Extend linter to check for unqualified ids

The linter has gained a new option (-U/--check-unqualified).
If run with this option, it warns about occurrences of unqualified identifiers.
Furthermore, it attempts to detect the reason for why the identifier can be
used unqalified:

- If the id originates from the root element, it suggests to qualify the
  access either with the root element's id, or with "parent" if applicable.

- If the id is the parameter of a signal, it suggests to use functions in the
  handler, instead of relying on the signal parameters to be "magically"
  injected into scope.

The linter does not attempt to handle with statements, but warns the
user instead that they are a bad idea.

Change-Id: I9aaf28c37595d84886a1071d49b86799b222a617
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/qml/qmllint/data/WithStatement.qml b/tests/auto/qml/qmllint/data/WithStatement.qml
new file mode 100644
index 0000000000..5641f21eeb
--- /dev/null
+++ b/tests/auto/qml/qmllint/data/WithStatement.qml
@@ -0,0 +1,13 @@
+import QtQuick 2.0
+
+Item {
+    Item {
+        id: target
+        property int test: 42
+    }
+    Component.onCompleted: {
+        with(target) {
+            console.log(test);
+        }
+    }
+}