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C++ API: "Smart pointers" for use with and in ICU4C C++ code.More...

#include "unicode/utypes.h"
#include <memory>

Data Structures
class	icu::LocalPointerBase< T >
	"Smart pointer" base class; do not use directly: useLocalPointer etc.More...

class	icu::LocalPointer< T >
	"Smart pointer" class, deletes objects via the standard C++ delete operator.More...

class	icu::LocalArray< T >
	"Smart pointer" class, deletes objects via the C++ array delete[] operator.More...

Namespaces
	icu
	Filecoll.h.

Macros
#define	U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction) using LocalPointerClassName = internal::LocalOpenPointer<Type, closeFunction>
	"Smart pointer" definition macro, deletes objects via the closeFunction.More...

Detailed Description

C++ API: "Smart pointers" for use with and in ICU4C C++ code.

These classes are inspired by

std::auto_ptr
boost::scoped_ptr & boost::scoped_array
Taligent Safe Pointers (TOnlyPointerTo)

but none of those provide for all of the goals for ICU smart pointers:

Smart pointer owns the object and releases it when it goes out of scope.
No transfer of ownership via copy/assignment to reduce misuse. Simpler & more robust.
ICU-compatible: No exceptions.
Need to be able to orphan/release the pointer and its ownership.
Need variants for normal C++ object pointers, C++ arrays, and ICU C service objects.

For details seehttps://icu.unicode.org/design/cpp/scoped_ptr

Definition in filelocalpointer.h.

Macro Definition Documentation

◆ U_DEFINE_LOCAL_OPEN_POINTER

#define U_DEFINE_LOCAL_OPEN_POINTER	(	LocalPointerClassName,
		Type,
		closeFunction
	)	using LocalPointerClassName = internal::LocalOpenPointer<Type, closeFunction>

"Smart pointer" definition macro, deletes objects via the closeFunction.

Defines a subclass of LocalPointerBase which works just like LocalPointer<Type> except that this subclass will use the closeFunction rather than the C++ delete operator.

Usage example:

LocalUCaseMapPointer csm(ucasemap_open(localeID, options, &errorCode));

utf8OutLength=ucasemap_utf8ToLower(csm.getAlias(),

utf8Out, (int32_t)sizeof(utf8Out),

utf8In, utf8InLength, &errorCode);

if(U_FAILURE(errorCode)) {return; }// no need to explicitly delete the UCaseMap

LocalUCaseMapPointer

"Smart pointer" class, closes a UCaseMap via ucasemap_close().

ucasemap_utf8ToLower

U_CAPI int32_t ucasemap_utf8ToLower(const UCaseMap *csm, char *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode)

Lowercase the characters in a UTF-8 string.

ucasemap_open

U_CAPI UCaseMap * ucasemap_open(const char *locale, uint32_t options, UErrorCode *pErrorCode)

Open a UCaseMap service object for a locale and a set of options.

U_FAILURE

#define U_FAILURE(x)

Does the error code indicate a failure?

Definition:utypes.h:827

See also: LocalPointerBase; LocalPointer

Stable:: ICU 4.4

Definition at line548 of filelocalpointer.h.

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Data Structures

Namespaces

Macros

Detailed Description

Macro Definition Documentation

◆ U_DEFINE_LOCAL_OPEN_POINTER