QScriptString Class | Qt Script

- Qt 5.5
- Qt Script
- C++ Classes
- QScriptString
- Qt 5.5.1 Reference Documentation

# QScriptString Class

The QScriptString class acts as a handle to "interned" strings in a QScriptEngine. More...

Header: | #include <QScriptString>
qmake: | QT += script
Since: | Qt 4.4

- List of all members, including inherited members

## Public Functions

| QScriptString()
| QScriptString(const QScriptString & other)
| ~QScriptString()
bool | isValid() const
quint32 | toArrayIndex(bool * ok = 0) const
QString | toString() const
| operator QString() const
bool | operator!=(const QScriptString & other) const
QScriptString & | operator=(const QScriptString & other)
bool | operator==(const QScriptString & other) const

## Detailed Description

The QScriptString class acts as a handle to "interned" strings in a QScriptEngine.

QScriptString can be used to achieve faster (repeated) property getting/setting, and comparison of property names, of script objects.

To get a QScriptString representation of a string, pass the string to QScriptEngine::toStringHandle(). The typical usage pattern is to register one or more pre-defined strings when setting up your script environment, then subsequently use the relevant QScriptString as argument to e.g. QScriptValue::property().

Call the toString() function to obtain the string that a QScriptString represents.

Call the toArrayIndex() function to convert a QScriptString to an array index. This is useful when using QScriptClass to implement array-like objects.

## Member Function Documentation

### QScriptString::QScriptString()

Constructs an invalid QScriptString.

### QScriptString::QScriptString(const QScriptString & other)

Constructs a new QScriptString that is a copy of other.

### QScriptString::~QScriptString()

Destroys this QScriptString.

### bool QScriptString::isValid() const

Returns true if this QScriptString is valid; otherwise returns false.

### quint32 QScriptString::toArrayIndex(bool * ok = 0) const

Attempts to convert this QScriptString to a Qt Script array index, and returns the result.

If a conversion error occurs, *ok is set to false; otherwise *ok is set to true.

This function was introduced in Qt 4.6.

### QString QScriptString::toString() const

Returns the string that this QScriptString represents, or a null string if this QScriptString is not valid.

See also isValid().

### QScriptString::operator QString() const

Returns the string that this QScriptString represents, or a null string if this QScriptString is not valid.

See also toString().

### bool QScriptString::operator!=(const QScriptString & other) const

Returns true if this QScriptString is not equal to other; otherwise returns false.

### QScriptString & QScriptString::operator=(const QScriptString & other)

Assigns the other value to this QScriptString.

### bool QScriptString::operator==(const QScriptString & other) const

Returns true if this QScriptString is equal to other; otherwise returns false.