1 files changed, 71 insertions, 0 deletions
diff --git a/js/src/builtin/Symbol.h b/js/src/builtin/Symbol.h
new file mode 100644
index 0000000000..7da3a561b0
--- /dev/null
+++ b/js/src/builtin/Symbol.h
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef builtin_Symbol_h
+#define builtin_Symbol_h
+
+#include "vm/NativeObject.h"
+
+namespace JS {
+class Symbol;
+}
+
+namespace js {
+
+class SymbolObject : public NativeObject {
+  /* Stores this Symbol object's [[PrimitiveValue]]. */
+  static const unsigned PRIMITIVE_VALUE_SLOT = 0;
+
+ public:
+  static const unsigned RESERVED_SLOTS = 1;
+
+  static const JSClass class_;
+  static const JSClass& protoClass_;
+
+  /*
+   * Creates a new Symbol object boxing the given primitive Symbol.  The
+   * object's [[Prototype]] is determined from context.
+   */
+  static SymbolObject* create(JSContext* cx, JS::HandleSymbol symbol);
+
+  JS::Symbol* unbox() const {
+    return getFixedSlot(PRIMITIVE_VALUE_SLOT).toSymbol();
+  }
+
+ private:
+  inline void setPrimitiveValue(JS::Symbol* symbol) {
+    setFixedSlot(PRIMITIVE_VALUE_SLOT, SymbolValue(symbol));
+  }
+
+  [[nodiscard]] static bool construct(JSContext* cx, unsigned argc, Value* vp);
+
+  // Static methods.
+  [[nodiscard]] static bool for_(JSContext* cx, unsigned argc, Value* vp);
+  [[nodiscard]] static bool keyFor(JSContext* cx, unsigned argc, Value* vp);
+
+  // Methods defined on Symbol.prototype.
+  [[nodiscard]] static bool toString_impl(JSContext* cx, const CallArgs& args);
+  [[nodiscard]] static bool toString(JSContext* cx, unsigned argc, Value* vp);
+  [[nodiscard]] static bool valueOf_impl(JSContext* cx, const CallArgs& args);
+  [[nodiscard]] static bool valueOf(JSContext* cx, unsigned argc, Value* vp);
+  [[nodiscard]] static bool toPrimitive(JSContext* cx, unsigned argc,
+                                        Value* vp);
+
+  // Properties defined on Symbol.prototype.
+  [[nodiscard]] static bool descriptionGetter_impl(JSContext* cx,
+                                                   const CallArgs& args);
+  [[nodiscard]] static bool descriptionGetter(JSContext* cx, unsigned argc,
+                                              Value* vp);
+
+  static const JSPropertySpec properties[];
+  static const JSFunctionSpec methods[];
+  static const JSFunctionSpec staticMethods[];
+  static const ClassSpec classSpec_;
+};
+
+} /* namespace js */
+
+#endif /* builtin_Symbol_h */