Merge pull request #3699 from ethereum/interfaceExternalVisibility

Defaults to external visibility for interfaces.

libsolidity/analysis/StaticAnalyzer.cpp

@@ -50,6 +50,16 @@ void StaticAnalyzer::endVisit(ContractDefinition const&)
 
 bool StaticAnalyzer::visit(FunctionDefinition const& _function)
 {
+	const bool isInterface = m_currentContract->contractKind() == ContractDefinition::ContractKind::Interface;
+
+	if (_function.noVisibilitySpecified())
+		m_errorReporter.warning(
+			_function.location(),
+			"No visibility specified. Defaulting to \"" +
+			Declaration::visibilityToString(_function.visibility()) +
+			"\". " +
+			(isInterface ? "In interfaces it defaults to external." : "")
+		);
 	if (_function.isImplemented())
 		m_currentFunction = &_function;
 	else

libsolidity/analysis/SyntaxChecker.cpp

@@ -214,18 +214,9 @@ bool SyntaxChecker::visit(FunctionDefinition const& _function)
 {
 	bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
 
-	if (_function.noVisibilitySpecified())
+	if (v050 && _function.noVisibilitySpecified())
-	{
+		m_errorReporter.syntaxError(_function.location(), "No visibility specified.");
-		if (v050)
+			
-			m_errorReporter.syntaxError(_function.location(), "No visibility specified.");
-		else
-			m_errorReporter.warning(
-				_function.location(),
-				"No visibility specified. Defaulting to \"" +
-				Declaration::visibilityToString(_function.visibility()) +
-				"\"."
-			);
-	}
 	return true;
 }
 

test/libsolidity/SolidityNameAndTypeResolution.cpp

@@ -6429,54 +6429,6 @@ BOOST_AUTO_TEST_CASE(interface_function_bodies)
 	CHECK_ERROR(text, TypeError, "Functions in interfaces cannot have an implementation");
 }
 
-BOOST_AUTO_TEST_CASE(interface_function_external)
-{
-	char const* text = R"(
-		pragma experimental "v0.5.0";
-		interface I {
-			function f() external;
-		}
-	)";
-	CHECK_SUCCESS(text);
-}
-
-BOOST_AUTO_TEST_CASE(interface_function_public)
-{
-	char const* text = R"(
-		interface I {
-			function f() public;
-		}
-	)";
-	CHECK_WARNING(text, "Functions in interfaces should be declared external.");
-	text = R"(
-		pragma experimental "v0.5.0";
-		interface I {
-			function f() public;
-		}
-	)";
-	CHECK_ERROR(text, TypeError, "Functions in interfaces must be declared external.");
-}
-
-BOOST_AUTO_TEST_CASE(interface_function_internal)
-{
-	char const* text = R"(
-		interface I {
-			function f() internal;
-		}
-	)";
-	CHECK_ERROR(text, TypeError, "Functions in interfaces cannot be internal or private.");
-}
-
-BOOST_AUTO_TEST_CASE(interface_function_private)
-{
-	char const* text = R"(
-		interface I {
-			function f() private;
-		}
-	)";
-	CHECK_ERROR(text, TypeError, "Functions in interfaces cannot be internal or private.");
-}
-
 BOOST_AUTO_TEST_CASE(interface_events)
 {
 	char const* text = R"(

test/libsolidity/syntaxTests/visibility/interface/function_default.sol

@@ -0,0 +1,6 @@
+interface I {
+	function f();
+}
+// ----
+// Warning: Functions in interfaces should be declared external.
+// Warning: No visibility specified. Defaulting to "public". In interfaces it defaults to external.

test/libsolidity/syntaxTests/visibility/interface/function_default050.sol

@@ -0,0 +1,7 @@
+pragma experimental "v0.5.0";
+interface I {
+	function f();
+}
+// ----
+// SyntaxError: No visibility specified.
+// TypeError: Functions in interfaces must be declared external.

test/libsolidity/syntaxTests/visibility/interface/function_external050.sol

@@ -0,0 +1,5 @@
+pragma experimental "v0.5.0";
+interface I {
+	function f() external;
+}
+// ----

test/libsolidity/syntaxTests/visibility/interface/function_internal.sol

@@ -0,0 +1,5 @@
+interface I {
+	function f() internal;
+}
+// ----
+// TypeError: Functions in interfaces cannot be internal or private.

test/libsolidity/syntaxTests/visibility/interface/function_private.sol

@@ -0,0 +1,5 @@
+interface I {
+	function f() private;
+}
+// ----
+// TypeError: Functions in interfaces cannot be internal or private.

test/libsolidity/syntaxTests/visibility/interface/function_public.sol

@@ -0,0 +1,5 @@
+interface I {
+	function f() public;
+}
+// ----
+// Warning: Functions in interfaces should be declared external.

test/libsolidity/syntaxTests/visibility/interface/function_public050.sol

@@ -0,0 +1,6 @@
+pragma experimental "v0.5.0";
+interface I {
+	function f() public;
+}
+// ----
+// TypeError: Functions in interfaces must be declared external.