shiboken: Improve error messages about rejected enums

Use different messages for type entry not found and conflicting types.

Spell out values of anonymous enums and indicate scoped enums
and associated classes.

Change-Id: Id60eb70c28790019b29ebae174369e6963909587
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
Reviewed-by: Christian Tismer <tismer@stackless.com>

3 files changed, 77 insertions, 9 deletions

diff --git a/sources/pyside2/PySide2/QtCore/typesystem_core_common.xml b/sources/pyside2/PySide2/QtCore/typesystem_core_common.xml
index 1744a5927..ba141a177 100644
--- a/sources/pyside2/PySide2/QtCore/typesystem_core_common.xml
+++ b/sources/pyside2/PySide2/QtCore/typesystem_core_common.xml
@@ -4410,7 +4410,7 @@ s1.addTransition(button.clicked, s1h)</code>
   <suppress-warning text="enum 'Role' does not have a type entry or is not an enum" />
 
   <!-- Anonymous enum in qtbase/src/corelib/global/qtypeinfo.h -->
-  <suppress-warning text="enum 'Q_RELOCATABLE_TYPE' does not have a type entry or is not an enum" />
+  <suppress-warning text="Anonymous enum (Q_COMPLEX_TYPE, ... , Q_RELOCATABLE_TYPE) does not have a type entry"/>
 
   <!-- Another anonymous enum / value pair in in qtbase/src/corelib/kernel/qcoreapplication.h -->
   <suppress-warning text="no matching enum 'QT_VERSION'" />
diff --git a/sources/pyside2/PySide2/QtQml/typesystem_qml.xml b/sources/pyside2/PySide2/QtQml/typesystem_qml.xml
index 5103b9218..4a346f232 100644
--- a/sources/pyside2/PySide2/QtQml/typesystem_qml.xml
+++ b/sources/pyside2/PySide2/QtQml/typesystem_qml.xml
@@ -217,5 +217,5 @@
       </modify-function>
     </object-type>
     <!-- Suppress anonymous enum warning -->
-    <suppress-warning text="enum 'QmlCurrentSingletonTypeRegistrationVersion' does not have a type entry or is not an enum" />
+    <suppress-warning text="Anonymous enum (QmlCurrentSingletonTypeRegistrationVersion) does not have a type entry"/>
 </typesystem>
diff --git a/sources/shiboken2/ApiExtractor/abstractmetabuilder.cpp b/sources/shiboken2/ApiExtractor/abstractmetabuilder.cpp
index a200a87d1..85bb1b789 100644
--- a/sources/shiboken2/ApiExtractor/abstractmetabuilder.cpp
+++ b/sources/shiboken2/ApiExtractor/abstractmetabuilder.cpp
@@ -863,6 +863,66 @@ AbstractMetaClass *AbstractMetaBuilderPrivate::traverseNamespace(const FileModel
     return metaClass;
 }
 
+template <class Stream>
+static void msgFormatEnumType(Stream &str,
+                              const EnumModelItem &enumItem,
+                              const QString &className)
+{
+    switch (enumItem->enumKind()) {
+    case CEnum:
+        str << "Enum '" << enumItem->qualifiedName().join(colonColon()) << '\'';
+        break;
+    case AnonymousEnum: {
+        const EnumeratorList &values = enumItem->enumerators();
+        str << "Anonymous enum (";
+        switch (values.size()) {
+        case 0:
+            break;
+        case 1:
+            str << values.constFirst()->name();
+            break;
+        case 2:
+            str << values.at(0)->name() << ", " << values.at(1)->name();
+            break;
+        default:
+            str << values.at(0)->name() << ", ... , "
+                << values.at(values.size() - 1)->name();
+            break;
+        }
+        str << ')';
+    }
+        break;
+    case EnumClass:
+        str << "Scoped enum '" << enumItem->qualifiedName().join(colonColon()) << '\'';
+        break;
+    }
+    if (!className.isEmpty())
+        str << " (class: " << className << ')';
+}
+
+static inline QString msgNoEnumTypeEntry(const EnumModelItem &enumItem,
+                                         const QString &className)
+{
+    QString result;
+    QTextStream str(&result);
+    msgFormatEnumType(str, enumItem, className);
+    str << " does not have a type entry";
+    return result;
+}
+
+static QString msgNoEnumTypeConflict(const EnumModelItem &enumItem,
+                                     const QString &className,
+                                     const TypeEntry *t)
+{
+    QString result;
+    QDebug debug(&result); // Use the debug operator for TypeEntry::Type
+    debug.noquote();
+    debug.nospace();
+    msgFormatEnumType(debug, enumItem, className);
+    debug << " is not an enum (type: " << t->type() << ')';
+    return result;
+}
+
 AbstractMetaEnum *AbstractMetaBuilderPrivate::traverseEnum(const EnumModelItem &enumItem,
                                                            AbstractMetaClass *enclosing,
                                                            const QSet<QString> &enumsDeclarations)
@@ -907,15 +967,23 @@ AbstractMetaEnum *AbstractMetaBuilderPrivate::traverseEnum(const EnumModelItem &
         return 0;
     }
 
-    if ((!typeEntry || !typeEntry->isEnum())) {
-        if (!m_currentClass ||
-                (m_currentClass->typeEntry()->codeGeneration() & TypeEntry::GenerateTargetLang)) {
-            qCWarning(lcShiboken).noquote().nospace()
-                << QStringLiteral("enum '%1' does not have a type entry or is not an enum")
-                              .arg(qualifiedName);
+    const bool rejectionWarning = !m_currentClass
+        || (m_currentClass->typeEntry()->codeGeneration() & TypeEntry::GenerateTargetLang);
+
+    if (!typeEntry) {
+        if (rejectionWarning)
+            qCWarning(lcShiboken, "%s", qPrintable(msgNoEnumTypeEntry(enumItem, className)));
+        m_rejectedEnums.insert(qualifiedName, AbstractMetaBuilder::NotInTypeSystem);
+        return nullptr;
+    }
+
+    if (!typeEntry->isEnum()) {
+        if (rejectionWarning) {
+            qCWarning(lcShiboken, "%s",
+                      qPrintable(msgNoEnumTypeConflict(enumItem, className, typeEntry)));
         }
         m_rejectedEnums.insert(qualifiedName, AbstractMetaBuilder::NotInTypeSystem);
-        return 0;
+        return nullptr;
     }
 
     AbstractMetaEnum *metaEnum = new AbstractMetaEnum;