Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/js/src/frontend/TypedIndex.h b/js/src/frontend/TypedIndex.h
new file mode 100644
index 0000000000..c75d59ae3d
--- /dev/null
+++ b/js/src/frontend/TypedIndex.h
@@ -0,0 +1,42 @@
+/* -*- 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 frontend_TypedIndex_h
+#define frontend_TypedIndex_h
+
+#include <cstdint>
+#include <stddef.h>
+
+namespace js {
+namespace frontend {
+
+// TypedIndex allows discrimination in variants between different
+// index types. Used as a typesafe index for various stencil arrays.
+template <typename Tag>
+struct TypedIndex {
+  TypedIndex() = default;
+  constexpr explicit TypedIndex(uint32_t index) : index(index){};
+
+  uint32_t index = 0;
+
+  // For Vector::operator[]
+  operator size_t() const { return index; }
+
+  TypedIndex& operator=(size_t idx) {
+    index = idx;
+    return *this;
+  }
+
+  bool operator<(TypedIndex other) const { return index < other.index; }
+  bool operator<=(TypedIndex other) const { return index <= other.index; }
+  bool operator>(TypedIndex other) const { return index > other.index; }
+  bool operator>=(TypedIndex other) const { return index >= other.index; }
+};
+
+}  // namespace frontend
+}  // namespace js
+
+#endif