[libcxx-commits] [libcxx] [libc++] Prevent calling the projection more than three times (PR #66315)

[Jocelyn Castellano via libcxx-commits]

https://github.com/pandaninjas updated https://github.com/llvm/llvm-project/pull/66315:

>From ead65bfcb70be46788bc9e88c891e7ae7f91b8d7 Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 17:38:17 -0700
Subject: [PATCH 1/4] [libc++] Prevent calling the projection more than three
 times

---
 libcxx/include/__algorithm/ranges_clamp.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 9613f7f37720a6c..ca46675eb4b3041 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,9 +37,10 @@ struct __fn {
     _LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
                                  "Bad bounds passed to std::ranges::clamp");
 
-    if (std::invoke(__comp, std::invoke(__proj, __value), std::invoke(__proj, __low)))
+    auto &projection = std::invoke(__proj, __value);
+    if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
       return __low;
-    else if (std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __value)))
+    else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
       return __high;
     else
       return __value;

>From c18d60870ac342a95a5528396a8e0c7b91717cbb Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 18:56:44 -0700
Subject: [PATCH 2/4] [libc++] Run clang-format on file

---
 libcxx/include/__algorithm/ranges_clamp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index ca46675eb4b3041..3469a6419b2270f 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,7 +37,7 @@ struct __fn {
     _LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
                                  "Bad bounds passed to std::ranges::clamp");
 
-    auto &projection = std::invoke(__proj, __value);
+    auto& projection = std::invoke(__proj, __value);
     if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
       return __low;
     else if (std::invoke(__comp, std::invoke(__proj, __high), projection))

>From b40e791f0e9fedbb19936851e1e71decf00331fa Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 19:11:20 -0700
Subject: [PATCH 3/4] [libcxx] CamelCase projection and make variable name more
 descriptive

---
 libcxx/include/__algorithm/ranges_clamp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 3469a6419b2270f..3adb5fa828e1ee5 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,7 +37,7 @@ struct __fn {
     _LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
                                  "Bad bounds passed to std::ranges::clamp");
 
-    auto& projection = std::invoke(__proj, __value);
+    auto& ValueProjection = std::invoke(__proj, __value);
     if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
       return __low;
     else if (std::invoke(__comp, std::invoke(__proj, __high), projection))

>From a8907624defa4cc4f47520a2d93a8bd042816aa2 Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 19:11:47 -0700
Subject: [PATCH 4/4] [libcxx] properly change variable name

---
 libcxx/include/__algorithm/ranges_clamp.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 3adb5fa828e1ee5..3d7a224b3649a3f 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -38,9 +38,9 @@ struct __fn {
                                  "Bad bounds passed to std::ranges::clamp");
 
     auto& ValueProjection = std::invoke(__proj, __value);
-    if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
+    if (std::invoke(__comp, ValueProjection, std::invoke(__proj, __low)))
       return __low;
-    else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
+    else if (std::invoke(__comp, std::invoke(__proj, __high), ValueProjection))
       return __high;
     else
       return __value;