Gecko [ tanishkshah.com ]

Name	Size	Permission	Date
alphaindex.h	26.43 KB	-rw-r--r--	2026-05-29 16:59
appendable.h	8.54 KB	-rw-r--r--	2026-05-29 16:59
basictz.h	9.99 KB	-rw-r--r--	2026-05-29 16:59
brkiter.h	28.52 KB	-rw-r--r--	2026-05-29 16:59
bytestream.h	11.79 KB	-rw-r--r--	2026-05-29 16:59
bytestrie.h	20.83 KB	-rw-r--r--	2026-05-29 16:59
bytestriebuilder.h	7.44 KB	-rw-r--r--	2026-05-29 16:59
calendar.h	110.47 KB	-rw-r--r--	2026-05-29 16:59
caniter.h	7.47 KB	-rw-r--r--	2026-05-29 16:59
casemap.h	25.42 KB	-rw-r--r--	2026-05-29 16:59
char16ptr.h	10.79 KB	-rw-r--r--	2026-05-29 16:59
chariter.h	23.79 KB	-rw-r--r--	2026-05-29 16:59
choicfmt.h	23.99 KB	-rw-r--r--	2026-05-29 16:59
coleitr.h	13.78 KB	-rw-r--r--	2026-05-29 16:59
coll.h	59.5 KB	-rw-r--r--	2026-05-29 16:59
compactdecimalformat.h	6.88 KB	-rw-r--r--	2026-05-29 16:59
curramt.h	3.67 KB	-rw-r--r--	2026-05-29 16:59
currpinf.h	7.3 KB	-rw-r--r--	2026-05-29 16:59
currunit.h	4.02 KB	-rw-r--r--	2026-05-29 16:59
datefmt.h	41.29 KB	-rw-r--r--	2026-05-29 16:59
dbbi.h	1.19 KB	-rw-r--r--	2026-05-29 16:59
dcfmtsym.h	21.27 KB	-rw-r--r--	2026-05-29 16:59
decimfmt.h	87.45 KB	-rw-r--r--	2026-05-29 16:59
displayoptions.h	7.08 KB	-rw-r--r--	2026-05-29 16:59
docmain.h	7.66 KB	-rw-r--r--	2026-05-29 16:59
dtfmtsym.h	41.04 KB	-rw-r--r--	2026-05-29 16:59
dtintrv.h	3.84 KB	-rw-r--r--	2026-05-29 16:59
dtitvfmt.h	49.2 KB	-rw-r--r--	2026-05-29 16:59
dtitvinf.h	18.54 KB	-rw-r--r--	2026-05-29 16:59
dtptngen.h	29.28 KB	-rw-r--r--	2026-05-29 16:59
dtrule.h	8.66 KB	-rw-r--r--	2026-05-29 16:59
edits.h	20.74 KB	-rw-r--r--	2026-05-29 16:59
enumset.h	2.08 KB	-rw-r--r--	2026-05-29 16:59
errorcode.h	4.84 KB	-rw-r--r--	2026-05-29 16:59
fieldpos.h	8.69 KB	-rw-r--r--	2026-05-29 16:59
filteredbrk.h	5.37 KB	-rw-r--r--	2026-05-29 16:59
fmtable.h	24.36 KB	-rw-r--r--	2026-05-29 16:59
format.h	12.78 KB	-rw-r--r--	2026-05-29 16:59
formattednumber.h	6.25 KB	-rw-r--r--	2026-05-29 16:59
formattedvalue.h	9.75 KB	-rw-r--r--	2026-05-29 16:59
fpositer.h	3.03 KB	-rw-r--r--	2026-05-29 16:59
gender.h	3.35 KB	-rw-r--r--	2026-05-29 16:59
gregocal.h	30.05 KB	-rw-r--r--	2026-05-29 16:59
icudataver.h	1.02 KB	-rw-r--r--	2026-05-29 16:59
icuplug.h	12.1 KB	-rw-r--r--	2026-05-29 16:59
idna.h	12.93 KB	-rw-r--r--	2026-05-29 16:59
listformatter.h	8.59 KB	-rw-r--r--	2026-05-29 16:59
localebuilder.h	11.09 KB	-rw-r--r--	2026-05-29 16:59
localematcher.h	26.86 KB	-rw-r--r--	2026-05-29 16:59
localpointer.h	19.52 KB	-rw-r--r--	2026-05-29 16:59
