecker::visit(TupleExpression const& _tuple)
 			{
 				components[i]->accept(*this);
 				types.push_back(type(*components[i]));
+				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)
+		if (_tuple.isInlineArray())
-			_tuple.annotation().type = type(*components[0]);
+		{
+			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])
+			if (components.size() == 1)
-				types.pop_back();
+				_tuple.annotation().type = type(*components[0]);
-			_tuple.annotation().type = make_shared<TupleType>(types);
+			else
+			{
+				if (components.size() == 2 && !components[1])
+					types.pop_back();
+				_tuple.annotation().type = make_shared<TupleType>(types);
+			}
 		}
+
 	}
 	return false;
 }

libsolidity/codegen/ExpressionCompiler.cpp

@@ -219,25 +219,46 @@ bool ExpressionCompiler::visit(Assignment const& _assignment)
 
 bool ExpressionCompiler::visit(TupleExpression const& _tuple)
 {
-	vector<unique_ptr<LValue>> lvalues;
+	if (_tuple.isInlineArray())
-	for (auto const& component: _tuple.components())
+	{
-		if (component)
+		ArrayType const& arrayType = dynamic_cast<ArrayType const&>(*_tuple.annotation().type);
+		
+		solAssert(!arrayType.isDynamicallySized(), "Cannot create dynamically sized inline array.");
+		m_context << max(u256(32u), arrayType.memorySize());
+		utils().allocateMemory();
+		m_context << eth::Instruction::DUP1;
+	
+		for (auto const& component: _tuple.components())
 		{
 			component->accept(*this);
-			if (_tuple.annotation().lValueRequested)
+			utils().convertType(*component->annotation().type, *arrayType.baseType(), true);
-			{
+			utils().storeInMemoryDynamic(*arrayType.baseType(), true);				
-				solAssert(!!m_currentLValue, "");
-				lvalues.push_back(move(m_currentLValue));
-			}
 		}
-		else if (_tuple.annotation().lValueRequested)
+		
-			lvalues.push_back(unique_ptr<LValue>());
+		m_context << eth::Instruction::POP;
-	if (_tuple.annotation().lValueRequested)
+	}
+	else
 	{
-		if (_tuple.components().size() == 1)
+		vector<unique_ptr<LValue>> lvalues;
-			m_currentLValue = move(lvalues[0]);
+		for (auto const& component: _tuple.components())
-		else
+			if (component)
-			m_currentLValue.reset(new TupleObject(m_context, move(lvalues)));
+			{
+				component->accept(*this);
+				if (_tuple.annotation().lValueRequested)
+				{
+					solAssert(!!m_currentLValue, "");
+					lvalues.push_back(move(m_currentLValue));
+				}
+			}
+			else if (_tuple.annotation().lValueRequested)
+				lvalues.push_back(unique_ptr<LValue>());
+		if (_tuple.annotation().lValueRequested)
+		{
+			if (_tuple.components().size() == 1)
+				m_currentLValue = move(lvalues[0]);
+			else
+				m_currentLValue.reset(new TupleObject(m_context, move(lvalues)));
+		}
 	}
 	return false;
 }
@@ -774,7 +795,6 @@ bool ExpressionCompiler::visit(NewExpression const&)
 void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
 {
 	CompilerContext::LocationSetter locationSetter(m_context, _memberAccess);
-
 	// Check whether the member is a bound function.
 	ASTString const& member = _memberAccess.memberName();
 	if (auto funType = dynamic_cast<FunctionType const*>(_memberAccess.annotation().type.get()))
@@ -1123,6 +1143,7 @@ void ExpressionCompiler::endVisit(Literal const& _literal)
 {
 	CompilerContext::LocationSetter locationSetter(m_context, _literal);
 	TypePointer type = _literal.annotation().type;
+	
 	switch (type->category())
 	{
 	case Type::Category::IntegerConstant:

test/libsolidity/SolidityEndToEndTest.cpp

@@ -6107,6 +6107,119 @@ BOOST_AUTO_TEST_CASE(bound_function_to_string)
 	BOOST_CHECK(callContractFunction("g()") == encodeArgs(u256(3)));
 }
 
