QJSPrimitiveValue#
The QJSPrimitiveValue class operates on primitive types in JavaScript semantics. More…
Synopsis#
Functions#
def
constData()def
data()def
equals(other)def
metaType()def
__ne__(rhs)def
__mod__(rhs)def
__mul__(rhs)def
__add__()def
__add__(rhs)def
__iadd__()def
__iadd__(arg__1)def
__sub__()def
__sub__(rhs)def
__isub__(arg__1)def
__isub__()def
__div__(rhs)def
__lt__(rhs)def
__le__(rhs)def
__eq__(rhs)def
__gt__(rhs)def
__ge__(rhs)def
strictlyEquals(other)def
toBoolean()def
toDouble()def
toInteger()def
toString()def
toVariant()def
type()
Note
This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE
Detailed Description#
QJSPrimitiveValue supports most of the primitive types defined in the ECMA-262 standard, in particular Undefined, Boolean, Number, and String. Additionally, you can store a JavaScript null in a QJSPrimitiveValue and as a special case of Number, you can store an integer value.
All those values are stored immediately, without interacting with the JavaScript heap. Therefore, you can pass QJSPrimitiveValues between different JavaScript engines. In contrast to QJSManagedValue , there is also no danger in destroying a QJSPrimitiveValue from a different thread than it was created in. On the flip side, QJSPrimitiveValue does not hold a reference to any JavaScript engine.
QJSPrimitiveValue implements the JavaScript arithmetic and comparison operators on the supported types in JavaScript semantics. Types are coerced like the JavaScript engine would coerce them if the operators were written in a JavaScript expression.
The JavaScript Symbol type is not supported as it is of very limited utility regarding arithmetic and comparison operators, the main purpose of QJSPrimitiveValue . In particular, it causes an exception whenever you try to coerce it to a number or a string, and we cannot throw exceptions without a JavaScript Engine.
- class PySide6.QtQml.QJSPrimitiveValue#
PySide6.QtQml.QJSPrimitiveValue(type)
PySide6.QtQml.QJSPrimitiveValue(string)
PySide6.QtQml.QJSPrimitiveValue(value)
PySide6.QtQml.QJSPrimitiveValue(type, value)
PySide6.QtQml.QJSPrimitiveValue(variant)
PySide6.QtQml.QJSPrimitiveValue(value)
PySide6.QtQml.QJSPrimitiveValue(value)
- Parameters:
string – str
variant – object
type –
PySide6.QtCore.QMetaTypevalue – bool
Creates a QJSPrimitiveValue of type Undefined.
Creates a QJSPrimitiveValue of value value and type String.
Creates a QJSPrimitiveValue of value value and type Boolean.
Creates a QJSPrimitiveValue of type type, and initializes with value if type can be stored in QJSPrimtiveValue. value must not be nullptr in that case. If type cannot be stored this results in a QJSPrimitiveValue of type Undefined.
Note that you have to pass the address of the variable you want stored.
Usually, you never have to use this constructor, use the one taking QVariant instead.
Creates a QJSPrimitiveValue from the contents of value if those contents can be stored in QJSPrimtiveValue. Otherwise this results in a QJSPrimitiveValue of type Undefined.
Creates a QJSPrimitiveValue of value value and type Double.
Creates a QJSPrimitiveValue of value value and type Integer.
- PySide6.QtQml.QJSPrimitiveValue.Type#
This enum speicifies the types a QJSPrimitiveValue might contain.
Constant
Description
QJSPrimitiveValue.Undefined
The JavaScript Undefined value.
QJSPrimitiveValue.Null
The JavaScript null value. This is in fact not a separate JavaScript type but a special value of the Object type. As it is very common and storable without JavaScript engine, it is still supported.
QJSPrimitiveValue.Boolean
A JavaScript Boolean value.
QJSPrimitiveValue.Integer
An integer. This is a special case of the JavaScript Number type. JavaScript does not have an actual integer type, but the ECMA-262 standard contains rules on how to transform a Number in order to prepare it for certain operators that only make sense on integers, in particular the bit shift operators.
QJSPrimitiveValue‘s Integer type represents the result of such a transformation.QJSPrimitiveValue.Double
A JavaScript Number value.
QJSPrimitiveValue.String
A JavaScript String value.
- PySide6.QtQml.QJSPrimitiveValue.constData()#
- Return type:
void
- PySide6.QtQml.QJSPrimitiveValue.data()#
- Return type:
void
- PySide6.QtQml.QJSPrimitiveValue.equals(other)#
- Parameters:
other –
PySide6.QtQml.QJSPrimitiveValue- Return type:
bool
Performs the JavaScript ‘==’ operation on this QJSPrimitiveValue and other, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.metaType()#
- Return type:
Returns the QMetaType of the value stored in the QJSPrimitiveValue .
- PySide6.QtQml.QJSPrimitiveValue.__ne__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘!==’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__mod__(rhs)#
- Parameters:
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__mul__(rhs)#
- Parameters:
- Return type:
Performs the JavaScript ‘*’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__add__()#
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__add__(rhs)
- Parameters:
- Return type:
Perfoms the JavaScript ‘+’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__iadd__()#
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__iadd__(arg__1)
- Parameters:
arg__1 – int
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__sub__()#
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__sub__(rhs)
- Parameters:
- Return type:
Performs the JavaScript ‘-’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__isub__(arg__1)#
- Parameters:
arg__1 – int
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__isub__()
- Return type:
- PySide6.QtQml.QJSPrimitiveValue.__div__(rhs)#
- Parameters:
- Return type:
Performs the JavaScript ‘/’ operation between lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__lt__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘<’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__le__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘<=’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__eq__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘===’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__gt__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘>’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.__ge__(rhs)#
- Parameters:
- Return type:
bool
Performs the JavaScript ‘>=’ operation on lhs and rhs, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.strictlyEquals(other)#
- Parameters:
other –
PySide6.QtQml.QJSPrimitiveValue- Return type:
bool
Performs the JavaScript ‘===’ operation on this QJSPrimitiveValue and other, and returns the result.
- PySide6.QtQml.QJSPrimitiveValue.toBoolean()#
- Return type:
bool
Returns the value coerced a boolean by JavaScript rules.
- PySide6.QtQml.QJSPrimitiveValue.toDouble()#
- Return type:
float
Returns the value coerced to a JavaScript Number by JavaScript rules.
- PySide6.QtQml.QJSPrimitiveValue.toInteger()#
- Return type:
int
Returns the value coerced to an integral 32bit number by the rules JavaScript would apply when preparing it for a bit shift operation.
- PySide6.QtQml.QJSPrimitiveValue.toString()#
- Return type:
str
Returns the value coerced to a JavaScript String by JavaScript rules.
- PySide6.QtQml.QJSPrimitiveValue.toVariant()#
- Return type:
object
Returns the type of the QJSPrimitiveValue .