From 0f205863465e88335d782e2e9c9ace81c9878727 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Mon, 20 Feb 2023 08:08:40 -0500
Subject: [PATCH] AK: Add formatters for Utf8View and Utf32View

Useful for debugging, especially in templated contexts.
---
 AK/CMakeLists.txt |  1 +
 AK/Utf32View.cpp  | 17 +++++++++++++++++
 AK/Utf32View.h    |  6 ++++++
 AK/Utf8View.cpp   |  5 +++++
 AK/Utf8View.h     |  6 ++++++
 5 files changed, 35 insertions(+)
 create mode 100644 AK/Utf32View.cpp

diff --git a/AK/CMakeLists.txt b/AK/CMakeLists.txt
index 1188c0f916..72e513c60a 100644
--- a/AK/CMakeLists.txt
+++ b/AK/CMakeLists.txt
@@ -33,6 +33,7 @@ set(AK_SOURCES
     URL.cpp
     URLParser.cpp
     Utf16View.cpp
+    Utf32View.cpp
     Utf8View.cpp
     UUID.cpp
 )
diff --git a/AK/Utf32View.cpp b/AK/Utf32View.cpp
new file mode 100644
index 0000000000..de18abb958
--- /dev/null
+++ b/AK/Utf32View.cpp
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/StringBuilder.h>
+#include <AK/Utf32View.h>
+
+namespace AK {
+
+ErrorOr<void> Formatter<Utf32View>::format(FormatBuilder& builder, Utf32View const& string)
+{
+    return builder.builder().try_append(string);
+}
+
+}
diff --git a/AK/Utf32View.h b/AK/Utf32View.h
index 9c116954c4..2c3c122f99 100644
--- a/AK/Utf32View.h
+++ b/AK/Utf32View.h
@@ -8,6 +8,7 @@
 
 #include <AK/Assertions.h>
 #include <AK/Checked.h>
+#include <AK/Format.h>
 #include <AK/Types.h>
 
 namespace AK {
@@ -119,6 +120,11 @@ private:
     size_t m_length { 0 };
 };
 
+template<>
+struct Formatter<Utf32View> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder&, Utf32View const&);
+};
+
 }
 
 #if USING_AK_GLOBALLY
diff --git a/AK/Utf8View.cpp b/AK/Utf8View.cpp
index 5ebfccedfd..27f44e0b26 100644
--- a/AK/Utf8View.cpp
+++ b/AK/Utf8View.cpp
@@ -303,4 +303,9 @@ Optional<u32> Utf8CodePointIterator::peek(size_t offset) const
     return *new_iterator;
 }
 
+ErrorOr<void> Formatter<Utf8View>::format(FormatBuilder& builder, Utf8View const& string)
+{
+    return Formatter<StringView>::format(builder, string.as_string());
+}
+
 }
diff --git a/AK/Utf8View.h b/AK/Utf8View.h
index 624eab7cbd..e9f7e7635c 100644
--- a/AK/Utf8View.h
+++ b/AK/Utf8View.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <AK/DeprecatedString.h>
+#include <AK/Format.h>
 #include <AK/StringView.h>
 #include <AK/Types.h>
 
@@ -164,6 +165,11 @@ private:
     Utf8CodePointIterator m_it;
 };
 
+template<>
+struct Formatter<Utf8View> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder&, Utf8View const&);
+};
+
 }
 
 #if USING_AK_GLOBALLY