Don't rewrite the body of function expressions

That is, don't look inside function expressions when rewriting
bindings as closures.

Task-number: QTBUG-25901
Change-Id: Ia4b99d3c58c4482e9505cf2461bd14942a9a00ca
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>

src/qml/qml/qqmlrewrite.cpp

@@ -313,6 +313,16 @@ void RewriteBinding::endVisit(AST::LocalForEachStatement *)
     --_inLoop;
 }
 
+bool RewriteBinding::visit(AST::FunctionExpression *)
+{
+    return false;
+}
+
+bool RewriteBinding::visit(AST::FunctionDeclaration *)
+{
+    return false;
+}
+
 bool RewriteBinding::visit(AST::CaseBlock *ast)
 {
     // Process the initial sequence of the case clauses.

src/qml/qml/qqmlrewrite_p.h

@@ -120,6 +120,9 @@ protected:
 
     virtual bool visit(AST::CaseBlock *ast);
 
+    virtual bool visit(AST::FunctionExpression *ast);
+    virtual bool visit(AST::FunctionDeclaration *ast);
+
 private:
     int _inLoop;
 };

tests/auto/qml/qqmlecmascript/data/propertyQJSValue.16.qml

@@ -0,0 +1,22 @@
+import QtQuick 2.0
+import Qt.test 1.0
+
+MyQmlObject {
+    property bool test: false
+    property string string1
+
+    qjsvalue: function () {
+        string1 = "Test case 1"
+        return 100;
+    }
+
+    Component.onCompleted: {
+        if (qjsvalue() != 100)
+            return
+
+        if (string1 != "Test case 1")
+            return;
+
+        test = true;
+    }
+}

tests/auto/qml/qqmlecmascript/data/propertyVar.16.qml

@@ -0,0 +1,36 @@
+import QtQuick 2.0
+
+Item {
+    property bool test: false
+    property string string1
+    property string string2
+
+    property var f1 : function () {
+        string1 = "Test case 1"
+        return 100;
+    }
+
+    property var f2;
+    function testcase2() {
+        string2 = "Test case 2"
+        return 100;
+    }
+
+    f2: testcase2
+
+    Component.onCompleted: {
+        if (f1() != 100)
+            return
+
+        if (f2() != 100)
+            return;
+
+        if (string1 != "Test case 1")
+            return;
+
+        if (string2 != "Test case 2")
+            return;
+
+        test = true;
+    }
+}

tests/auto/qml/qqmlecmascript/tst_qqmlecmascript.cpp

@@ -4228,6 +4228,7 @@ void tst_qqmlecmascript::propertyVar_data()
     QTest::newRow("declarative binding assignment") << testFileUrl("propertyVar.13.qml");
     QTest::newRow("imperative binding assignment") << testFileUrl("propertyVar.14.qml");
     QTest::newRow("stored binding assignment") << testFileUrl("propertyVar.15.qml");
+    QTest::newRow("function expression binding assignment") << testFileUrl("propertyVar.16.qml");
 }
 
 void tst_qqmlecmascript::propertyVar()
@@ -4263,6 +4264,7 @@ void tst_qqmlecmascript::propertyQJSValue_data()
     QTest::newRow("declarative binding assignment") << testFileUrl("propertyQJSValue.13.qml");
     QTest::newRow("imperative binding assignment") << testFileUrl("propertyQJSValue.14.qml");
     QTest::newRow("stored binding assignment") << testFileUrl("propertyQJSValue.15.qml");
+    QTest::newRow("javascript function binding") << testFileUrl("propertyQJSValue.16.qml");
 
     QTest::newRow("reset property") << testFileUrl("propertyQJSValue.reset.qml");
     QTest::newRow("reset property in binding") << testFileUrl("propertyQJSValue.bindingreset.qml");