Struct qt_core::q_json_object::Iterator
source · #[repr(C)]pub struct Iterator { /* private fields */ }
Expand description
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
C++ class: QJsonObject::iterator
.
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
QJsonObject::iterator allows you to iterate over a QJsonObject and to modify the value (but not the key) stored under a particular key. If you want to iterate over a const QJsonObject, you should use QJsonObject::const_iterator. It is generally good practice to use QJsonObject::const_iterator on a non-const QJsonObject as well, unless you need to change the QJsonObject through the iterator. Const iterators are slightly faster, and improve code readability.
The default QJsonObject::iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonObject function like QJsonObject::begin(), QJsonObject::end(), or QJsonObject::find() before you can start iterating.
Multiple iterators can be used on the same object. Existing iterators will however become dangling once the object gets modified.
Implementations§
source§impl Iterator
impl Iterator
sourcepub unsafe fn add_assign(&self, j: c_int) -> Ref<Iterator>
pub unsafe fn add_assign(&self, j: c_int) -> Ref<Iterator>
Advances the iterator by j items. (If j is negative, the iterator goes backward.)
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator+=(int j)
.
Advances the iterator by j items. (If j is negative, the iterator goes backward.)
See also operator-=() and operator+().
sourcepub unsafe fn copy_from(
&self,
other: impl CastInto<Ref<Iterator>>
) -> Ref<Iterator>
pub unsafe fn copy_from( &self, other: impl CastInto<Ref<Iterator>> ) -> Ref<Iterator>
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator=(const QJsonObject::iterator& other)
.
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
QJsonObject::iterator allows you to iterate over a QJsonObject and to modify the value (but not the key) stored under a particular key. If you want to iterate over a const QJsonObject, you should use QJsonObject::const_iterator. It is generally good practice to use QJsonObject::const_iterator on a non-const QJsonObject as well, unless you need to change the QJsonObject through the iterator. Const iterators are slightly faster, and improve code readability.
The default QJsonObject::iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonObject function like QJsonObject::begin(), QJsonObject::end(), or QJsonObject::find() before you can start iterating.
Multiple iterators can be used on the same object. Existing iterators will however become dangling once the object gets modified.
sourcepub unsafe fn dec(&self) -> Ref<Iterator>
pub unsafe fn dec(&self) -> Ref<Iterator>
The prefix -- operator (--i
) makes the preceding item current and returns an iterator pointing to the new current item.
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator--()
.
The prefix – operator (–i
) makes the preceding item current and returns an iterator pointing to the new current item.
Calling this function on QHash::begin() leads to undefined results.
See also operator++().
sourcepub unsafe fn dec_postfix(&self, arg1: c_int) -> CppBox<Iterator>
pub unsafe fn dec_postfix(&self, arg1: c_int) -> CppBox<Iterator>
This is an overloaded function.
Calls C++ function: QJsonObject::iterator QJsonObject::iterator::operator--(int arg1)
.
This is an overloaded function.
The postfix -- operator (i--
) makes the preceding item current and returns an iterator pointing to the previously current item.
sourcepub unsafe fn inc(&self) -> Ref<Iterator>
pub unsafe fn inc(&self) -> Ref<Iterator>
The prefix ++ operator (++i
) advances the iterator to the next item in the hash and returns an iterator to the new current item.
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator++()
.
The prefix ++ operator (++i
) advances the iterator to the next item in the hash and returns an iterator to the new current item.
Calling this function on QHash::end() leads to undefined results.
See also operator--().
sourcepub unsafe fn inc_postfix(&self, arg1: c_int) -> CppBox<Iterator>
pub unsafe fn inc_postfix(&self, arg1: c_int) -> CppBox<Iterator>
This is an overloaded function.
Calls C++ function: QJsonObject::iterator QJsonObject::iterator::operator++(int arg1)
.
This is an overloaded function.
The postfix ++ operator (i++
) advances the iterator to the next item in the hash and returns an iterator to the previously current item.
sourcepub unsafe fn indirection(&self) -> CppBox<QJsonValueRef>
pub unsafe fn indirection(&self) -> CppBox<QJsonValueRef>
Returns a modifiable reference to the current item's value.
