A QueryRowStreamIterator is an Input Iterator (see below) that returns a sequence of StatusOr<QueryRow> objects.
As an Input Iterator, the sequence may only be consumed once. Default constructing a QueryRowStreamIterator creates an instance that represents "end".
Constructors
QueryRowStreamIterator()
Default constructs an "end" iterator.
QueryRowStreamIterator(Source)
Constructs a QueryRowStreamIterator that will consume rows from the given source, which must not be nullptr.
| Parameter | |
|---|---|
| Name | Description |
source |
Source
|
Operators
operator*()
| Returns | |
|---|---|
| Type | Description |
reference |
|
operator->()
| Returns | |
|---|---|
| Type | Description |
pointer |
|
operator*() const
| Returns | |
|---|---|
| Type | Description |
const_reference |
|
operator->() const
| Returns | |
|---|---|
| Type | Description |
const_pointer |
|
operator++()
| Returns | |
|---|---|
| Type | Description |
QueryRowStreamIterator & |
|
operator++(int)
| Parameter | |
|---|---|
| Name | Description |
|
int
|
| Returns | |
|---|---|
| Type | Description |
QueryRowStreamIterator |
|
Type Aliases
iterator_category
Alias Of:
std::input_iterator_tag
Iterator type aliases
value_type
Alias Of:
StatusOr< QueryRow >
Iterator type aliases
difference_type
Alias Of:
std::ptrdiff_t
Iterator type aliases
pointer
Alias Of:
value_type *
Iterator type aliases
reference
Alias Of:
value_type &
Iterator type aliases
const_pointer
Alias Of:
value_type const *
Iterator type aliases
const_reference
Alias Of:
value_type const &
Iterator type aliases
Source
Alias Of:
std::function< StatusOr< QueryRow >()>
Returning an empty QueryRow indicates that there are no more rows to be returned.