Added support for generator functions and yield expressions to the AST

Some smaller changes to the codegen are included as well to ensure
that we catch all uses of generators and properly throw an unimplemented
error on them for now.

Change-Id: Ib915a0e862e128644ff00dfe989507783c912c66
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/qml/parser/qqmljsast_p.h b/src/qml/parser/qqmljsast_p.h
index 21e27de5ac..e88eee4a37 100644
--- a/src/qml/parser/qqmljsast_p.h
+++ b/src/qml/parser/qqmljsast_p.h
@@ -170,6 +170,7 @@ public:
         Kind_NewMemberExpression,
         Kind_NotExpression,
         Kind_NullExpression,
+        Kind_YieldExpression,
         Kind_NumericLiteral,
         Kind_NumericLiteralPropertyName,
         Kind_ObjectLiteral,
@@ -1801,6 +1802,28 @@ public:
     SourceLocation semicolonToken;
 };
 
+class QML_PARSER_EXPORT YieldExpression: public ExpressionNode
+{
+public:
+    QQMLJS_DECLARE_AST_NODE(YieldExpression)
+
+    YieldExpression(ExpressionNode *e = nullptr):
+        expression (e) { kind = K; }
+
+    void accept0(Visitor *visitor) override;
+
+    SourceLocation firstSourceLocation() const override
+    { return yieldToken; }
+
+    SourceLocation lastSourceLocation() const override
+    { return expression ? expression->lastSourceLocation() : yieldToken; }
+
+// attributes
+    ExpressionNode *expression;
+    bool isYieldStar = false;
+    SourceLocation yieldToken;
+};
+
 class QML_PARSER_EXPORT WithStatement: public Statement
 {
 public:
@@ -2113,6 +2136,7 @@ public:
 // attributes
     QStringRef name;
     bool isArrowFunction = false;
+    bool isGenerator = false;
     FormalParameterList *formals;
     StatementList *body;
     SourceLocation functionToken;