pragma abicoder v2; contract C { type UnsignedNumber is uint256; enum Enum { First, Second, Third } struct Struct { UnsignedNumber[] dynamicArray; uint256 justAnInt; string name; bytes someBytes; Enum theEnum; } function callMeMaybe(Struct calldata _data, int256 _intVal, string memory _nameVal) external pure { assert(_data.dynamicArray.length == 3); assert(UnsignedNumber.unwrap(_data.dynamicArray[0]) == 0); assert(UnsignedNumber.unwrap(_data.dynamicArray[1]) == 1); assert(UnsignedNumber.unwrap(_data.dynamicArray[2]) == 2); assert(_data.justAnInt == 6); assert(keccak256(bytes(_data.name)) == keccak256("StructName")); assert(keccak256(_data.someBytes) == keccak256(bytes("1234"))); assert(_data.theEnum == Enum.Second); assert(_intVal == 5); assert(keccak256(bytes(_nameVal)) == keccak256("TestName")); } function callExternal() public returns (bool) { Struct memory structToSend; structToSend.dynamicArray = new UnsignedNumber[](3); structToSend.dynamicArray[0] = UnsignedNumber.wrap(0); structToSend.dynamicArray[1] = UnsignedNumber.wrap(1); structToSend.dynamicArray[2] = UnsignedNumber.wrap(2); structToSend.justAnInt = 6; structToSend.name = "StructName"; structToSend.someBytes = bytes("1234"); structToSend.theEnum = Enum.Second; (bool success,) = address(this).call(abi.encodeCall(this.callMeMaybe, ( structToSend, 5, "TestName" ))); return success; } } // ==== // compileViaYul: also // ---- // callExternal() -> true