locdspnm.h	7.12 KB	-rw-r--r--	2026-05-29 16:59
locid.h	53.98 KB	-rw-r--r--	2026-05-29 16:59
measfmt.h	11.41 KB	-rw-r--r--	2026-05-29 16:59
measunit.h	133.12 KB	-rw-r--r--	2026-05-29 16:59
measure.h	4.63 KB	-rw-r--r--	2026-05-29 16:59
messageformat2.h	21.59 KB	-rw-r--r--	2026-05-29 16:59
messageformat2_arguments.h	3.84 KB	-rw-r--r--	2026-05-29 16:59
messageformat2_data_model.h	96.61 KB	-rw-r--r--	2026-05-29 16:59
messageformat2_data_model_names.h	784 B	-rw-r--r--	2026-05-29 16:59
messageformat2_formattable.h	39.37 KB	-rw-r--r--	2026-05-29 16:59
messageformat2_function_registry.h	18.07 KB	-rw-r--r--	2026-05-29 16:59
messagepattern.h	33.79 KB	-rw-r--r--	2026-05-29 16:59
msgfmt.h	44.94 KB	-rw-r--r--	2026-05-29 16:59
normalizer2.h	34.68 KB	-rw-r--r--	2026-05-29 16:59
normlzr.h	30.79 KB	-rw-r--r--	2026-05-29 16:59
nounit.h	2.24 KB	-rw-r--r--	2026-05-29 16:59
numberformatter.h	90.72 KB	-rw-r--r--	2026-05-29 16:59
numberrangeformatter.h	25.68 KB	-rw-r--r--	2026-05-29 16:59
numfmt.h	50.16 KB	-rw-r--r--	2026-05-29 16:59
numsys.h	7.22 KB	-rw-r--r--	2026-05-29 16:59
parseerr.h	3.08 KB	-rw-r--r--	2026-05-29 16:59
parsepos.h	5.56 KB	-rw-r--r--	2026-05-29 16:59
platform.h	27.19 KB	-rw-r--r--	2026-05-29 16:59
plurfmt.h	25.46 KB	-rw-r--r--	2026-05-29 16:59
plurrule.h	20.63 KB	-rw-r--r--	2026-05-29 16:59
ptypes.h	2.16 KB	-rw-r--r--	2026-05-29 16:59
putil.h	6.32 KB	-rw-r--r--	2026-05-29 16:59
rbbi.h	31.73 KB	-rw-r--r--	2026-05-29 16:59
rbnf.h	57.19 KB	-rw-r--r--	2026-05-29 16:59
rbtz.h	15.75 KB	-rw-r--r--	2026-05-29 16:59
regex.h	83.83 KB	-rw-r--r--	2026-05-29 16:59
region.h	9.2 KB	-rw-r--r--	2026-05-29 16:59
reldatefmt.h	22.69 KB	-rw-r--r--	2026-05-29 16:59
rep.h	9.38 KB	-rw-r--r--	2026-05-29 16:59
resbund.h	18.02 KB	-rw-r--r--	2026-05-29 16:59
schriter.h	6.09 KB	-rw-r--r--	2026-05-29 16:59
scientificnumberformatter.h	6.44 KB	-rw-r--r--	2026-05-29 16:59
search.h	22.21 KB	-rw-r--r--	2026-05-29 16:59
selfmt.h	14.35 KB	-rw-r--r--	2026-05-29 16:59
simpleformatter.h	12.6 KB	-rw-r--r--	2026-05-29 16:59
simplenumberformatter.h	8.87 KB	-rw-r--r--	2026-05-29 16:59
simpletz.h	45.62 KB	-rw-r--r--	2026-05-29 16:59
smpdtfmt.h	57.57 KB	-rw-r--r--	2026-05-29 16:59
sortkey.h	11.13 KB	-rw-r--r--	2026-05-29 16:59
std_string.h	1.05 KB	-rw-r--r--	2026-05-29 16:59
strenum.h	9.96 KB	-rw-r--r--	2026-05-29 16:59
stringoptions.h	5.79 KB	-rw-r--r--	2026-05-29 16:59
stringpiece.h	10.29 KB	-rw-r--r--	2026-05-29 16:59
stringtriebuilder.h	15.53 KB	-rw-r--r--	2026-05-29 16:59
stsearch.h	21.43 KB	-rw-r--r--	2026-05-29 16:59
