From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Tue, 25 Apr 2023 08:00:39 +0000 (+0200)
Subject: shiboken2/clang: Fix and simplify resolveType() helper
X-Git-Tag: archive/raspbian/5.15.16-3.1+rpi1^2~9
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7c40b177283c3a7b19d56bb62a58df09f35d1995;p=pyside2.git

shiboken2/clang: Fix and simplify resolveType() helper

The function had a bug which only manifested with clang 16:
"type" should have been assigned the type of the cursor
obtained from clang_getTypeDeclaration(). With this, the complicated
lookup code in getBaseClass() can be removed.

Task-number: PYSIDE-2288
Pick-to: 6.5
Change-Id: I861e30451b3f4af2ec0c2e4ffa4179a429854533
Reviewed-by: Christian Tismer <tismer@stackless.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

Gbp-Pq: Name shiboken2-clang-Fix-and-simplify-resolveType-helper.patch
---

diff --git a/sources/shiboken2/ApiExtractor/clangparser/clangbuilder.cpp b/sources/shiboken2/ApiExtractor/clangparser/clangbuilder.cpp
index e8e5bcf..1b4c81c 100644
--- a/sources/shiboken2/ApiExtractor/clangparser/clangbuilder.cpp
+++ b/sources/shiboken2/ApiExtractor/clangparser/clangbuilder.cpp
@@ -627,6 +627,9 @@ long clang_EnumDecl_isScoped4(BaseVisitor *bv, const CXCursor &cursor)
 #endif // CLANG_NO_ENUMDECL_ISSCOPED
 
 // Resolve declaration and type of a base class
+// Note: TypeAliasTemplateDecl ("using QVector<T>=QList<T>") is automatically
+// resolved by clang_getTypeDeclaration(), but it stops at
+// TypeAliasDecl / TypedefDecl.
 
 struct TypeDeclaration
 {
@@ -634,19 +637,23 @@ struct TypeDeclaration
     CXCursor declaration;
 };
 
+static inline bool isTypeAliasDecl(const CXCursor &cursor)
+{
+    const auto kind = clang_getCursorKind(cursor);
+    return kind == CXCursor_TypeAliasDecl || kind == CXCursor_TypedefDecl;
+}
+
 static TypeDeclaration resolveBaseSpecifier(const CXCursor &cursor)
 {
     Q_ASSERT(clang_getCursorKind(cursor) == CXCursor_CXXBaseSpecifier);
     CXType inheritedType = clang_getCursorType(cursor);
     CXCursor decl = clang_getTypeDeclaration(inheritedType);
-    if (inheritedType.kind != CXType_Unexposed) {
-        while (true) {
-            auto kind = clang_getCursorKind(decl);
-            if (kind != CXCursor_TypeAliasDecl && kind != CXCursor_TypedefDecl)
-                break;
-            inheritedType = clang_getTypedefDeclUnderlyingType(decl);
-            decl = clang_getTypeDeclaration(inheritedType);
-        }
+    auto resolvedType = clang_getCursorType(decl);
+    if (resolvedType.kind != CXType_Invalid && resolvedType.kind != inheritedType.kind)
+        inheritedType = resolvedType;
+    while (isTypeAliasDecl(decl)) {
+        inheritedType = clang_getTypedefDeclUnderlyingType(decl);
+        decl = clang_getTypeDeclaration(inheritedType);
     }
     return {inheritedType, decl};
 }
@@ -656,20 +663,10 @@ void BuilderPrivate::addBaseClass(const CXCursor &cursor)
 {
     Q_ASSERT(clang_getCursorKind(cursor) == CXCursor_CXXBaseSpecifier);
     // Note: spelling has "struct baseClass", use type
-    QString baseClassName;
     const auto decl = resolveBaseSpecifier(cursor);
-    if (decl.type.kind == CXType_Unexposed) {
-        // The type is unexposed when the base class is a template type alias:
-        // "class QItemSelection : public QList<X>" where QList is aliased to QVector.
-        // Try to resolve via code model.
-        TypeInfo info = createTypeInfo(decl.type);
-        auto parentScope = m_scopeStack.at(m_scopeStack.size() - 2); // Current is class.
-        auto resolved = TypeInfo::resolveType(info, parentScope);
-        if (resolved != info)
-            baseClassName = resolved.toString();
-    }
-    if (baseClassName.isEmpty())
-        baseClassName = getTypeName(decl.type);
+    QString baseClassName = getTypeName(decl.type);
+    if (baseClassName.startsWith(u"std::")) // Simplify "std::" types
+        baseClassName = createTypeInfo(decl.type).toString();
 
     auto it = m_cursorClassHash.constFind(decl.declaration);
     const CodeModel::AccessPolicy access = accessPolicy(clang_getCXXAccessSpecifier(cursor));