Add (and ignore for now) type assertions to QML

You can write "(something as Foo)" to give hints to any tools that you
expect something to be a Foo at this place. This is not a conversion and
ignored at runtime for now. Eventually the compiler will verify that the
type assertions are plausible and error out if they aren't.

Change-Id: I21c8705bb387f7ab2cbc153293dbf477663afe87
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/qml/compiler/qv4codegen.cpp b/src/qml/compiler/qv4codegen.cpp
index c43ea64e2e..fff6a2fe4c 100644
--- a/src/qml/compiler/qv4codegen.cpp
+++ b/src/qml/compiler/qv4codegen.cpp
@@ -1497,7 +1497,9 @@ bool Codegen::visit(BinaryExpression *ast)
 
         break;
     }
-
+    case QSOperator::As:
+        setExprResult(left);
+        break;
     } // switch
 
     return false;