QCborArray 類

The QCborArray class is used to hold an array of CBOR elements. 更多...

頭: #include <QCborArray>
qmake: QT += core
Since: Qt 5.12

注意: 此類的所有函數 可重入 .

公共類型

class ConstIterator
class Iterator
typedef const_iterator
typedef const_pointer
typedef const_reference
typedef difference_type
typedef iterator
typedef pointer
typedef reference
typedef size_type
typedef value_type

公共函數

QCborArray ()
QCborArray (const QCborArray & other )
QCborArray (std::initializer_list<QCborValue> args )
~QCborArray ()
void append (const QCborValue & value )
void append (QCborValue && value )
QCborValue at (qsizetype i ) const
QCborArray::iterator begin ()
QCborArray::const_iterator begin () const
QCborArray::const_iterator cbegin () const
QCborArray::const_iterator cend () const
void clear ()
int compare (const QCborArray & other ) const
QCborArray::const_iterator constBegin () const
QCborArray::const_iterator constEnd () const
bool contains (const QCborValue & value ) const
bool empty () const
QCborArray::iterator end ()
QCborArray::const_iterator end () const
QCborArray::iterator erase (QCborArray::iterator it )
QCborArray::iterator erase (QCborArray::const_iterator it )
QCborValue extract (QCborArray::ConstIterator it )
QCborValue extract (QCborArray::Iterator it )
QCborValue first () const
QCborValueRef first ()
void insert (qsizetype i , const QCborValue & value )
void insert (qsizetype i , QCborValue && value )
QCborArray::iterator insert (QCborArray::iterator before , const QCborValue & value )
QCborArray::iterator insert (QCborArray::const_iterator before , const QCborValue & value )
bool isEmpty () const
QCborValue last () const
QCborValueRef last ()
void pop_back ()
void pop_front ()
void prepend (const QCborValue & value )
void prepend (QCborValue && value )
void push_back (const QCborValue & t )
void push_front (const QCborValue & t )
void removeAt (qsizetype i )
void removeFirst ()
void removeLast ()
qsizetype size () const
void swap (QCborArray & other )
QCborValue takeAt (qsizetype i )
QCborValue takeFirst ()
QCborValue takeLast ()
QCborValue toCborValue () const
QJsonArray toJsonArray () const
QVariantList toVariantList () const
bool operator!= (const QCborArray & other ) const
QCborArray operator+ (const QCborValue & v ) const
QCborArray & operator+= (const QCborValue & v )
bool operator< (const QCborArray & other ) const
QCborArray & operator<< (const QCborValue & v )
QCborArray & operator= (const QCborArray & other )
bool operator== (const QCborArray & other ) const
const QCborValue operator[] (qsizetype i ) const
QCborValueRef operator[] (qsizetype i )

靜態公共成員

QCborArray fromJsonArray (const QJsonArray & array )
QCborArray fromStringList (const QStringList & list )
QCborArray fromVariantList (const QVariantList & list )

詳細描述

The QCborArray class is used to hold an array of CBOR elements.

This class can be used to hold one sequential container in CBOR (an array). CBOR is the Concise Binary Object Representation, a very compact form of binary data encoding that is a superset of JSON. It was created by the IETF Constrained RESTful Environments (CoRE) WG, which has used it in many new RFCs. It is meant to be used alongside the CoAP protocol .

QCborArray 非常類似 QVariantList and QJsonArray and its API is almost identical to those two classes. It can also be converted to and from those two, though there may be loss of information in some conversions.

另請參閱 QCborValue , QCborMap , QJsonArray , QList ,和 QVector .

成員類型文檔編製

typedef QCborArray:: const_iterator

同義詞 QCborArray::ConstIterator .

typedef QCborArray:: const_pointer

A typedef to const QCborValue * , for compatibility with generic algorithms.

typedef QCborArray:: const_reference

A typedef to const QCborValue & , for compatibility with generic algorithms.

typedef QCborArray:: difference_type

A typedef to qsizetype.

typedef QCborArray:: iterator

同義詞 QCborArray::Iterator .

typedef QCborArray:: pointer

A typedef to QCborValue * , for compatibility with generic algorithms.

typedef QCborArray:: reference

A typedef to QCborValue & , for compatibility with generic algorithms.

typedef QCborArray:: size_type

A typedef to qsizetype.

typedef QCborArray:: value_type

The type of values that can be held in a QCborArray : that is, QCborValue .

成員函數文檔編製

QCborArray::iterator QCborArray:: erase ( QCborArray::iterator it )

QCborArray::iterator QCborArray:: erase ( QCborArray::const_iterator it )

Removes the element pointed to by the array iterator it from this array, then returns an iterator to the next element (the one that took the same position in the array that it used to occupy).

另請參閱 insert (), removeAt (), takeAt (), takeFirst (),和 takeLast ().

