Add a Pragma for list assign behavior

[ChangeLog][QtQml] You can now specify the list property assignment
behavior in QML using the "ListPropertyAssignBehavior" pragma. This is
analogous to the macros you can use in C++.

Fixes: QTBUG-93642
Change-Id: I9bdcf198031f1e24891f947b0990a3253d29a998
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

2 files changed, 13 insertions, 2 deletions

diff --git a/src/qml/parser/qqmljs.g b/src/qml/parser/qqmljs.g
index a78dd383f3..7fd2db03a5 100644
--- a/src/qml/parser/qqmljs.g
+++ b/src/qml/parser/qqmljs.g
@@ -824,6 +824,16 @@ UiPragma: T_PRAGMA PragmaId Semicolon;
     } break;
 ./
 
+UiPragma: T_PRAGMA PragmaId T_COLON JsIdentifier Semicolon;
+/.
+    case $rule_number: {
+        AST::UiPragma *pragma = new (pool) AST::UiPragma(stringRef(2), stringRef(4));
+        pragma->pragmaToken = loc(1);
+        pragma->semicolonToken = loc(5);
+        sym(1).Node = pragma;
+    } break;
+./
+
 ImportId: MemberExpression;
 
 UiImport: UiImportHead Semicolon;
diff --git a/src/qml/parser/qqmljsast_p.h b/src/qml/parser/qqmljsast_p.h
index bd4e225412..ba646919dc 100644
--- a/src/qml/parser/qqmljsast_p.h
+++ b/src/qml/parser/qqmljsast_p.h
@@ -3135,8 +3135,8 @@ class QML_PARSER_EXPORT UiPragma: public Node
 public:
     QQMLJS_DECLARE_AST_NODE(UiPragma)
 
-    UiPragma(QStringView name)
-        : name(name)
+    UiPragma(QStringView name, QStringView value = {})
+        : name(name), value(value)
     { kind = K; }
 
     void accept0(BaseVisitor *visitor) override;
@@ -3149,6 +3149,7 @@ public:
 
 // attributes
     QStringView name;
+    QStringView value;
     SourceLocation pragmaToken;
     SourceLocation semicolonToken;
 };