Merge pull request #7421 from ethereum/develop

Merge develop into develop_060

docs/yul.rst

@@ -244,14 +244,14 @@ We will use a destructuring notation for the AST nodes.
                 G1, L1, mode
     E(G, L, FunctionDefinition) =
         G, L, regular
-    E(G, L, <let var1, ..., varn := rhs>: VariableDeclaration) =
-        E(G, L, <var1, ..., varn := rhs>: Assignment)
-    E(G, L, <let var1, ..., varn>: VariableDeclaration) =
-        let L1 be a copy of L where L1[$vari] = 0 for i = 1, ..., n
+    E(G, L, <let var_1, ..., var_n := rhs>: VariableDeclaration) =
+        E(G, L, <var_1, ..., var_n := rhs>: Assignment)
+    E(G, L, <let var_1, ..., var_n>: VariableDeclaration) =
+        let L1 be a copy of L where L1[$var_i] = 0 for i = 1, ..., n
         G, L1, regular
-    E(G, L, <var1, ..., varn := rhs>: Assignment) =
+    E(G, L, <var_1, ..., var_n := rhs>: Assignment) =
         let G1, L1, v1, ..., vn = E(G, L, rhs)
-        let L2 be a copy of L1 where L2[$vari] = vi for i = 1, ..., n
+        let L2 be a copy of L1 where L2[$var_i] = vi for i = 1, ..., n
         G, L2, regular
     E(G, L, <for { i1, ..., in } condition post body>: ForLoop) =
         if n >= 1:

scripts/codespell_whitelist.txt

@@ -9,3 +9,4 @@ ba
 fo
 compilability
 errorstring
+hist

test/ExecutionFramework.h

@@ -92,6 +92,12 @@ public:
 		return callFallbackWithValue(0);
 	}
 
+	bytes const& callLowLevel(bytes const& _data, u256 const& _value)
+	{
+		sendMessage(_data, false, _value);
+		return m_output;
+	}
+
 	bytes const& callContractFunctionWithValueNoEncoding(std::string _sig, u256 const& _value, bytes const& _arguments)
 	{
 		FixedHash<4> hash(dev::keccak256(_sig));

test/compilationTests/corion/provider.sol

@@ -149,7 +149,7 @@ contract provider is module, safeMath, announcementTypes {
     }
     function getUserDetails(address payable addr, uint256 schellingRound) public view returns (address ProviderAddress, uint256 ProviderHeight, uint256 ConnectedOn, uint256 value) {
         /*
-            Collecting the datas of the client.
+            Collecting the data of the client.
 
             @addr               Address of the client.
             @schellingRound     Number of the schelling round. If it is not defined then the current one.
@@ -272,7 +272,7 @@ contract provider is module, safeMath, announcementTypes {
     }
     function setProviderDetails(address payable addr, string calldata website, string calldata country, string calldata info, uint8 rate, address payable admin) isReady external {
         /*
-            Modifying the datas of the provider.
+            Modifying the data of the provider.
             This can only be invited by the provider’s admin.
             The emission rate is only valid for the next schelling round for this one it is not.
             The admin can only be changed by the address of the provider.
@@ -323,7 +323,7 @@ contract provider is module, safeMath, announcementTypes {
     }
     function getProviderDetails(address payable addr, uint256 height) public view returns (uint8 rate, bool isForRent, uint256 clientsCount, bool priv, bool getInterest, bool valid) {
         /*
-            Asking for the datas of the provider.
+            Asking for the data of the provider.
             In case the height is unknown then the system will use the last known height.
 
             @addr           Address of the provider

test/libsolidity/SemanticTest.cpp

@@ -98,11 +98,13 @@ TestCase::TestResult SemanticTest::run(ostream& _stream, string const& _linePref
 			}
 			else
 			{
-				bytes output = callContractFunctionWithValueNoEncoding(
-					test.call().signature,
-					test.call().value,
-					test.call().arguments.rawBytes()
-				);
+				bytes output = test.call().useCallWithoutSignature ?
+					callLowLevel(test.call().arguments.rawBytes(), test.call().value) :
+					callContractFunctionWithValueNoEncoding(
+						test.call().signature,
+						test.call().value,
+						test.call().arguments.rawBytes()
+					);
 
 				if ((m_transactionSuccessful == test.call().expectations.failure) || (output != test.call().expectations.rawBytes()))
 					success = false;