+BOOST_AUTO_TEST_CASE(inline_array_storage_to_memory_conversion_strings)
+{
+	char const* sourceCode = R"(
+		contract C {
+			string s = "doh";
+			function f() returns (string, string) {
+				string memory t = "ray";
+				string[3] memory x = [s, t, "mi"];
+				return (x[1], x[2]);
+			}
+		}
+	)";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callContractFunction("f()") == encodeArgs(u256(0x40), u256(0x80), u256(3), string("ray"), u256(2), string("mi")));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_strings_from_document)
+{
+	char const* sourceCode = R"(
+		contract C {
+			function f(uint i) returns (string) {
+				string[4] memory x = ["This", "is", "an", "array"];
+				return (x[i]);
+			}
+		}
+	)";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callContractFunction("f(uint256)", u256(0)) == encodeArgs(u256(0x20), u256(4), string("This")));
+	BOOST_CHECK(callContractFunction("f(uint256)", u256(1)) == encodeArgs(u256(0x20), u256(2), string("is")));
+	BOOST_CHECK(callContractFunction("f(uint256)", u256(2)) == encodeArgs(u256(0x20), u256(2), string("an")));
+	BOOST_CHECK(callContractFunction("f(uint256)", u256(3)) == encodeArgs(u256(0x20), u256(5), string("array")));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_storage_to_memory_conversion_ints)
+{
+	char const* sourceCode = R"(
+		contract C {
+			function f() returns (uint x, uint y) {
+				x = 3;
+				y = 6;
+				uint[2] memory z = [x, y];
+				return (z[0], z[1]);
+			}
+		}
+	)";
+	compileAndRun(sourceCode, 0, "C");
+	BOOST_CHECK(callContractFunction("f()") == encodeArgs(3, 6));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_index_access_ints)
+{
+	char const* sourceCode = R"(
+		contract C {
+			function f() returns (uint) {
+				return ([1, 2, 3, 4][2]);
+			}
+		}
+	)";
+	compileAndRun(sourceCode, 0, "C");
+	BOOST_CHECK(callContractFunction("f()") == encodeArgs(3));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_index_access_strings)
+{
+	char const* sourceCode = R"(
+		contract C {
+			string public tester;
+			function f() returns (string) {
+				return (["abc", "def", "g"][0]);
+			}
+			function test() {
+				tester = f();
+			}
+		}
+	)";
+	compileAndRun(sourceCode, 0, "C");
+	BOOST_CHECK(callContractFunction("test()") == encodeArgs());
+	BOOST_CHECK(callContractFunction("tester()") == encodeArgs(u256(0x20), u256(3), string("abc")));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_return)
+{
+	char const* sourceCode = R"(
+		contract C {
+			uint8[] tester; 
+			function f() returns (uint8[5]) {
+				return ([1,2,3,4,5]);
+			}
+			function test() returns (uint8, uint8, uint8, uint8, uint8) {
+				tester = f(); 
+				return (tester[0], tester[1], tester[2], tester[3], tester[4]);
+			}
+			
+		}
+	)";
+	compileAndRun(sourceCode, 0, "C");
+	BOOST_CHECK(callContractFunction("f()") == encodeArgs(1, 2, 3, 4, 5));
+}
+
+BOOST_AUTO_TEST_CASE(inline_long_string_return)
+{
+		char const* sourceCode = R"(
+		contract C { 
+			function f() returns (string) {
+				return (["somethingShort", "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678900123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"][1]);
+			}
+		}
+	)";
+	
+	string strLong = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678900123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789001234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890";
+	compileAndRun(sourceCode, 0, "C");
+	BOOST_CHECK(callContractFunction("f()") == encodeDyn(strLong));
+}
 BOOST_AUTO_TEST_SUITE_END()
 
 }

test/libsolidity/SolidityNameAndTypeResolution.cpp

@@ -2769,15 +2769,98 @@ BOOST_AUTO_TEST_CASE(function_overload_array_type)
 	BOOST_CHECK(success(text));
 }
 
-/*BOOST_AUTO_TEST_CASE(inline_array_declaration_and_passing)
+BOOST_AUTO_TEST_CASE(inline_array_declaration_and_passing_implicit_conversion)
+{
+	char const* text = R"(
+			contract C {
+				function f() returns (uint) {
+					uint8 x = 7;
+					uint16 y = 8;
+					uint32 z = 9;
+					uint32[3] memory ending = [x, y, z]; 
+					return (ending[1]);                   
+				}
+			}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_declaration_and_passing_implicit_conversion_strings)
 {
 	char const* text = R"(
 		contract C {
-			uint[] a;
+			function f() returns (string) {
-            function f() returns (uint, uint) {
+				string memory x = "Hello";
-                a = [1,2,3];
+				string memory y = "World";
-                return (a[3], [3,4][0]);
+				string[2] memory z = [x, y];
-            }
+				return (z[0]);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_declaration_const_int_conversion)
+{
+	char const* text = R"(
+		contract C {
+			function f() returns (uint) {
+				uint8[4] memory z = [1,2,3,5];
+				return (z[0]);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_declaration_const_string_conversion)
+{
+	char const* text = R"(
+		contract C {
+			function f() returns (string) {
+				string[2] memory z = ["Hello", "World"];
+				return (z[0]);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_declaration_no_type)
+{
+	char const* text = R"(
+		contract C {
+			function f() returns (uint) {
+				return ([4,5,6][1]);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_array_declaration_no_type_strings)
+{
+	char const* text = R"(
+		contract C {
+			function f() returns (string) {
+				return (["foo", "man", "choo"][1]);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(inline_struct_declaration_arrays)
+{
+	char const* text = R"(
+		contract C {
+			struct S {
+				uint a;
+				string b;
+			}
+			function f() {
+				S[2] memory x = [S({a: 1, b: "fish"}), S({a: 2, b: "fish"})];
+			}
 		}
 	)";
 	BOOST_CHECK(success(text));
@@ -2788,12 +2871,37 @@ BOOST_AUTO_TEST_CASE(invalid_types_in_inline_array)
 	char const* text = R"(
 		contract C {
 			function f() {
-				uint[] x = [45, "foo", true];
+				uint[3] x = [45, 'foo', true];
 			}
 		}
 	)";
 	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
-}*/
+}
+
+BOOST_AUTO_TEST_CASE(dynamic_inline_array)
+{
+	char const* text = R"(
+		contract C {
+			function f() {
+				uint8[4][4] memory dyn = [[1, 2, 3, 4], [2, 3, 4, 5], [3, 4, 5, 6], [4, 5, 6, 7]];
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(lvalues_as_inline_array)
+{
+	char const* text = R"(
+		contract C {
+			function f() {
+				[1, 2, 3]++;
+				[1, 2, 3] = [4, 5, 6];
+			}
+		}
+	)";
+	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
+}
 
 BOOST_AUTO_TEST_SUITE_END()