[clang-tools-extra] [clang-tidy] Add readability-use-span-first-last check (PR #118074)

[Baranov Victor via cfe-commits]

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@@ -0,0 +1,46 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_USESPANFIRSTLASTCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_USESPANFIRSTLASTCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::readability {
+
+/// Suggests using clearer 'std::span' member functions 'first()'/'last()'
+/// instead of equivalent 'subspan()' calls where applicable.
+///
+/// For the user-facing documentation see:
+/// https://clang.llvm.org/extra/clang-tidy/checks/readability/use-span-first-last.html
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vbvictor wrote:

Only this is needed, everything else is just .rst docs and could be removed from here

https://github.com/llvm/llvm-project/pull/118074