test/libsolidity/SolidityEndToEndTest.cpp

@@ -2514,23 +2514,6 @@ BOOST_AUTO_TEST_CASE(super_alone)
 	)
 }
 
-BOOST_AUTO_TEST_CASE(fallback_function)
-{
-	char const* sourceCode = R"(
-		contract A {
-			uint data;
-			function() external { data = 1; }
-			function getData() public returns (uint r) { return data; }
-		}
-	)";
-	ALSO_VIA_YUL(
-		compileAndRun(sourceCode);
-		ABI_CHECK(callContractFunction("getData()"), encodeArgs(0));
-		ABI_CHECK(callContractFunction(""), encodeArgs());
-		ABI_CHECK(callContractFunction("getData()"), encodeArgs(1));
-	)
-}
-
 BOOST_AUTO_TEST_CASE(inherited_fallback_function)
 {
 	char const* sourceCode = R"(

test/libsolidity/semanticTests/smoke/fallback.sol

@@ -0,0 +1,23 @@
+contract A {
+    uint public data;
+    uint public balance;
+    bytes public externalData;
+    function() external payable {
+        data += 1;
+        balance = msg.value;
+        externalData = msg.data;
+    }
+}
+// ----
+// data() -> 0
+// ()
+// data() -> 1
+// (): hex"42ef"
+// data() -> 2
+// externalData() -> 0x20, 2, left(0x42ef)
+// balance() -> 0
+// (), 1 ether
+// balance() -> 1
+// (), 2 ether: hex"fefe"
+// balance() -> 2
+// externalData() -> 0x20, 2, left(0xfefe)

test/libsolidity/util/SoltestTypes.h

@@ -262,6 +262,9 @@ struct FunctionCall
 	DisplayMode displayMode = DisplayMode::SingleLine;
 	/// Marks this function call as the constructor.
 	bool isConstructor = false;
+	/// If this function call's signature has no name and no arguments,
+	/// a low-level call with unstructured calldata will be issued.
+	bool useCallWithoutSignature = false;
 	/// Marks this function call as "short-handed", meaning
 	/// no `->` declared.
 	bool omitsArrow = true;

test/libsolidity/util/TestFileParser.cpp

@@ -75,7 +75,7 @@ vector<dev::solidity::test::FunctionCall> TestFileParser::parseFunctionCalls(siz
 
 				try
 				{
-					call.signature = parseFunctionSignature();
+					tie(call.signature, call.useCallWithoutSignature) = parseFunctionSignature();
 					if (accept(Token::Comma, true))
 						call.value = parseFunctionCallValue();
 					if (accept(Token::Colon, true))
@@ -148,10 +148,17 @@ bool TestFileParser::expect(soltest::Token _token, bool const _advance)
 	return true;
 }
 
-string TestFileParser::parseFunctionSignature()
+pair<string, bool> TestFileParser::parseFunctionSignature()
 {
-	string signature = m_scanner.currentLiteral();
-	expect(Token::Identifier);
+	string signature;
+	bool hasName = false;
+
+	if (accept(Token::Identifier, false))
+	{
+		hasName = true;
+		signature = m_scanner.currentLiteral();
+		expect(Token::Identifier);
+	}
 
 	signature += formatToken(Token::LParen);
 	expect(Token::LParen);
@@ -169,11 +176,15 @@ string TestFileParser::parseFunctionSignature()
 	if (accept(Token::Arrow, true))
 		throw Error(Error::Type::ParserError, "Invalid signature detected: " + signature);
 
-	signature += parameters;
+	if (!hasName && !parameters.empty())
+		throw Error(Error::Type::ParserError, "Signatures without a name cannot have parameters: " + signature);
+	else
+		signature += parameters;
 
 	expect(Token::RParen);
 	signature += formatToken(Token::RParen);
-	return signature;
+
+	return {signature, !hasName};
 }
 
 u256 TestFileParser::parseFunctionCallValue()

test/libsolidity/util/TestFileParser.h

@@ -46,6 +46,8 @@ namespace test
  * // -> 2, 3
  * // h(uint256), 1 ether: 42
  * // -> FAILURE                # If REVERT or other EVM failure was detected #
+ * // ()                        # Call fallback function #
+ * // (), 1 ether               # Call ether function #
  * ...
  */
 class TestFileParser
@@ -128,8 +130,10 @@ private:
 	bool accept(soltest::Token _token, bool const _expect = false);
 	bool expect(soltest::Token _token, bool const _advance = true);
 
-	/// Parses a function call signature in the form of f(uint256, ...).
-	std::string parseFunctionSignature();
+	/// Parses a function call signature in the form of `f(uint256, ...)` and
+	/// returns the signature and a flag that indicates if the function name was
+	/// empty. If so, the signature is not allowed to define any parameters.
+	std::pair<std::string, bool> parseFunctionSignature();
 
 	/// Parses the optional ether value that can be passed alongside the
 	/// function call arguments. Throws an InvalidEtherValueEncoding exception