12#if U_SHOW_CPLUSPLUS_API || U_SHOW_CPLUSPLUS_HEADER_API
32#ifdef U_ALIASING_BARRIER
34#elif (defined(__clang__) || defined(__GNUC__)) && U_PLATFORM != U_PF_BROWSER_NATIVE_CLIENT
35# define U_ALIASING_BARRIER(ptr) asm volatile("" : : "rm"(ptr) : "memory")
36#elif defined(U_IN_DOXYGEN)
37# define U_ALIASING_BARRIER(ptr)
41#if U_SHOW_CPLUSPLUS_API
57#if !U_CHAR16_IS_TYPEDEF
65#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
91 inline char16_t *
get()
const;
97 inline operator char16_t *()
const {
return get(); }
102#ifdef U_ALIASING_BARRIER
103 template<
typename T>
static char16_t *cast(T *t) {
105 return reinterpret_cast<char16_t *
>(t);
119#ifdef U_ALIASING_BARRIER
121Char16Ptr::Char16Ptr(
char16_t *p) : p_(p) {}
122#if !U_CHAR16_IS_TYPEDEF
125#if U_SIZEOF_WCHAR_T==2
138#if !U_CHAR16_IS_TYPEDEF
141#if U_SIZEOF_WCHAR_T==2
164#if !U_CHAR16_IS_TYPEDEF
172#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
199 inline const char16_t *
get()
const;
205 inline operator const char16_t *()
const {
return get(); }
210#ifdef U_ALIASING_BARRIER
211 template<
typename T>
static const char16_t *cast(
const T *t) {
213 return reinterpret_cast<const char16_t *
>(t);
227#ifdef U_ALIASING_BARRIER
230#if !U_CHAR16_IS_TYPEDEF
233#if U_SIZEOF_WCHAR_T==2
246#if !U_CHAR16_IS_TYPEDEF
249#if U_SIZEOF_WCHAR_T==2
265#if U_SHOW_CPLUSPLUS_API || U_SHOW_CPLUSPLUS_HEADER_API
267namespace U_ICU_NAMESPACE_OR_INTERNAL {
269#ifndef U_FORCE_HIDE_INTERNAL_API
271template<
typename T,
typename = std::enable_if_t<std::is_same_v<T, UChar>>>
273 if constexpr (std::is_same_v<UChar, char16_t>) {
276#if U_SHOW_CPLUSPLUS_API
277 return ConstChar16Ptr(p).get();
279#ifdef U_ALIASING_BARRIER
282 return reinterpret_cast<const char16_t *
>(p);
296#ifdef U_ALIASING_BARRIER
299 return reinterpret_cast<const UChar *
>(p);
310#ifdef U_ALIASING_BARRIER
313 return reinterpret_cast<UChar *
>(p);
324#ifdef U_ALIASING_BARRIER
327 return reinterpret_cast<const OldUChar *
>(p);
338#ifdef U_ALIASING_BARRIER
341 return reinterpret_cast<OldUChar *
>(p);
349#if U_SHOW_CPLUSPLUS_API
353#ifndef U_FORCE_HIDE_INTERNAL_API
360 std::is_convertible_v<T, std::u16string_view>
361#if !U_CHAR16_IS_TYPEDEF && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 180000)
362 || std::is_convertible_v<T, std::basic_string_view<uint16_t>>
364#if U_SIZEOF_WCHAR_T==2
365 || std::is_convertible_v<T, std::wstring_view>
376#if !U_CHAR16_IS_TYPEDEF && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 180000)
387#if U_SIZEOF_WCHAR_T==2
393inline std::u16string_view toU16StringView(std::wstring_view sv) {
403 typename =
typename std::enable_if_t<!std::is_pointer_v<std::remove_reference_t<T>>>>
413 typename =
typename std::enable_if_t<std::is_pointer_v<std::remove_reference_t<T>>>,
416 if (text ==
nullptr)
return {};
const OldUChar * toOldUCharPtr(const char16_t *p)
Converts from const char16_t * to const OldUChar *.
std::u16string_view toU16StringView(std::u16string_view sv)
Pass-through overload.
const char16_t * uprv_char16PtrFromUChar(const T *p)
const UChar * toUCharPtr(const char16_t *p)
Converts from const char16_t * to const UChar *.
std::u16string_view toU16StringViewNullable(const T &text)
Pass-through overload.
#define U_ALIASING_BARRIER(ptr)
Barrier for pointer anti-aliasing optimizations even across function boundaries.
char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
Char16Ptr(std::nullptr_t p)
nullptr constructor.
Char16Ptr(uint16_t *p)
Converts the pointer to char16_t *.
Char16Ptr(wchar_t *p)
Converts the pointer to char16_t *.
Char16Ptr(char16_t *p)
Copies the pointer.
char16_t * get() const
Pointer access.
const char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
ConstChar16Ptr(const char16_t *p)
Copies the pointer.
ConstChar16Ptr(const uint16_t *p)
Converts the pointer to char16_t *.
~ConstChar16Ptr()
Destructor.
const char16_t * get() const
Pointer access.
ConstChar16Ptr(const wchar_t *p)
Converts the pointer to char16_t *.
ConstChar16Ptr(const std::nullptr_t p)
nullptr constructor.
constexpr bool ConvertibleToU16StringView
Is T convertible to a std::u16string_view or some other 16-bit string view?
char16_t UChar
The base type for UTF-16 code units and pointers.
uint16_t OldUChar
Default ICU 58 definition of UChar.
Basic definitions for ICU, for both C and C++ APIs.
#define U_COMMON_API
Set to export library symbols from inside the common library, and to import them from outside.