symtable.h	4.28 KB	-rw-r--r--	2026-05-29 16:59
tblcoll.h	38.79 KB	-rw-r--r--	2026-05-29 16:59
timezone.h	45.59 KB	-rw-r--r--	2026-05-29 16:59
tmunit.h	3.37 KB	-rw-r--r--	2026-05-29 16:59
tmutamt.h	4.9 KB	-rw-r--r--	2026-05-29 16:59
tmutfmt.h	7.42 KB	-rw-r--r--	2026-05-29 16:59
translit.h	65.81 KB	-rw-r--r--	2026-05-29 16:59
tzfmt.h	44.76 KB	-rw-r--r--	2026-05-29 16:59
tznames.h	16.85 KB	-rw-r--r--	2026-05-29 16:59
tzrule.h	34.81 KB	-rw-r--r--	2026-05-29 16:59
tztrans.h	6.11 KB	-rw-r--r--	2026-05-29 16:59
ubidi.h	89.61 KB	-rw-r--r--	2026-05-29 16:59
ubiditransform.h	12.71 KB	-rw-r--r--	2026-05-29 16:59
ubrk.h	24.43 KB	-rw-r--r--	2026-05-29 16:59
ucal.h	63.95 KB	-rw-r--r--	2026-05-29 16:59
ucasemap.h	15.27 KB	-rw-r--r--	2026-05-29 16:59
ucat.h	5.35 KB	-rw-r--r--	2026-05-29 16:59
uchar.h	152.33 KB	-rw-r--r--	2026-05-29 16:59
ucharstrie.h	22.59 KB	-rw-r--r--	2026-05-29 16:59
ucharstriebuilder.h	7.48 KB	-rw-r--r--	2026-05-29 16:59
uchriter.h	13.24 KB	-rw-r--r--	2026-05-29 16:59
uclean.h	11.21 KB	-rw-r--r--	2026-05-29 16:59
ucnv.h	83.34 KB	-rw-r--r--	2026-05-29 16:59
ucnv_cb.h	6.58 KB	-rw-r--r--	2026-05-29 16:59
ucnv_err.h	20.98 KB	-rw-r--r--	2026-05-29 16:59
ucnvsel.h	6.24 KB	-rw-r--r--	2026-05-29 16:59
ucol.h	67.35 KB	-rw-r--r--	2026-05-29 16:59
ucoleitr.h	9.82 KB	-rw-r--r--	2026-05-29 16:59
uconfig.h	12.56 KB	-rw-r--r--	2026-05-29 16:59
ucpmap.h	5.54 KB	-rw-r--r--	2026-05-29 16:59
ucptrie.h	22.51 KB	-rw-r--r--	2026-05-29 16:59
ucsdet.h	14.69 KB	-rw-r--r--	2026-05-29 16:59
ucurr.h	16.72 KB	-rw-r--r--	2026-05-29 16:59
udat.h	62.66 KB	-rw-r--r--	2026-05-29 16:59
udata.h	15.63 KB	-rw-r--r--	2026-05-29 16:59
udateintervalformat.h	11.93 KB	-rw-r--r--	2026-05-29 16:59
udatpg.h	30.13 KB	-rw-r--r--	2026-05-29 16:59
udisplaycontext.h	5.94 KB	-rw-r--r--	2026-05-29 16:59
udisplayoptions.h	8.86 KB	-rw-r--r--	2026-05-29 16:59
uenum.h	7.79 KB	-rw-r--r--	2026-05-29 16:59
ufieldpositer.h	4.41 KB	-rw-r--r--	2026-05-29 16:59
uformattable.h	10.97 KB	-rw-r--r--	2026-05-29 16:59
uformattednumber.h	8.09 KB	-rw-r--r--	2026-05-29 16:59
uformattedvalue.h	12.25 KB	-rw-r--r--	2026-05-29 16:59
ugender.h	2.06 KB	-rw-r--r--	2026-05-29 16:59
uidna.h	34.12 KB	-rw-r--r--	2026-05-29 16:59
uiter.h	22.75 KB	-rw-r--r--	2026-05-29 16:59
uldnames.h	10.48 KB	-rw-r--r--	2026-05-29 16:59
ulistformatter.h	10.78 KB	-rw-r--r--	2026-05-29 16:59
uloc.h	55.38 KB	-rw-r--r--	2026-05-29 16:59
ulocale.h	6.31 KB	-rw-r--r--	2026-05-29 16:59
ulocbuilder.h	16.69 KB	-rw-r--r--	2026-05-29 16:59
