---
name: "qconststring"
section: "3qt"
platform: "linux"
package: "qt3-doc"
version: "3:3.3.8b-7"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/qconststring"
---

# qconststring(3qt)

String objects using constant Unicode data

## NAME

QConstString - String objects using constant Unicode data

## SYNOPSIS

All the functions in this class are reentrant when Qt is built with thread support.\</p\>

`#include <qstring.h>`

### Public Members

**QConstString ( const QChar \* unicode, uint length )**\
 **~QConstString ()**\
 **const QString & string () const**\

## DESCRIPTION

The QConstString class provides string objects using constant Unicode data.

In order to minimize copying, highly optimized applications can use QConstString to provide a QString-compatible object from existing Unicode data. It is then the programmer's responsibility to ensure that the Unicode data exists for the entire lifetime of the QConstString object.

A QConstString is created with the QConstString constructor. The string held by the object can be obtained by calling string().

See also Text Related Classes.

## MEMBER FUNCTION DOCUMENTATION

## QConstString::QConstString ( const QChar \* unicode, uint length )

Constructs a QConstString that uses the first *length* Unicode characters in the array *unicode*. Any attempt to modify copies of the string will cause it to create a copy of the data, thus it remains forever unmodified.

The data in *unicode* is not copied. The caller must be able to guarantee that *unicode* will not be deleted or modified.

## QConstString::~QConstString ()

Destroys the QConstString, creating a copy of the data if other strings are still using it.

## const QString & QConstString::string () const

Returns a constant string referencing the data passed during construction.

## SEE ALSO

**http://doc.trolltech.com/qconststring.html** **http://www.trolltech.com/faq/tech.html**

## COPYRIGHT

Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file included in the distribution for a complete license statement.

## AUTHOR

Generated automatically from the source code.

## BUGS

If you find a bug in Qt, please report it as described in **http://doc.trolltech.com/bughowto.html**. Good bug reports help us to help you. Thank you.

The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech.

If you find errors in this manual page, please report them to **qt-bugs@trolltech.com**. Please include the name of the manual page (qconststring.3qt) and the Qt version (3.3.8).