moc: Add an error overload taking a Symbol and a message

This allows deferring warnigs about a certain error until later, by
storing the symbol (while still allowing to print a custom message).

Change-Id: Id434eec9b344b1f8b18c504dfda8fed90167cf12
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

Author: Inkane

src/tools/moc/parser.cpp

@@ -69,6 +69,12 @@ void Parser::error(const char *msg)
     exit(EXIT_FAILURE);
 }
 
+void Parser::error(const Symbol& symbol, const char *msg)
+{
+    printMsg("error: %s\n", msg, symbol);
+    exit(EXIT_FAILURE);
+}
+
 void Parser::warning(const Symbol &sym, QByteArrayView msg)
 {
     if (displayWarnings)

src/tools/moc/parser.h

@@ -48,6 +48,7 @@ class Parser
 
     Q_NORETURN void error(const Symbol &symbol);
     Q_NORETURN void error(const char *msg = nullptr);
+    Q_NORETURN void error(const Symbol &symbol, const char *msg);
     void warning(const char * = nullptr);
     void warning(const Symbol &sym, QByteArrayView msg);
     void note(const char * = nullptr);