shiboken: Check whether enum should be converted to int for the protected hack

Find the AbstractMetaEnum belonging to the type entry and perform some
checks. Generally do not use int for public enums. Warn when a
protected scoped enum is encountered as this cannot be converted.

Task-number: PYSIDE-817
Change-Id: I02b566093b331ea2ea627bf72964aad0a1a51c83
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Christian Tismer <tismer@stackless.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/sources/shiboken2/ApiExtractor/messages.cpp b/sources/shiboken2/ApiExtractor/messages.cpp
index b81585933..fa4c75743 100644
--- a/sources/shiboken2/ApiExtractor/messages.cpp
+++ b/sources/shiboken2/ApiExtractor/messages.cpp
@@ -291,6 +291,15 @@ QString msgCannotOpenForWriting(const QFile &f)
            .arg(QDir::toNativeSeparators(f.fileName()), f.errorString());
 }
 
+// generator.cpp
+
+QString msgCannotUseEnumAsInt(const QString &name)
+{
+    return QLatin1String("Cannot convert the protected scoped enum \"") + name
+        + QLatin1String("\" to type int when generating wrappers for the protected hack. "
+                        "Compilation errors may occur when used as a function argument.");
+}
+
 // main.cpp
 
 QString msgLeftOverArguments(const QMap<QString, QString> &remainingArgs)
diff --git a/sources/shiboken2/ApiExtractor/messages.h b/sources/shiboken2/ApiExtractor/messages.h
index cf6800b5d..539332aef 100644
--- a/sources/shiboken2/ApiExtractor/messages.h
+++ b/sources/shiboken2/ApiExtractor/messages.h
@@ -109,6 +109,8 @@ QString msgCannotOpenForReading(const QFile &f);
 
 QString msgCannotOpenForWriting(const QFile &f);
 
+QString msgCannotUseEnumAsInt(const QString &name);
+
 QString msgLeftOverArguments(const QMap<QString, QString> &remainingArgs);
 
 QString msgInvalidVersion(const QString &package, const QString &version);