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-rw-r--r--js/src/frontend/ParseNode.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/js/src/frontend/ParseNode.h b/js/src/frontend/ParseNode.h
index c3523afe4..c0669d85e 100644
--- a/js/src/frontend/ParseNode.h
+++ b/js/src/frontend/ParseNode.h
@@ -54,6 +54,7 @@ class ObjectBox;
F(TRUE) \
F(FALSE) \
F(NULL) \
+ F(RAW_UNDEFINED) \
F(THIS) \
F(FUNCTION) \
F(MODULE) \
@@ -406,7 +407,8 @@ IsTypeofKind(ParseNodeKind kind)
* PNK_NUMBER dval pn_dval: double value of numeric literal
* PNK_TRUE, nullary pn_op: JSOp bytecode
* PNK_FALSE,
- * PNK_NULL
+ * PNK_NULL,
+ * PNK_RAW_UNDEFINED
*
* PNK_THIS, unary pn_kid: '.this' Name if function `this`, else nullptr
* PNK_SUPERBASE unary pn_kid: '.this' Name
@@ -686,7 +688,8 @@ class ParseNode
isKind(PNK_STRING) ||
isKind(PNK_TRUE) ||
isKind(PNK_FALSE) ||
- isKind(PNK_NULL);
+ isKind(PNK_NULL) ||
+ isKind(PNK_RAW_UNDEFINED);
}
/* Return true if this node appears in a Directive Prologue. */
@@ -1141,6 +1144,16 @@ class NullLiteral : public ParseNode
explicit NullLiteral(const TokenPos& pos) : ParseNode(PNK_NULL, JSOP_NULL, PN_NULLARY, pos) { }
};
+// This is only used internally, currently just for tagged templates.
+// It represents the value 'undefined' (aka `void 0`), like NullLiteral
+// represents the value 'null'.
+class RawUndefinedLiteral : public ParseNode
+{
+ public:
+ explicit RawUndefinedLiteral(const TokenPos& pos)
+ : ParseNode(PNK_RAW_UNDEFINED, JSOP_UNDEFINED, PN_NULLARY, pos) { }
+};
+
class BooleanLiteral : public ParseNode
{
public:
@@ -1361,6 +1374,7 @@ ParseNode::isConstant()
case PNK_STRING:
case PNK_TEMPLATE_STRING:
case PNK_NULL:
+ case PNK_RAW_UNDEFINED:
case PNK_FALSE:
case PNK_TRUE:
return true;