Calls C++ function: QJsonValueRef QJsonObject::iterator::operator*() const
.
sourcepub unsafe fn key(&self) -> CppBox<QString>
pub unsafe fn key(&self) -> CppBox<QString>
Returns the current item's key as a const reference.
Calls C++ function: QString QJsonObject::iterator::key() const
.
Returns the current item’s key as a const reference.
There is no direct way of changing an item's key through an iterator, although it can be done by calling QHash::erase() followed by QHash::insert() or QHash::insertMulti().
See also value().
sourcepub unsafe fn new_0a() -> CppBox<Iterator>
pub unsafe fn new_0a() -> CppBox<Iterator>
Constructs an uninitialized iterator.
Calls C++ function: [constructor] void QJsonObject::iterator::iterator()
.
Constructs an uninitialized iterator.
Functions like key(), value(), and operator++() must not be called on an uninitialized iterator. Use operator=() to assign a value to it before using it.
See also QJsonObject::begin() and QJsonObject::end().
sourcepub unsafe fn new_2a(
obj: impl CastInto<Ptr<QJsonObject>>,
index: c_int
) -> CppBox<Iterator>
pub unsafe fn new_2a( obj: impl CastInto<Ptr<QJsonObject>>, index: c_int ) -> CppBox<Iterator>
Constructs an uninitialized iterator.
Calls C++ function: [constructor] void QJsonObject::iterator::iterator(QJsonObject* obj, int index)
.
Warning: no exact match found in C++ documentation. Below is the C++ documentation for iterator::iterator()
:
Constructs an uninitialized iterator.
Functions like key(), value(), and operator++() must not be called on an uninitialized iterator. Use operator=() to assign a value to it before using it.
See also QJsonObject::begin() and QJsonObject::end().
sourcepub unsafe fn new_copy(other: impl CastInto<Ref<Iterator>>) -> CppBox<Iterator>
pub unsafe fn new_copy(other: impl CastInto<Ref<Iterator>>) -> CppBox<Iterator>
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
Calls C++ function: [constructor] void QJsonObject::iterator::iterator(const QJsonObject::iterator& other)
.
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
QJsonObject::iterator allows you to iterate over a QJsonObject and to modify the value (but not the key) stored under a particular key. If you want to iterate over a const QJsonObject, you should use QJsonObject::const_iterator. It is generally good practice to use QJsonObject::const_iterator on a non-const QJsonObject as well, unless you need to change the QJsonObject through the iterator. Const iterators are slightly faster, and improve code readability.
The default QJsonObject::iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonObject function like QJsonObject::begin(), QJsonObject::end(), or QJsonObject::find() before you can start iterating.
Multiple iterators can be used on the same object. Existing iterators will however become dangling once the object gets modified.
sourcepub unsafe fn sub_assign(&self, j: c_int) -> Ref<Iterator>
pub unsafe fn sub_assign(&self, j: c_int) -> Ref<Iterator>
Makes the iterator go back by j items. (If j is negative, the iterator goes forward.)
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator-=(int j)
.
Makes the iterator go back by j items. (If j is negative, the iterator goes forward.)
See also operator+=() and operator-().
sourcepub unsafe fn value(&self) -> CppBox<QJsonValueRef>
pub unsafe fn value(&self) -> CppBox<QJsonValueRef>
Returns a modifiable reference to the current item's value.
Calls C++ function: QJsonValueRef QJsonObject::iterator::value() const
.
Trait Implementations§
source§impl Add<i32> for &Iterator
impl Add<i32> for &Iterator
source§fn add(self, j: c_int) -> CppBox<Iterator>
fn add(self, j: c_int) -> CppBox<Iterator>
Returns an iterator to the item at j positions forward from this iterator. (If j is negative, the iterator goes backward.)
Calls C++ function: QJsonObject::iterator QJsonObject::iterator::operator+(int j) const
.
Returns an iterator to the item at j positions forward from this iterator. (If j is negative, the iterator goes backward.)
This operation can be slow for large j values.
