From 632ff01e174f4efc0da6dc9f2170932a3c400fde Mon Sep 17 00:00:00 2001
From: asynts <asynts@gmail.com>
Date: Fri, 1 Jan 2021 23:34:00 +0100
Subject: [PATCH] Piggyback: AK: Add formatter for std::nullptr_t.

---
 AK/Format.h             | 11 +++++++++++
 AK/Tests/TestFormat.cpp |  5 +++++
 2 files changed, 16 insertions(+)

diff --git a/AK/Format.h b/AK/Format.h
index ea2bd6edf7..90030765ec 100644
--- a/AK/Format.h
+++ b/AK/Format.h
@@ -348,6 +348,17 @@ struct Formatter<double> : StandardFormatter {
 };
 #endif
 
+template<>
+struct Formatter<std::nullptr_t> : Formatter<FlatPtr> {
+    void format(FormatBuilder& builder, std::nullptr_t)
+    {
+        if (m_mode == Mode::Default)
+            m_mode = Mode::Pointer;
+
+        return Formatter<FlatPtr>::format(builder, 0);
+    }
+};
+
 void vformat(StringBuilder& builder, StringView fmtstr, TypeErasedFormatParams);
 void vformat(const LogStream& stream, StringView fmtstr, TypeErasedFormatParams);
 
diff --git a/AK/Tests/TestFormat.cpp b/AK/Tests/TestFormat.cpp
index bcf9b91889..cfe7fe2950 100644
--- a/AK/Tests/TestFormat.cpp
+++ b/AK/Tests/TestFormat.cpp
@@ -269,4 +269,9 @@ TEST_CASE(yay_this_implementation_sucks)
     EXPECT_EQ(String::formatted("{:.0}", .99999999999), "0.");
 }
 
+TEST_CASE(format_nullptr)
+{
+    EXPECT_EQ(String::formatted("{}", nullptr), String::formatted("{:p}", static_cast<FlatPtr>(0)));
+}
+
 TEST_MAIN(Format)