ulocdata.h	11.3 KB	-rw-r--r--	2026-05-29 16:59
umachine.h	15.25 KB	-rw-r--r--	2026-05-29 16:59
umisc.h	1.34 KB	-rw-r--r--	2026-05-29 16:59
umsg.h	24.25 KB	-rw-r--r--	2026-05-29 16:59
umutablecptrie.h	8.3 KB	-rw-r--r--	2026-05-29 16:59
unifilt.h	4 KB	-rw-r--r--	2026-05-29 16:59
unifunct.h	4.05 KB	-rw-r--r--	2026-05-29 16:59
unimatch.h	6.1 KB	-rw-r--r--	2026-05-29 16:59
unirepl.h	3.38 KB	-rw-r--r--	2026-05-29 16:59
uniset.h	70.18 KB	-rw-r--r--	2026-05-29 16:59
unistr.h	184.51 KB	-rw-r--r--	2026-05-29 16:59
unorm.h	20.55 KB	-rw-r--r--	2026-05-29 16:59
unorm2.h	25.66 KB	-rw-r--r--	2026-05-29 16:59
unum.h	55.16 KB	-rw-r--r--	2026-05-29 16:59
unumberformatter.h	19.68 KB	-rw-r--r--	2026-05-29 16:59
unumberoptions.h	5.23 KB	-rw-r--r--	2026-05-29 16:59
unumberrangeformatter.h	15.35 KB	-rw-r--r--	2026-05-29 16:59
unumsys.h	7.26 KB	-rw-r--r--	2026-05-29 16:59
uobject.h	10.6 KB	-rw-r--r--	2026-05-29 16:59
upluralrules.h	8.79 KB	-rw-r--r--	2026-05-29 16:59
uregex.h	71.99 KB	-rw-r--r--	2026-05-29 16:59
uregion.h	9.81 KB	-rw-r--r--	2026-05-29 16:59
ureldatefmt.h	16.98 KB	-rw-r--r--	2026-05-29 16:59
urename.h	142.22 KB	-rw-r--r--	2026-05-29 16:59
urep.h	5.38 KB	-rw-r--r--	2026-05-29 16:59
ures.h	36.65 KB	-rw-r--r--	2026-05-29 16:59
uscript.h	28.95 KB	-rw-r--r--	2026-05-29 16:59
usearch.h	39.21 KB	-rw-r--r--	2026-05-29 16:59
uset.h	63.03 KB	-rw-r--r--	2026-05-29 16:59
usetiter.h	9.63 KB	-rw-r--r--	2026-05-29 16:59
ushape.h	18 KB	-rw-r--r--	2026-05-29 16:59
usimplenumberformatter.h	7.31 KB	-rw-r--r--	2026-05-29 16:59
uspoof.h	80 KB	-rw-r--r--	2026-05-29 16:59
usprep.h	8.19 KB	-rw-r--r--	2026-05-29 16:59
ustdio.h	38.58 KB	-rw-r--r--	2026-05-29 16:59
ustream.h	1.89 KB	-rw-r--r--	2026-05-29 16:59
ustring.h	72.16 KB	-rw-r--r--	2026-05-29 16:59
ustringtrie.h	3.15 KB	-rw-r--r--	2026-05-29 16:59
utext.h	58.1 KB	-rw-r--r--	2026-05-29 16:59
utf.h	8.65 KB	-rw-r--r--	2026-05-29 16:59
utf16.h	23.35 KB	-rw-r--r--	2026-05-29 16:59
utf32.h	763 B	-rw-r--r--	2026-05-29 16:59
utf8.h	31.65 KB	-rw-r--r--	2026-05-29 16:59
utf_old.h	45.85 KB	-rw-r--r--	2026-05-29 16:59
utfiterator.h	95.02 KB	-rw-r--r--	2026-05-29 16:59
utfstring.h	4.89 KB	-rw-r--r--	2026-05-29 16:59
utmscale.h	13.78 KB	-rw-r--r--	2026-05-29 16:59
utrace.h	17.18 KB	-rw-r--r--	2026-05-29 16:59
utrans.h	25.54 KB	-rw-r--r--	2026-05-29 16:59
utypes.h	36.73 KB	-rw-r--r--	2026-05-29 16:59
uvernum.h	6.33 KB	-rw-r--r--	2026-05-29 16:59
uversion.h	8.21 KB	-rw-r--r--	2026-05-29 16:59
vtzone.h	20.68 KB	-rw-r--r--	2026-05-29 16:59