QCborArray::iterator QCborArray:: insert ( QCborArray::iterator before , const QCborValue & value )

QCborArray::iterator QCborArray:: insert ( QCborArray::const_iterator before , const QCborValue & value )

這是重載函數。

插入 value into this array before element before and returns an array iterator pointing to the just-inserted element.

另請參閱 erase (), removeAt (), prepend (),和 append ().

void QCborArray:: append (const QCborValue & value )

void QCborArray:: append ( QCborValue && value )

追加 value into the array after all other elements it may already contain.

另請參閱 at (), operator[] (), first (), last (), insert (), prepend (), removeAt (),和 takeAt ().

void QCborArray:: prepend (const QCborValue & value )

void QCborArray:: prepend ( QCborValue && value )

前置 value into the array before any other elements it may already contain.

另請參閱 at (), operator[] (), first (), last (), insert (), append (), removeAt (),和 takeAt ().

QCborValue QCborArray:: extract ( QCborArray::Iterator it )

QCborValue QCborArray:: extract ( QCborArray::ConstIterator it )

Extracts a value from the array at the position indicated by iterator it and returns the value so extracted.

另請參閱 insert (), erase (), takeAt (),和 removeAt ().

void QCborArray:: insert ( qsizetype i , const QCborValue & value )

void QCborArray:: insert ( qsizetype i , QCborValue && value )

插入 value into the array at position i in this array. If i is -1, the entry is appended to the array. Pads the array with invalid entries if i is greater than the prior size of the array.

另請參閱 at (), operator[] (), first (), last (), prepend (), append (), removeAt (), takeAt (),和 extract ().

QCborArray:: QCborArray ()

構造空的 QCborArray .

QCborArray:: QCborArray (const QCborArray & other )

Copies the contents of other 到此對象。

QCborArray:: QCborArray ( std::initializer_list < QCborValue > args )

Initializes this QCborArray from the C++ brace-enclosed list found in args , as in the following example:

QCborArray a = { null, 0, 1, 1.5, 2, "Hello", QByteArray("World") };
					

QCborArray:: ~QCborArray ()

銷毀此 QCborArray 並釋放任何關聯資源。

QCborValue QCborArray:: at ( qsizetype i ) const

返迴 QCborValue element at position i in the array.

若數組 < i elements, this function returns a QCborValue containing an undefined value. For that reason, it is not possible with this function to tell apart the situation where the array is not large enough from the case where the array starts with an undefined value.

另請參閱 operator[] (), first (), last (), insert (), prepend (), append (), removeAt (),和 takeAt ().

QCborArray::iterator QCborArray:: begin ()

Returns an array iterator pointing to the first item in this array. If the array is empty, then this function returns the same as end ().

另請參閱 constBegin () 和 end ().

QCborArray::const_iterator QCborArray:: begin () const

Returns an array iterator pointing to the first item in this array. If the array is empty, then this function returns the same as end ().

另請參閱 constBegin () 和 constEnd ().

QCborArray::const_iterator QCborArray:: cbegin () const

Returns an array iterator pointing to the first item in this array. If the array is empty, then this function returns the same as end ().

另請參閱 constBegin () 和 constEnd ().

QCborArray::const_iterator QCborArray:: cend () const

Returns an array iterator pointing to just after the last element in this array.

另請參閱 constBegin () 和 constEnd ().

void QCborArray:: clear ()

清空此數組。

另請參閱 isEmpty ().

int QCborArray:: compare (const QCborArray & other ) const

比較此數組和 other , comparing each element in sequence, and returns an integer that indicates whether this array should be sorted before (if the result is negative) or after other (if the result is positive). If this function returns 0, the two arrays are equal and contain the same elements.

For more information on CBOR sorting order, see QCborValue::compare ().

另請參閱 QCborValue::compare (), QCborMap::compare (),和 operator== ().

QCborArray::const_iterator QCborArray:: constBegin () const

Returns an array iterator pointing to the first item in this array. If the array is empty, then this function returns the same as end ().

另請參閱 begin () 和 constEnd ().

QCborArray::const_iterator QCborArray:: constEnd () const

Returns an array iterator pointing to just after the last element in this array.

另請參閱 constBegin () 和 end ().

bool QCborArray:: contains (const QCborValue & value ) const

Returns true if this array contains an element that is equal to value .

bool QCborArray:: empty () const

同義詞 isEmpty (). This function is provided for compatibility with generic code that uses the Standard Library API.

返迴 true 若此數組為空 ( size () == 0).

另請參閱 isEmpty () 和 size ().

QCborArray::iterator QCborArray:: end ()

Returns an array iterator pointing to just after the last element in this array.

另請參閱 begin () 和 constEnd ().

QCborArray::const_iterator QCborArray:: end () const

Returns an array iterator pointing to just after the last element in this array.

