shiboken: Fix crash when smartptr template class cannot be found

shiboken currently crashes when naively trying to use std::shared_ptr
since it does not see the template due to system directories being
excluded from clang parsing. Add an error message and bail out.

Task-number: PYSIDE-454
Change-Id: I6627e968061f8f704a90f898879f3861308e1705
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

1 files changed, 12 insertions, 0 deletions

diff --git a/sources/shiboken2/ApiExtractor/messages.cpp b/sources/shiboken2/ApiExtractor/messages.cpp
index 5b3a57fcc..b571c08b9 100644
--- a/sources/shiboken2/ApiExtractor/messages.cpp
+++ b/sources/shiboken2/ApiExtractor/messages.cpp
@@ -328,6 +328,18 @@ QString msgConversionTypesDiffer(const QString &varType, const QString &conversi
     return result;
 }
 
+QString msgCannotFindSmartPointer(const QString &instantiationType,
+                                  const AbstractMetaClassList &pointers)
+{
+    QString result;
+    QTextStream str(&result);
+    str << "Unable to find smart pointer type for " << instantiationType << " (known types:";
+    for (auto t : pointers)
+        str << ' ' << t->fullName();
+    str << ").";
+    return result;
+}
+
 // main.cpp
 
 QString msgLeftOverArguments(const QMap<QString, QString> &remainingArgs)