From 0e1d3c5675a1cdcc56ba805091595cffc3f7fbda Mon Sep 17 00:00:00 2001
From: Daniel Cheng <dcheng@chromium.org>
Date: Mon, 3 Apr 2023 15:51:18 -0700
Subject: [PATCH] Add reference, pointer, and co type aliases for
 rtc::ArrayView.

Many STL containers define these type aliases, and they are easier to
work with than add_const_t<add_lvalue_reference_t<value_type>>.

In a followup, `WTF::Vector` in Blink's conversion constructor from
other containers will be SFINAE-guarded using these type aliases.

Bug: chromium:1408442
Change-Id: I7790e6f462a32e7e49bc6468afeda6b2e6d4b631
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/300180
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#39771}
---
 api/array_view.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/api/array_view.h b/api/array_view.h
index 2d68f1650f..7e01959b01 100644
--- a/api/array_view.h
+++ b/api/array_view.h
@@ -149,6 +149,10 @@ template <typename T,
 class ArrayView final : public array_view_internal::ArrayViewBase<T, Size> {
  public:
   using value_type = T;
+  using reference = value_type&;
+  using const_reference = const value_type&;
+  using pointer = value_type*;
+  using const_pointer = const value_type*;
   using const_iterator = const T*;
 
   // Construct an ArrayView from a pointer and a length.