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, 13 insertions, 0 deletions

diff --git a/tests/auto/qdoc/generatedoutput/expected_output/docbook/testqdoc-test.xml b/tests/auto/qdoc/generatedoutput/expected_output/docbook/testqdoc-test.xml
index 76025b06e..768e4d8f1 100644
--- a/tests/auto/qdoc/generatedoutput/expected_output/docbook/testqdoc-test.xml
+++ b/tests/auto/qdoc/generatedoutput/expected_output/docbook/testqdoc-test.xml
@@ -32,6 +32,19 @@
 <db:section xml:id="details">
 <db:title>Detailed Description</db:title>
 </db:section>
+<db:section xml:id="member-type-documentation">
+<db:title>Member Type Documentation</db:title>
+<db:section xml:id="SomeType-typedef">
+<db:title>Test::typedef SomeType</db:title>
+<db:typedefsynopsis>
+<db:type>SomeType</db:type><db:synopsisinfo db:role="access">public</db:synopsisinfo>
+<db:synopsisinfo db:role="status">active</db:synopsisinfo>
+<db:synopsisinfo db:role="threadsafeness">unspecified</db:synopsisinfo>
+<db:synopsisinfo db:role="module">TestCPP</db:synopsisinfo>
+</db:typedefsynopsis>
+<db:para>A typedef.</db:para>
+</db:section>
+</db:section>
 <db:section xml:id="member-function-documentation">
 <db:title>Member Function Documentation</db:title>
 <db:section xml:id="overload">