Rename

// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

// char16ptr.h
// created: 2017feb28 Markus W. Scherer

#ifndef __CHAR16PTR_H__
#define __CHAR16PTR_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API || U_SHOW_CPLUSPLUS_HEADER_API

#include <cstddef>
#include <string_view>
#include <type_traits>

#endif

/**
 * \file
 * \brief C++ API: char16_t pointer wrappers with
 *        implicit conversion from bit-compatible raw pointer types.
 *        Also conversion functions from char16_t * to UChar * and OldUChar *.
 */

/**
 * \def U_ALIASING_BARRIER
 * Barrier for pointer anti-aliasing optimizations even across function boundaries.
 * @internal
 */
#ifdef U_ALIASING_BARRIER
    // Use the predefined value.
#elif (defined(__clang__) || defined(__GNUC__)) && U_PLATFORM != U_PF_BROWSER_NATIVE_CLIENT
#   define U_ALIASING_BARRIER(ptr) asm volatile("" : : "rm"(ptr) : "memory")
#elif defined(U_IN_DOXYGEN)
#   define U_ALIASING_BARRIER(ptr)
#endif

// ICU DLL-exported
#if U_SHOW_CPLUSPLUS_API

U_NAMESPACE_BEGIN

/**
 * char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
 * @stable ICU 59
 */
class U_COMMON_API Char16Ptr final {
public:
    /**
     * Copies the pointer.
     * @param p pointer
     * @stable ICU 59
     */
    inline Char16Ptr(char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
    /**
     * Converts the pointer to char16_t *.
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline Char16Ptr(uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
    /**
     * Converts the pointer to char16_t *.
     * (Only defined if U_SIZEOF_WCHAR_T==2.)
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline Char16Ptr(wchar_t *p);
#endif
    /**
     * nullptr constructor.
     * @param p nullptr
     * @stable ICU 59
     */
    inline Char16Ptr(std::nullptr_t p);
    /**
     * Destructor.
     * @stable ICU 59
     */
    inline ~Char16Ptr();

