[clang] [clang-format] Add an option to format integer and float literal case (PR #151590)

[Andy MacGregor via cfe-commits]

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@@ -0,0 +1,35 @@
+//===--- NumericLiteralCaseFixer.h -------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file declares NumericLiteralCaseFixer that standardizes character case
+/// within numeric literal constants.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_FORMAT_NUMERICLITERALCASEFIXER_H
+#define LLVM_CLANG_LIB_FORMAT_NUMERICLITERALCASEFIXER_H
+
+#include "TokenAnalyzer.h"
+
+namespace clang {
+namespace format {
+
+class NumericLiteralCaseFixer {
+public:
+  std::pair<tooling::Replacements, unsigned> process(const Environment &Env,
+                                                     const FormatStyle &Style);
+
+  /// Return true if this pass should be added to the formatting run.
+  static bool isActive(const FormatStyle &Style);
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30Wedge wrote:

Done. Note that [this conflicts with this comment.](https://github.com/llvm/llvm-project/pull/151590#discussion_r2246406293)

https://github.com/llvm/llvm-project/pull/151590