Removing clang flag that is unknown, fixing missing forward declare for struct on MSVC, and lastly casting the value of int found by clang

Author: LinuxDevon

CMakeLists.txt

@@ -65,9 +65,8 @@ endif()
 
 list(APPEND GCC_CLANG_COMPILE_FLAGS
     -Wall -Wextra -Wpedantic
-    -Warith-conversion -Wconversion
-    -Wint-in-bool-context
-    -Wmissing-declarations
+    -Wconversion -Wint-in-bool-context
+    -Wmissing-declarations -Wmissing-field-initializers
     -Werror
 )
 

src/dbc.cpp

@@ -27,6 +27,7 @@ const auto whiteSpace = "\\s";
 
 enum VALToken { Identifier = 0, CANId, SignalName, Value, Description };
 
+struct VALObject;
 struct VALObject {
 	uint32_t can_id;
 	std::string signal_name;

src/message.cpp

@@ -57,9 +57,9 @@ Message::ParseSignalsStatus Message::parseSignals(const std::vector<uint8_t>& da
 				const int negative = (v & (1ull << (signal.size - 1))) != 0;
 				int64_t nativeInt;
 				if (negative)
-					nativeInt = v | ~((1ull << signal.size) - 1); // invert all bits above signal.size
+					nativeInt = static_cast<int64_t>(v | ~((1ull << signal.size) - 1)); // invert all bits above signal.size
 				else
-					nativeInt = v & ((1ull << signal.size) - 1); // masking
+					nativeInt = static_cast<int64_t>(v & ((1ull << signal.size) - 1)); // masking
 				values.push_back(static_cast<double>(nativeInt) * signal.factor + signal.offset);
 				break;
 			}