/**
     * Pointer access.
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline char16_t *get() const;
    /**
     * char16_t pointer access via type conversion (e.g., static_cast).
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline operator char16_t *() const { return get(); }

private:
    Char16Ptr() = delete;

#ifdef U_ALIASING_BARRIER
    template<typename T> static char16_t *cast(T *t) {
        U_ALIASING_BARRIER(t);
        return reinterpret_cast<char16_t *>(t);
    }

char16_t *p_;
#else
    union {
        char16_t *cp;
        uint16_t *up;
        wchar_t *wp;
    } u_;
#endif
};

/// \cond
#ifdef U_ALIASING_BARRIER

Char16Ptr::Char16Ptr(char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) : p_(cast(p)) {}
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) : p_(p) {}
Char16Ptr::~Char16Ptr() {
    U_ALIASING_BARRIER(p_);
}

char16_t *Char16Ptr::get() const { return p_; }

#else

Char16Ptr::Char16Ptr(char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) { u_.wp = p; }
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) { u_.cp = p; }
Char16Ptr::~Char16Ptr() {}

char16_t *Char16Ptr::get() const { return u_.cp; }

#endif
/// \endcond

/**
 * const char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
 * @stable ICU 59
 */
class U_COMMON_API ConstChar16Ptr final {
public:
    /**
     * Copies the pointer.
     * @param p pointer
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
    /**
     * Converts the pointer to char16_t *.
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
    /**
     * Converts the pointer to char16_t *.
     * (Only defined if U_SIZEOF_WCHAR_T==2.)
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const wchar_t *p);
#endif
    /**
     * nullptr constructor.
     * @param p nullptr
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const std::nullptr_t p);

/**
     * Destructor.
     * @stable ICU 59
     */
    inline ~ConstChar16Ptr();

/**
     * Pointer access.
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline const char16_t *get() const;
    /**
     * char16_t pointer access via type conversion (e.g., static_cast).
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline operator const char16_t *() const { return get(); }

private:
    ConstChar16Ptr() = delete;

#ifdef U_ALIASING_BARRIER
    template<typename T> static const char16_t *cast(const T *t) {
        U_ALIASING_BARRIER(t);
        return reinterpret_cast<const char16_t *>(t);
    }

const char16_t *p_;
#else
    union {
        const char16_t *cp;
        const uint16_t *up;
        const wchar_t *wp;
    } u_;
#endif
};

/// \cond
#ifdef U_ALIASING_BARRIER

ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) : p_(cast(p)) {}
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) : p_(p) {}
ConstChar16Ptr::~ConstChar16Ptr() {
    U_ALIASING_BARRIER(p_);
}

const char16_t *ConstChar16Ptr::get() const { return p_; }

#else

ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) { u_.wp = p; }
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) { u_.cp = p; }
ConstChar16Ptr::~ConstChar16Ptr() {}

const char16_t *ConstChar16Ptr::get() const { return u_.cp; }

#endif
/// \endcond

U_NAMESPACE_END

#endif  // U_SHOW_CPLUSPLUS_API

// Usable in header-only definitions
#if U_SHOW_CPLUSPLUS_API || U_SHOW_CPLUSPLUS_HEADER_API

namespace U_ICU_NAMESPACE_OR_INTERNAL {

#ifndef U_FORCE_HIDE_INTERNAL_API
/** @internal */
template<typename T, typename = std::enable_if_t<std::is_same_v<T, UChar>>>
inline const char16_t *uprv_char16PtrFromUChar(const T *p) {
    if constexpr (std::is_same_v<UChar, char16_t>) {
        return p;
    } else {
#if U_SHOW_CPLUSPLUS_API
        return ConstChar16Ptr(p).get();
#else
#ifdef U_ALIASING_BARRIER
        U_ALIASING_BARRIER(p);
#endif
        return reinterpret_cast<const char16_t *>(p);
#endif
    }
}
#if !U_CHAR16_IS_TYPEDEF && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 180000)
/** @internal */
inline const char16_t *uprv_char16PtrFromUint16(const uint16_t *p) {
#if U_SHOW_CPLUSPLUS_API
    return ConstChar16Ptr(p).get();
#else
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const char16_t *>(p);
#endif
}
#endif
#if U_SIZEOF_WCHAR_T==2
/** @internal */
inline const char16_t *uprv_char16PtrFromWchar(const wchar_t *p) {
#if U_SHOW_CPLUSPLUS_API
    return ConstChar16Ptr(p).get();
#else
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const char16_t *>(p);
#endif
}
#endif
#endif

