shiboken: Store null enum values

If an enum has a null value, store that on the EnumTypeEntry for
use in Generator::minimalConstructor() as a default value.
Fully qualify scoped enum value type entries for this purpose.

The value can then be used for default values instead of an ugly
static_cast<EnumType>(0).

Task-number: PYSIDE-62
Change-Id: I42cb2ca63fb1da6c795df630ab30bded66aac901
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/sources/shiboken2/ApiExtractor/typesystem.h b/sources/shiboken2/ApiExtractor/typesystem.h
index 26f94e3ee..d892cb3a5 100644
--- a/sources/shiboken2/ApiExtractor/typesystem.h
+++ b/sources/shiboken2/ApiExtractor/typesystem.h
@@ -1067,6 +1067,8 @@ private:
     PrimitiveTypeEntry* m_referencedTypeEntry = nullptr;
 };
 
+class EnumValueTypeEntry;
+
 class EnumTypeEntry : public TypeEntry
 {
 public:
@@ -1088,6 +1090,9 @@ public:
         m_qualifier = q;
     }
 
+    const EnumValueTypeEntry *nullValue() const { return m_nullValue; }
+    void setNullValue(const EnumValueTypeEntry *n) { m_nullValue = n; }
+
     void setFlags(FlagsTypeEntry *flags)
     {
         m_flags = flags;
@@ -1121,6 +1126,7 @@ private:
     QString m_packageName;
     QString m_qualifier;
     QString m_targetLangName;
+    const EnumValueTypeEntry *m_nullValue = nullptr;
 
     QStringList m_rejectedEnums;