The QScriptContextInfo class provides additional information about a QScriptContext . 更多...
| 头： | #include <QScriptContextInfo> |
| qmake: | QT += script |
| Since: | Qt 4.4 |
该类在 Qt 4.4 引入。
| enum | FunctionType { ScriptFunction, QtFunction, QtPropertyFunction, NativeFunction } |
| QScriptContextInfo () | |
| QScriptContextInfo (const QScriptContextInfo & other ) | |
| QScriptContextInfo (const QScriptContext * context ) | |
| QScriptContextInfo & | operator= (const QScriptContextInfo & other ) |
| ~QScriptContextInfo () | |
| QString | fileName () const |
| int | functionEndLineNumber () const |
| int | functionMetaIndex () const |
| QString | functionName () const |
| QStringList | functionParameterNames () const |
| int | functionStartLineNumber () const |
| QScriptContextInfo::FunctionType | functionType () const |
| bool | isNull () const |
| int | lineNumber () const |
| qint64 | scriptId () const |
| bool | operator!= (const QScriptContextInfo & other ) const |
| bool | operator== (const QScriptContextInfo & other ) const |
| QDataStream & | operator<< (QDataStream & stream , const QScriptContextInfo & info ) |
| QDataStream & | operator>> (QDataStream & stream , QScriptContextInfo & info ) |
QScriptContextInfo is typically used for debugging purposes. It can provide information about the code being executed, such as the type of the called function, and the original source code location of the current statement.
If the called function is executing Qt Script code, you can obtain the script location with the functions fileName () 和 lineNumber ().
You can obtain the starting line number and ending line number of a Qt Script function definition with functionStartLineNumber () 和 functionEndLineNumber () 分别。
For Qt Script functions and Qt methods (e.g. slots), you can call functionParameterNames () to get the names of the formal parameters of the function.
For Qt methods and Qt property accessors, you can obtain the index of the underlying QMetaMethod or QMetaProperty 通过调用 functionMetaIndex ().
另请参阅 QScriptContext and QScriptEngineAgent .
This enum specifies the type of function being called.
| 常量 | 值 | 描述 |
|---|---|---|
QScriptContextInfo::ScriptFunction
|
0
|
The function is a Qt Script function, i.e. it was defined through a call to QScriptEngine::evaluate (). |
QScriptContextInfo::QtFunction
|
1
|
The function is a Qt function (a signal, slot or method). |
QScriptContextInfo::QtPropertyFunction
|
2
|
The function is a Qt property getter or setter. |
QScriptContextInfo::NativeFunction
|
3
|
The function is a built-in Qt Script function, or it was defined through a call to QScriptEngine::newFunction (). |
Constructs a null QScriptContextInfo.
另请参阅 isNull ().
Constructs a new QScriptContextInfo from the other info.
Constructs a new QScriptContextInfo from the given context .
The relevant information is extracted from the context at construction time; i.e. if you continue script execution in the context , the new state of the context will not be reflected in a previously created QScriptContextInfo.
赋值 other info to this QScriptContextInfo , and returns a reference to this QScriptContextInfo .
销毁 QScriptContextInfo .
Returns the name of the file where the code being executed was defined, if available; otherwise returns an empty string.
For Qt Script code, this function returns the fileName argument that was passed to QScriptEngine::evaluate ().
另请参阅 lineNumber () 和 functionName ().
Returns the line number where the definition of the called function ends, or -1 if the line number is not available.
The ending line number is only available if the functionType () 是 ScriptFunction .
另请参阅 functionStartLineNumber ().
Returns the meta index of the called function, or -1 if the meta index is not available.
The meta index is only available if the functionType () 是 QtFunction or QtPropertyFunction 。对于 QtFunction , the meta index can be passed to QMetaObject::method () to obtain the corresponding method definition; for QtPropertyFunction , the meta index can be passed to QMetaObject::property () to obtain the corresponding property definition.
另请参阅 QScriptContext::thisObject ().
Returns the name of the called function, or an empty string if the name is not available.
For script functions of type QtPropertyFunction , this function always returns the name of the property; you can use QScriptContext::argumentCount () to differentiate between reads and writes.
另请参阅 fileName () 和 functionType ().
Returns the names of the formal parameters of the called function, or an empty QStringList if the parameter names are not available.
另请参阅 QScriptContext::argument ().
Returns the line number where the definition of the called function starts, or -1 if the line number is not available.
The starting line number is only available if the functionType () 是 ScriptFunction .
另请参阅 functionEndLineNumber () 和 fileName ().
Returns the type of the called function.
另请参阅 functionName () 和 QScriptContext::callee ().
返回 true，若此 QScriptContextInfo is null, i.e. does not contain any information.
Returns the line number corresponding to the statement being executed, or -1 if the line number is not available.
The line number is only available if Qt Script code is being executed.
另请参阅 columnNumber () 和 fileName ().
Returns the ID of the script where the code being executed was defined, or -1 if the ID is not available (i.e. a native function is being executed).
另请参阅 QScriptEngineAgent::scriptLoad ().
返回 true，若此 QScriptContextInfo is not equal to the other info, otherwise returns false.
返回 true，若此 QScriptContextInfo is equal to the other info, otherwise returns false.
写入给定 info 到指定 stream .
该函数在 Qt 4.4 引入。
读取 QScriptContextInfo 从指定 stream 进给定 info .
该函数在 Qt 4.4 引入。