/**
 * Converts from const char16_t * to const UChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as const UChar *
 * @stable ICU 59
 */
inline const UChar *toUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const UChar *>(p);
}

/**
 * Converts from char16_t * to UChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as UChar *
 * @stable ICU 59
 */
inline UChar *toUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<UChar *>(p);
}

/**
 * Converts from const char16_t * to const OldUChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as const OldUChar *
 * @stable ICU 59
 */
inline const OldUChar *toOldUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const OldUChar *>(p);
}

/**
 * Converts from char16_t * to OldUChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as OldUChar *
 * @stable ICU 59
 */
inline OldUChar *toOldUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<OldUChar *>(p);
}

}  // U_ICU_NAMESPACE_OR_INTERNAL

#endif  // U_SHOW_CPLUSPLUS_API || U_SHOW_CPLUSPLUS_HEADER_API

// ICU DLL-exported
#if U_SHOW_CPLUSPLUS_API

U_NAMESPACE_BEGIN

#ifndef U_FORCE_HIDE_INTERNAL_API
/**
 * Is T convertible to a std::u16string_view or some other 16-bit string view?
 * @internal
 */
template<typename T>
constexpr bool ConvertibleToU16StringView =
    std::is_convertible_v<T, std::u16string_view>
#if !U_CHAR16_IS_TYPEDEF && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 180000)
    || std::is_convertible_v<T, std::basic_string_view<uint16_t>>
#endif
#if U_SIZEOF_WCHAR_T==2
    || std::is_convertible_v<T, std::wstring_view>
#endif
    ;

namespace internal {
/**
 * Pass-through overload.
 * @internal
 */
inline std::u16string_view toU16StringView(std::u16string_view sv) { return sv; }

#if !U_CHAR16_IS_TYPEDEF && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 180000)
/**
 * Basically undefined behavior but sometimes necessary conversion
 * from std::basic_string_view<uint16_t> to std::u16string_view.
 * @internal
 */
inline std::u16string_view toU16StringView(std::basic_string_view<uint16_t> sv) {
    return { ConstChar16Ptr(sv.data()), sv.length() };
}
#endif

#if U_SIZEOF_WCHAR_T==2
/**
 * Basically undefined behavior but sometimes necessary conversion
 * from std::wstring_view to std::u16string_view.
 * @internal
 */
inline std::u16string_view toU16StringView(std::wstring_view sv) {
    return { ConstChar16Ptr(sv.data()), sv.length() };
}
#endif

/**
 * Pass-through overload.
 * @internal
 */
template <typename T,
          typename = typename std::enable_if_t<!std::is_pointer_v<std::remove_reference_t<T>>>>
inline std::u16string_view toU16StringViewNullable(const T& text) {
    return toU16StringView(text);
}

/**
 * In case of nullptr, return an empty view.
 * @internal
 */
template <typename T,
          typename = typename std::enable_if_t<std::is_pointer_v<std::remove_reference_t<T>>>,
          typename = void>
inline std::u16string_view toU16StringViewNullable(const T& text) {
    if (text == nullptr) return {};  // For backward compatibility.
    return toU16StringView(text);
}

}  // internal
#endif  // U_FORCE_HIDE_INTERNAL_API

U_NAMESPACE_END

#endif  // U_SHOW_CPLUSPLUS_API

#endif  // __CHAR16PTR_H__