qdoc: properly implement \typealias command

\typealias was already a command recognized by QDoc, but it was simply
treated as a synonym for \typedef and was not documented. Implement
proper support for the command:

 - Add [alias] designation both in type summary and details.
 - Auto-generate information about the aliased type, including a link
   if aliasing a public, documented type.
 - Auto-convert aliases documented with \typedef to type aliases.
 - Add basic support for aliases also to DocBook and WebXML generators.
 - Document \typealias.

Fixes: QTBUG-82712
Change-Id: Iafa8c7def0a7488d7521fbc2862290a9bb3167ff
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/qdoc/generatedoutput/testdata/testcpp/testcpp.cpp b/tests/auto/qdoc/generatedoutput/testdata/testcpp/testcpp.cpp
index 31b910fae..e43ecf0b7 100644
--- a/tests/auto/qdoc/generatedoutput/testdata/testcpp/testcpp.cpp
+++ b/tests/auto/qdoc/generatedoutput/testdata/testcpp/testcpp.cpp
@@ -155,6 +155,11 @@ void Test::virtualFun()
 }
 
 /*!
+    \typedef Test::SomeType
+    \brief A typedef.
+*/
+
+/*!
     \reimp
 */
 void TestDerived::virtualFun()
@@ -173,6 +178,16 @@ void TestDerived::virtualFun()
 */
 
 /*!
+    \typealias TestDerived::DerivedType
+    An aliased typedef.
+*/
+
+/*!
+    \typedef TestDerived::NotTypedef
+    I'm an alias, not a typedef.
+*/
+
+/*!
 \if defined(test_template)
     \fn template <typename T1, typename T2> void TestQDoc::Test::funcTemplate(T1 a, T2 b)
     \brief Function template with two parameters, \a a and \a b.