From 91c4c568d6dfa6b630e1f4e7656c5c89e7fb9061 Mon Sep 17 00:00:00 2001
From: Andi-Bogdan Postelnicu <bpostelnicu@mozilla.com>
Date: Tue, 18 Apr 2023 12:42:13 +0000
Subject: [PATCH] Bug 1679492 - Remove parts that are unused from
 mfbt/TemplateLib. r=sergesanspaille

Some implementations from TemplateLib are easily changeable with std functionality.
mozilla::tl::And has been removed and replaced with std::conjuction

Differential Revision: https://phabricator.services.mozilla.com/D175762
---
 mfbt/TemplateLib.h             | 12 ------------
 mfbt/tests/TestTemplateLib.cpp | 30 ------------------------------
 mfbt/tests/moz.build           |  1 -
 testing/cppunittest.ini        |  1 -
 4 files changed, 44 deletions(-)
 delete mode 100644 mfbt/tests/TestTemplateLib.cpp

diff --git a/mfbt/TemplateLib.h b/mfbt/TemplateLib.h
index ff7a62e63c60..8c620390b390 100644
--- a/mfbt/TemplateLib.h
+++ b/mfbt/TemplateLib.h
@@ -119,18 +119,6 @@ struct MulOverflowMask<1> {
   static const size_t value = 0;
 };
 
-/**
- * And<bool...> computes the logical 'and' of its argument booleans.
- *
- * Examples:
- *   mozilla::t1::And<true, true>::value is true.
- *   mozilla::t1::And<true, false>::value is false.
- *   mozilla::t1::And<>::value is true.
- */
-
-template <bool... C>
-struct And : std::integral_constant<bool, (C && ...)> {};
-
 }  // namespace tl
 
 }  // namespace mozilla
diff --git a/mfbt/tests/TestTemplateLib.cpp b/mfbt/tests/TestTemplateLib.cpp
deleted file mode 100644
index ac8c6d268a57..000000000000
--- a/mfbt/tests/TestTemplateLib.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/* -*- 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/. */
-
-#include "mozilla/TemplateLib.h"
-
-using mozilla::tl::And;
-
-static_assert(And<>::value == true, "And<>::value should be true");
-static_assert(And<true>::value == true, "And<true>::value should be true");
-static_assert(And<false>::value == false, "And<false>::value should be false");
-static_assert(And<false, true>::value == false,
-              "And<false, true>::value should be false");
-static_assert(And<false, false>::value == false,
-              "And<false, false>::value should be false");
-static_assert(And<true, false>::value == false,
-              "And<true, false>::value should be false");
-static_assert(And<true, true>::value == true,
-              "And<true, true>::value should be true");
-static_assert(And<true, true, true>::value == true,
-              "And<true, true, true>::value should be true");
-static_assert(And<true, false, true>::value == false,
-              "And<true, false, true>::value should be false");
-
-int main() {
-  // Nothing to do here.
-  return 0;
-}
diff --git a/mfbt/tests/moz.build b/mfbt/tests/moz.build
index bc385ba25fe8..21b25b8afaed 100644
--- a/mfbt/tests/moz.build
+++ b/mfbt/tests/moz.build
@@ -60,7 +60,6 @@ CppUnitTests(
         "TestSIMD",
         "TestSmallPointerArray",
         "TestSplayTree",
-        "TestTemplateLib",
         "TestTextUtils",
         "TestTypedEnum",
         "TestUniquePtr",
diff --git a/testing/cppunittest.ini b/testing/cppunittest.ini
index 1b872668620b..471f6fe2e89b 100644
--- a/testing/cppunittest.ini
+++ b/testing/cppunittest.ini
@@ -82,7 +82,6 @@ skip-if = asan || tsan  # Not built on sanitizer builds
 [TestSPSCQueue]
 [TestStackCookie]
 skip-if = os != 'win'
-[TestTemplateLib]
 [TestTextUtils]
 [TestThreadSafeWeakPtr]
 [TestTypedEnum]