另請參閱 constBegin () 和 constEnd ().

QCborValue QCborArray:: first () const

返迴第一 QCborValue of this array.

若數組為空,此函數返迴 QCborValue containing an undefined value. For that reason, it is not possible with this function to tell apart the situation where the array is not large enough from the case where the array ends with an undefined value.

另請參閱 operator[] (), at (), last (), insert (), prepend (), append (), removeAt (),和 takeAt ().

QCborValueRef QCborArray:: first ()

Returns a reference to the first QCborValue of this array. The array must not be empty.

QCborValueRef has the exact same API as QCborValue , with one important difference: if you assign new values to it, this map will be updated with that new value.

另請參閱 operator[] (), at (), last (), insert (), prepend (), append (), removeAt (),和 takeAt ().

[static] QCborArray QCborArray:: fromJsonArray (const QJsonArray & array )

Converts all JSON items found in the array array to CBOR using QCborValue::fromJson(), and returns the CBOR array composed of those elements.

This conversion is lossless, as the CBOR type system is a superset of JSON's. Moreover, the array returned by this function can be converted back to the original array by using toJsonArray ().

另請參閱 toJsonArray (), toVariantList (), QCborValue::fromJsonValue (),和 QCborMap::fromJsonObject ().

[static] QCborArray QCborArray:: fromStringList (const QStringList & list )

返迴 QCborArray containing all the strings found in the list 列錶。

另請參閱 fromVariantList () 和 fromJsonArray ().

[static] QCborArray QCborArray:: fromVariantList (const QVariantList & list )

Converts all the items in the list to CBOR using QCborValue::fromVariant () and returns the array composed of those elements.

Conversion from QVariant is not completely lossless. Please see the documentation in QCborValue::fromVariant () 瞭解更多信息。

另請參閱 toVariantList (), fromStringList (), fromJsonArray (),和 QCborMap::fromVariantMap ().

bool QCborArray:: isEmpty () const

返迴 true,若此 QCborArray is empty (that is if size () is 0).

另請參閱 size () 和 clear ().

QCborValue QCborArray:: last () const

Returns the last QCborValue of this array.

若數組為空,此函數返迴 QCborValue containing an undefined value. For that reason, it is not possible with this function to tell apart the situation where the array is not large enough from the case where the array ends with an undefined value.

另請參閱 operator[] (), at (), first (), insert (), prepend (), append (), removeAt (),和 takeAt ().

QCborValueRef QCborArray:: last ()

Returns a reference to the last QCborValue of this array. The array must not be empty.

QCborValueRef has the exact same API as QCborValue , with one important difference: if you assign new values to it, this map will be updated with that new value.

另請參閱 operator[] (), at (), first (), insert (), prepend (), append (), removeAt (),和 takeAt ().

void QCborArray:: pop_back ()

同義詞 removeLast (). This function is provided for compatibility with generic code that uses the Standard Library API.

Removes the last element of this array. The array must not be empty before the removal

另請參閱 removeLast (), takeLast (), pop_front (), push_back (), append (),和 insert ().

void QCborArray:: pop_front ()

同義詞 removeFirst (). This function is provided for compatibility with generic code that uses the Standard Library API.

Removes the first element of this array. The array must not be empty before the removal

另請參閱 removeFirst (), takeFirst (), pop_back (), push_front (), prepend (),和 insert ().

void QCborArray:: push_back (const QCborValue & t )

同義詞 append (). This function is provided for compatibility with generic code that uses the Standard Library API.

追加元素 t 到此數組。

另請參閱 append (), push_front (), pop_back (), prepend (),和 insert ().

void QCborArray:: push_front (const QCborValue & t )

同義詞 prepend (). This function is provided for compatibility with generic code that uses the Standard Library API.

Prepends the element t 到此數組。

另請參閱 prepend (), push_back (), pop_front (), append (),和 insert ().

void QCborArray:: removeAt ( qsizetype i )

Removes the item at position i from the array. The array must have more than i elements before the removal.

另請參閱 takeAt (), removeFirst (), removeLast (), at (), operator[] (), insert (), prepend (),和 append ().

void QCborArray:: removeFirst ()

Removes the first item in the array, making the second element become the first. The array must not be empty before this call.

另請參閱 removeAt (), takeFirst (), removeLast (), at (), operator[] (), insert (), prepend (),和 append ().

void QCborArray:: removeLast ()

Removes the last item in the array. The array must not be empty before this call.

另請參閱 removeAt (), takeLast (), removeFirst (), at (), operator[] (), insert (), prepend (),和 append ().

qsizetype QCborArray:: size () const

返迴此數組的大小。

另請參閱 isEmpty ().

void QCborArray:: swap ( QCborArray & other )

交換此對象的內容和 other .