See also operator-().
source§impl CppDeletable for Iterator
impl CppDeletable for Iterator
source§unsafe fn delete(&self)
unsafe fn delete(&self)
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
Calls C++ function: [destructor] void QJsonObject::iterator::~iterator()
.
The QJsonObject::iterator class provides an STL-style non-const iterator for QJsonObject.
QJsonObject::iterator allows you to iterate over a QJsonObject and to modify the value (but not the key) stored under a particular key. If you want to iterate over a const QJsonObject, you should use QJsonObject::const_iterator. It is generally good practice to use QJsonObject::const_iterator on a non-const QJsonObject as well, unless you need to change the QJsonObject through the iterator. Const iterators are slightly faster, and improve code readability.
The default QJsonObject::iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonObject function like QJsonObject::begin(), QJsonObject::end(), or QJsonObject::find() before you can start iterating.
Multiple iterators can be used on the same object. Existing iterators will however become dangling once the object gets modified.
source§impl Decrement for Iterator
impl Decrement for Iterator
source§unsafe fn dec(&self) -> Ref<Iterator>
unsafe fn dec(&self) -> Ref<Iterator>
The prefix -- operator (--i
) makes the preceding item current and returns an iterator pointing to the new current item.
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator--()
.
The prefix – operator (–i
) makes the preceding item current and returns an iterator pointing to the new current item.
Calling this function on QHash::begin() leads to undefined results.
See also operator++().
source§impl Increment for Iterator
impl Increment for Iterator
source§unsafe fn inc(&self) -> Ref<Iterator>
unsafe fn inc(&self) -> Ref<Iterator>
The prefix ++ operator (++i
) advances the iterator to the next item in the hash and returns an iterator to the new current item.
Calls C++ function: QJsonObject::iterator& QJsonObject::iterator::operator++()
.
The prefix ++ operator (++i
) advances the iterator to the next item in the hash and returns an iterator to the new current item.
Calling this function on QHash::end() leads to undefined results.
See also operator--().
source§impl Indirection for Iterator
impl Indirection for Iterator
source§unsafe fn indirection(&self) -> CppBox<QJsonValueRef>
unsafe fn indirection(&self) -> CppBox<QJsonValueRef>
Returns a modifiable reference to the current item's value.
Calls C++ function: QJsonValueRef QJsonObject::iterator::operator*() const
.
§type Output = CppBox<QJsonValueRef>
type Output = CppBox<QJsonValueRef>
source§impl PartialEq<Ref<ConstIterator>> for Iterator
impl PartialEq<Ref<ConstIterator>> for Iterator
source§fn eq(&self, other: &Ref<ConstIterator>) -> bool
fn eq(&self, other: &Ref<ConstIterator>) -> bool
Returns true
if other points to the same item as this iterator; otherwise returns false
.
Calls C++ function: bool QJsonObject::iterator::operator==(const QJsonObject::const_iterator& other) const
.
Returns true
if other points to the same item as this iterator; otherwise returns false
.
See also operator!=().
source§impl PartialEq<Ref<Iterator>> for Iterator
impl PartialEq<Ref<Iterator>> for Iterator
source§fn eq(&self, other: &Ref<Iterator>) -> bool
fn eq(&self, other: &Ref<Iterator>) -> bool
Returns true
if other points to the same item as this iterator; otherwise returns false
.
Calls C++ function: bool QJsonObject::iterator::operator==(const QJsonObject::iterator& other) const
.
Returns true
if other points to the same item as this iterator; otherwise returns false
.
See also operator!=().
source§impl Sub<i32> for &Iterator
impl Sub<i32> for &Iterator
source§fn sub(self, j: c_int) -> CppBox<Iterator>
fn sub(self, j: c_int) -> CppBox<Iterator>
Returns an iterator to the item at j positions backward from this iterator. (If j is negative, the iterator goes forward.)
Calls C++ function: QJsonObject::iterator QJsonObject::iterator::operator-(int j) const
.
Returns an iterator to the item at j positions backward from this iterator. (If j is negative, the iterator goes forward.)
This operation can be slow for large j values.
See also operator+().