================
@@ -0,0 +1,174 @@
+//===--- NumericLiteralCaseFixer.cpp -----------------------*- 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 implements NumericLiteralCaseFixer that standardizes character
+/// case within numeric literal constants.
+///
+//===----------------------------------------------------------------------===//
+
+#include "NumericLiteralCaseFixer.h"
+#include "NumericLiteralInfo.h"
+
+#include "llvm/ADT/StringExtras.h"
+
+#include <algorithm>
+
+namespace clang {
+namespace format {
+
+static bool isNumericLiteralCaseFixerNeeded(const FormatStyle &Style) {
+ // Check if language is supported.
+ switch (Style.Language) {
+ case FormatStyle::LK_C:
+ case FormatStyle::LK_Cpp:
+ case FormatStyle::LK_ObjC:
+ case FormatStyle::LK_CSharp:
+ case FormatStyle::LK_Java:
+ case FormatStyle::LK_JavaScript:
+ break;
+ default:
+ return false;
+ }
+
+ // Check if style options are set.
+ const FormatStyle::NumericLiteralCaseStyle LeaveAllCasesUntouched{};
+ return Style.NumericLiteralCase != LeaveAllCasesUntouched;
+}
+
+static std::string
+transformComponent(StringRef Component,
+ FormatStyle::NumericLiteralComponentStyle ConfigValue) {
+ switch (ConfigValue) {
+ case FormatStyle::NLCS_Upper:
+ return Component.upper();
+ case FormatStyle::NLCS_Lower:
+ return Component.lower();
+ case FormatStyle::NLCS_Leave:
+ default:
+ return Component.str();
+ }
+}
+
+/// @brief Test if Suffix matches a C++ literal reserved by the library.
+/// Matches against all suffixes reserved in the C++23 standard
+static bool matchesReservedSuffix(StringRef Suffix) {
+ static constexpr std::array<StringRef, 11> SortedReservedSuffixes = {
+ "d", "h", "i", "if", "il", "min", "ms", "ns", "s", "us", "y"};
+
+ // This can be static_assert when we have access to constexpr is_sorted in
+ // C++ 20.
+ assert(llvm::is_sorted(SortedReservedSuffixes) &&
+ "Must be sorted as precondition for lower_bound().");
+
+ auto entry = llvm::lower_bound(SortedReservedSuffixes, Suffix);
+ if (entry == SortedReservedSuffixes.cend())
+ return false;
+ return *entry == Suffix;
+}
+
+static std::string format(StringRef IntegerLiteral, const FormatStyle &Style) {
----------------
owenca wrote:
```suggestion
static std::string format(StringRef NumericLiteral, const FormatStyle &Style) {
```
as suggested before.
https://github.com/llvm/llvm-project/pull/151590
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