chromium/base/strings/string_util_internal.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_STRINGS_STRING_UTIL_INTERNAL_H_
#define BASE_STRINGS_STRING_UTIL_INTERNAL_H_

#include <concepts>
#include <string_view>
#include <type_traits>

#include "base/ranges/algorithm.h"

namespace base::internal {

// ASCII-specific tolower.  The standard library's tolower is locale sensitive,
// so we don't want to use it here.
template <typename CharT>
  requires(std::integral<CharT>)
constexpr CharT ToLowerASCII(CharT c) { … }

template <typename T>
  requires(std::integral<typename T::value_type>)
constexpr int CompareCaseInsensitiveASCIIT(T a, T b) { … }

template <typename CharT, typename CharU>
inline bool EqualsCaseInsensitiveASCIIT(std::basic_string_view<CharT> a,
                                        std::basic_string_view<CharU> b) { … }

}  // namespace base::internal

#endif  // BASE_STRINGS_STRING_UTIL_INTERNAL_H_