Introduce Q_PROPERTY attribute REQUIRED

This is meant to correspond to required properties in QML.

Change-Id: I2645981e13f7423bc86b48370c165b3cfe2aaa62
Task-number: QTBUG-81561
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

3 files changed, 7 insertions, 0 deletions

diff --git a/src/tools/moc/generator.cpp b/src/tools/moc/generator.cpp
index 034e846918..8d4fb2efc6 100644
--- a/src/tools/moc/generator.cpp
+++ b/src/tools/moc/generator.cpp
@@ -864,6 +864,8 @@ void Generator::generateProperties()
             flags |= Constant;
         if (p.final)
             flags |= Final;
+        if (p.required)
+            flags |= Required;
 
         fprintf(out, "    %4d, ", stridx(p.name));
         generateTypeInfo(p.type);
diff --git a/src/tools/moc/moc.cpp b/src/tools/moc/moc.cpp
index d7a1af0a18..b562416c31 100644
--- a/src/tools/moc/moc.cpp
+++ b/src/tools/moc/moc.cpp
@@ -1238,6 +1238,9 @@ void Moc::createPropertyDef(PropertyDef &propDef)
         } else if(l[0] == 'F' && l == "FINAL") {
             propDef.final = true;
             continue;
+        } else if (l[0] == 'R' && l == "REQUIRED") {
+            propDef.required = true;
+            continue;
         }
 
         QByteArray v, v2;
@@ -1960,6 +1963,7 @@ QJsonObject PropertyDef::toJson() const
 
     prop[QLatin1String("constant")] = constant;
     prop[QLatin1String("final")] = final;
+    prop[QLatin1String("required")] = required;
 
     if (revision > 0)
         prop[QLatin1String("revision")] = revision;
diff --git a/src/tools/moc/moc.h b/src/tools/moc/moc.h
index 5d1ae0ad6d..04814b85a1 100644
--- a/src/tools/moc/moc.h
+++ b/src/tools/moc/moc.h
@@ -137,6 +137,7 @@ struct PropertyDef
     int revision = 0;
     bool constant = false;
     bool final = false;
+    bool required = false;
 
     QJsonObject toJson() const;
 };