The Annoyance Filter.pdf - Fourmilab

§169 ANNOYANCE-FILTER MAIL FOLDER 141
169. When we detect an error within the message, it’s reported to standard error if we’re in verbose
mode and appended to the parserDiagnostics for inclusion in the transcript if the “p” annotation
is selected. This method is public so higher-level parsing routines can use it to append their own
diagnostics. Since in many cases we compose the diagnostic in an ostringstream, we overload a
variant which accepts one directly as an argument.
〈 Class implementations 11 〉 +≡
void mailFolder ::reportParserDiagnostic(const string s)
{
if (verbose ) {
if ((lastFromLine ≠ fromLine ) ∨ (lastMessageID ≠ messageID )) {
cerr ≪ fromLine ≪ endl ;
if (messageID ≠ "") {
cerr ≪ "Message−ID:␣" ≪ messageID ≪ ":" ≪ endl ;
}
lastFromLine = fromLine ;
lastMessageID = messageID ;
}
cerr ≪ "␣␣␣␣" ≪ s ≪ endl ;
}
if (Annotate (’p’) ∨ Annotate (’d’)) {
parserDiagnostics .push (s);
}
}
void mailFolder ::reportParserDiagnostic(const ostringstream &os )
{
reportParserDiagnostic(os .str ( ));
}