+struct Diagnostic
+{
+ enum Severity
+ {
+ INFO,
+ WARN,
+ ERR
+ };
+
+ Severity severity;
+ int source;
+ unsigned line;
+ int provoking_source;
+ unsigned provoking_line;
+ std::string message;
+
+ Diagnostic(): severity(INFO), source(-2), line(0) { }
+};
+