Each statement class in separate file

src/Parser/Statement/StatementInvalid.cpp

@@ -0,0 +1,12 @@
+#include "Parser/Statement/StatementInvalid.h"
+
+StatementInvalid::StatementInvalid(shared_ptr<Token> token, string message):
+Statement(StatementKind::INVALID), token(token), message(message) { }
+
+string StatementInvalid::toString(int indent) {
+    return "Error for token " + token->toString() + " at " + to_string(token->getLine()) + ":" + to_string(token->getColumn()) + ": " + message + "\n";
+}
+
+string StatementInvalid::getMessage() {
+    return message;
+}