[clang-tools-extra] Add clang-tidy check to suggest replacement of conditional statement with std::min/std::max (PR #77816)

[Piotr Zegar via cfe-commits]

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@@ -0,0 +1,32 @@
+//===--- ConditionaltostdminmaxCheck.h - clang-tidy -------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONDITIONALTOSTDMINMAXCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONDITIONALTOSTDMINMAXCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::readability {
+
+/// FIXME: replaces certain conditional statements with equivalent std::min or
+/// std::max expressions, improving readability and promoting the use of
+/// standard library functions."
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/readability/ConditionalToStdMinMax.html
+class ConditionaltostdminmaxCheck : public ClangTidyCheck {
+public:
+  ConditionaltostdminmaxCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+};
+
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PiotrZSL wrote:

Also ignore implicit code with TK_IgnoreUnlessSpelledInSource then you wont need those ignoringImpCasts

https://github.com/llvm/llvm-project/pull/77816