Explicit conversion from int to Enum

libsolidity/Types.cpp

@@ -156,7 +156,9 @@ bool IntegerType::isExplicitlyConvertibleTo(Type const& _convertTo) const
 		StaticStringType const& convertTo = dynamic_cast<StaticStringType const&>(_convertTo);
 		return isHash() && (m_bits == convertTo.getNumBytes() * 8);
 	}
-	return _convertTo.getCategory() == getCategory() || _convertTo.getCategory() == Category::Contract;
+	return _convertTo.getCategory() == getCategory() ||
+		   _convertTo.getCategory() == Category::Contract ||
+		   _convertTo.getCategory() == Category::Enum;
 }
 
 TypePointer IntegerType::unaryOperatorResult(Token::Value _operator) const

test/SolidityNameAndTypeResolution.cpp

@@ -1039,6 +1039,23 @@ BOOST_AUTO_TEST_CASE(enum_explicit_conversion_is_okay)
 	BOOST_CHECK_NO_THROW(parseTextAndResolveNamesWithChecks(text));
 }
 
+BOOST_AUTO_TEST_CASE(int_to_enum_explicit_conversion_is_okay)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit };
+				function test()
+				{
+					a = 2;
+					b = ActionChoices(a);
+				}
+				uint256 a;
+				ActionChoices b;
+			}
+	)";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNamesWithChecks(text));
+}
+
 BOOST_AUTO_TEST_CASE(enum_implicit_conversion_is_not_okay)
 {
 	char const* text = R"(