1 files changed, 126 insertions, 0 deletions
diff --git a/xpcom/string/nsTDependentString.h b/xpcom/string/nsTDependentString.h
new file mode 100644
index 0000000000..c7194a677f
--- /dev/null
+++ b/xpcom/string/nsTDependentString.h
@@ -0,0 +1,126 @@
+/* -*- 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 nsTDependentString_h
+#define nsTDependentString_h
+
+#include "nsTString.h"
+
+/**
+ * nsTDependentString
+ *
+ * Stores a null-terminated, immutable sequence of characters.
+ *
+ * Subclass of nsTString that restricts string value to an immutable
+ * character sequence.  This class does not own its data, so the creator
+ * of objects of this type must take care to ensure that a
+ * nsTDependentString continues to reference valid memory for the
+ * duration of its use.
+ */
+template <typename T>
+class nsTDependentString : public nsTString<T> {
+ public:
+  typedef nsTDependentString<T> self_type;
+  typedef nsTString<T> base_string_type;
+  typedef typename base_string_type::string_type string_type;
+
+  typedef typename base_string_type::fallible_t fallible_t;
+
+  typedef typename base_string_type::char_type char_type;
+  typedef typename base_string_type::char_traits char_traits;
+  typedef
+      typename base_string_type::incompatible_char_type incompatible_char_type;
+
+  typedef typename base_string_type::substring_tuple_type substring_tuple_type;
+
+  typedef typename base_string_type::const_iterator const_iterator;
+  typedef typename base_string_type::iterator iterator;
+
+  typedef typename base_string_type::comparator_type comparator_type;
+
+  typedef typename base_string_type::const_char_iterator const_char_iterator;
+
+  typedef typename base_string_type::string_view string_view;
+
+  typedef typename base_string_type::index_type index_type;
+  typedef typename base_string_type::size_type size_type;
+
+  // These are only for internal use within the string classes:
+  typedef typename base_string_type::DataFlags DataFlags;
+  typedef typename base_string_type::ClassFlags ClassFlags;
+
+ public:
+  /**
+   * constructors
+   */
+
+  nsTDependentString(const char_type* aStart, const char_type* aEnd);
+
+  nsTDependentString(const char_type* aData, size_type aLength)
+      : string_type(const_cast<char_type*>(aData), aLength,
+                    DataFlags::TERMINATED, ClassFlags(0)) {
+    this->AssertValidDependentString();
+  }
+
+#if defined(MOZ_USE_CHAR16_WRAPPER)
+  template <typename Q = T, typename EnableIfChar16 = mozilla::Char16OnlyT<Q>>
+  nsTDependentString(char16ptr_t aData, size_type aLength)
+      : nsTDependentString(static_cast<const char16_t*>(aData), aLength) {}
+#endif
+
+  explicit nsTDependentString(const char_type* aData)
+      : string_type(const_cast<char_type*>(aData), char_traits::length(aData),
+                    DataFlags::TERMINATED, ClassFlags(0)) {
+    string_type::AssertValidDependentString();
+  }
+
+#if defined(MOZ_USE_CHAR16_WRAPPER)
+  template <typename Q = T, typename EnableIfChar16 = mozilla::Char16OnlyT<Q>>
+  explicit nsTDependentString(char16ptr_t aData)
+      : nsTDependentString(static_cast<const char16_t*>(aData)) {}
+#endif
+
+  nsTDependentString(const string_type& aStr, index_type aStartPos)
+      : string_type() {
+    Rebind(aStr, aStartPos);
+  }
+
+  // Create a nsTDependentSubstring to be bound later
+  nsTDependentString() : string_type() {}
+
+  // auto-generated destructor OK
+
+  nsTDependentString(self_type&& aStr) : string_type() {
+    Rebind(aStr, /* aStartPos = */ 0);
+    aStr.SetToEmptyBuffer();
+  }
+
+  explicit nsTDependentString(const self_type& aStr) : string_type() {
+    Rebind(aStr, /* aStartPos = */ 0);
+  }
+
+  /**
+   * allow this class to be bound to a different string...
+   */
+
+  using nsTString<T>::Rebind;
+  void Rebind(const char_type* aData) {
+    Rebind(aData, char_traits::length(aData));
+  }
+
+  void Rebind(const char_type* aStart, const char_type* aEnd);
+  void Rebind(const string_type&, index_type aStartPos);
+
+ private:
+  // NOT USED
+  nsTDependentString(const substring_tuple_type&) = delete;
+  self_type& operator=(const self_type& aStr) = delete;
+};
+
+extern template class nsTDependentString<char>;
+extern template class nsTDependentString<char16_t>;
+
+#endif