Improve for-in and for-of support

Create a Block scope per iteration as defined in the ES spec. So
closures created inside the loop will remember the iteration variable
at that loop iteration.

Add support for destructuring of the left hand side expression or
declaration.

Change-Id: Id06ef94e2a4b93646827da4f6ce922eb436e5a31
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/qml/compiler/qv4compilerscanfunctions.cpp b/src/qml/compiler/qv4compilerscanfunctions.cpp
index eadbc3ae17..ccf7e49e25 100644
--- a/src/qml/compiler/qv4compilerscanfunctions.cpp
+++ b/src/qml/compiler/qv4compilerscanfunctions.cpp
@@ -342,6 +342,8 @@ bool ScanFunctions::visit(LocalForStatement *ast) {
 }
 
 bool ScanFunctions::visit(ForEachStatement *ast) {
+    enterEnvironment(ast, ContextType::Block);
+    _context->name = QLatin1String("Foreach");
     Node::accept(ast->lhs, this);
     Node::accept(ast->expression, this);
 
@@ -351,6 +353,11 @@ bool ScanFunctions::visit(ForEachStatement *ast) {
     return false;
 }
 
+void ScanFunctions::endVisit(ForEachStatement *)
+{
+    leaveEnvironment();
+}
+
 bool ScanFunctions::visit(ThisExpression *)
 {
     _context->usesThis = true;