Merge pull request #5451 from ethereum/bound_function_tests

Add assert and tests for bound functions

test/libsolidity/SolidityEndToEndTest.cpp

@@ -9388,6 +9388,25 @@ BOOST_AUTO_TEST_CASE(using_for_by_name)
 	ABI_CHECK(callContractFunction("x()"), encodeArgs(u256(6 * 7)));
 }
 
+BOOST_AUTO_TEST_CASE(bound_function_in_function)
+{
+	char const* sourceCode = R"(
+		library L {
+			function g(function() internal returns (uint) _t) internal returns (uint) { return _t(); }
+		}
+		contract C {
+			using L for *;
+			function f() public returns (uint) {
+				return t.g();
+			}
+			function t() public pure returns (uint)  { return 7; }
+		}
+	)";
+	compileAndRun(sourceCode, 0, "L");
+	compileAndRun(sourceCode, 0, "C", bytes(), map<string, Address>{{"L", m_contractAddress}});
+	ABI_CHECK(callContractFunction("f()"), encodeArgs(u256(7)));
+}
+
 BOOST_AUTO_TEST_CASE(bound_function_in_var)
 {
 	char const* sourceCode = R"(

test/libsolidity/syntaxTests/bound/bound_all.sol

@@ -0,0 +1,10 @@
+library L {
+	function g(function() internal returns (uint) _t) internal returns (uint) { return _t(); }
+}
+contract C {
+	using L for *;
+	function f() public returns (uint) {
+		return t.g();
+	}
+	function t() public pure returns (uint)  { return 7; }
+}

test/libsolidity/syntaxTests/bound/bound_call.sol

@@ -0,0 +1,7 @@
+library D { function double(uint self) internal pure returns (uint) { return 2*self; } }
+contract C {
+	using D for uint;
+	function f(uint a) public pure {
+		a.double();
+	}
+}

test/libsolidity/syntaxTests/bound/bound_no_call.sol

@@ -0,0 +1,7 @@
+library D { function double(uint self) public pure returns (uint) { return 2*self; } }
+contract C {
+	using D for uint;
+	function f(uint a) public pure {
+		a.double;
+	}
+}