QCborValue QCborArray:: takeAt ( qsizetype i )

Removes the item at position i from the array and returns it. The array must have more than i elements before the removal.

另請參閱 removeAt (), removeFirst (), removeLast (), at (), operator[] (), insert (), prepend (),和 append ().

QCborValue QCborArray:: takeFirst ()

Removes the first item in the array and returns it, making the second element become the first. The array must not be empty before this call.

另請參閱 takeAt (), removeFirst (), removeLast (), at (), operator[] (), insert (), prepend (),和 append ().

QCborValue QCborArray:: takeLast ()

Removes the last item in the array and returns it. The array must not be empty before this call.

另請參閱 takeAt (), removeLast (), removeFirst (), at (), operator[] (), insert (), prepend (),和 append ().

QCborValue QCborArray:: toCborValue () const

Explicitly construcuts a QCborValue object that represents this array. This function is usually not necessary since QCborValue has a constructor for QCborArray , so the conversion is implicit.

轉換 QCborArray to QCborValue allows it to be used in any context where QCborValues can be used, including as items in QCborArrays and as keys and mapped types in QCborMap . Converting an array to QCborValue allows access to QCborValue::toCbor ().

另請參閱 QCborValue::QCborValue (const QCborArray &).

QJsonArray QCborArray:: toJsonArray () const

Recursively converts every QCborValue element in this array to JSON using QCborValue::toJsonValue () and returns the corresponding QJsonArray composed of those elements.

Please note that CBOR contains a richer and wider type set than JSON, so some information may be lost in this conversion. For more details on what conversions are applied, see QCborValue::toJsonValue ().

另請參閱 fromJsonArray (), QCborValue::toJsonValue (), QCborMap::toJsonObject (),和 toVariantList ().

QVariantList QCborArray:: toVariantList () const

Recursively converts each QCborValue in this array using QCborValue::toVariant () and returns the QVariantList composed of the converted items.

Conversion to QVariant is not completely lossless. Please see the documentation in QCborValue::toVariant () 瞭解更多信息。

另請參閱 fromVariantList (), fromStringList (), toJsonArray (), QCborValue::toVariant (),和 QCborMap::toVariantMap ().

bool QCborArray:: operator!= (const QCborArray & other ) const

比較此數組和 other , comparing each element in sequence, and returns true if the two arrays' contents are different, false otherwise.

For more information on CBOR equality in Qt, see, QCborValue::compare ().

另請參閱 compare (), QCborValue::operator== (), QCborMap::operator== (), operator== (),和 operator< ().

QCborArray QCborArray:: operator+ (const QCborValue & v ) const

返迴新的 QCborArray containing the same elements as this array, plus v appended as the last element.

另請參閱 operator+= (), operator<< (),和 append ().

QCborArray &QCborArray:: operator+= (const QCborValue & v )

追加 v to this array and returns a reference to this array.

另請參閱 append (), insert (), operator+ (),和 operator<< ().

bool QCborArray:: operator< (const QCborArray & other ) const

比較此數組和 other , comparing each element in sequence, and returns true if this array should be sorted before other , false otherwise.

For more information on CBOR sorting order, see QCborValue::compare ().

另請參閱 compare (), QCborValue::operator== (), QCborMap::operator== (), operator== (),和 operator!= ().

QCborArray &QCborArray:: operator<< (const QCborValue & v )

追加 v to this array and returns a reference to this array.

另請參閱 append (), insert (), operator+ (),和 operator+= ().

QCborArray &QCborArray:: operator= (const QCborArray & other )

Replaces the contents of this array with that found in other , then returns a reference to this object.

bool QCborArray:: operator== (const QCborArray & other ) const

比較此數組和 other , comparing each element in sequence, and returns true if both arrays contains the same elements, false otherwise.

For more information on CBOR equality in Qt, see, QCborValue::compare ().

另請參閱 compare (), QCborValue::operator== (), QCborMap::operator== (), operator!= (),和 operator< ().

const QCborValue QCborArray:: operator[] ( qsizetype i ) const

返迴 QCborValue element at position i in the array.

若數組 < i elements, this function returns a QCborValue containing an undefined value. For that reason, it is not possible with this function to tell apart the situation where the array is not large enough from the case where the array contains an undefined value at position i .

另請參閱 at (), first (), last (), insert (), prepend (), append (), removeAt (),和 takeAt ().

QCborValueRef QCborArray:: operator[] ( qsizetype i )

Returns a reference to the QCborValue element at position i in the array. Indices beyond the end of the array will grow the array, filling with undefined entries, until it has an entry at the specified index.

QCborValueRef has the exact same API as QCborValue , with one important difference: if you assign new values to it, this map will be updated with that new value.

另請參閱 at (), first (), last (), insert (), prepend (), append (), removeAt (),和 takeAt ().