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https://github.com/ETLCPP/etl.git
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08b9c371a0
* Fix histogram test Use different Start index so skipped start_index copy would not get unnoticed in the test. * Fix several test_vector_* for valid data Instead of comparing the moved-from data which is invalid, compare with the valid initial_data. * Fix test_vector to check for the correct iterator position after erase This was done before, but a recent change dropped it. * Fix bit_stream: Guard nbits > 0 to prevent division by zero * Cleanup --------- Co-authored-by: John Wellbelove <jwellbelove@users.noreply.github.com>
83 lines
1.5 KiB
Markdown
83 lines
1.5 KiB
Markdown
---
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title: fixed_iterator
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---
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{{< callout type="info">}}
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Header: `fixed_iterator.h`
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Since: `TBC`
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{{< /callout >}}
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An iterator where increments and decrements are null operations.
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Can be used to copy to or from a fixed address such as a register.
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## Constructor
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```cpp
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template <typename TIterator>
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etl::fixed_iterator();
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```
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```cpp
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template <typename TIterator>
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etl::fixed_iterator(TIterator it);
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```
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```cpp
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template <typename TIterator>
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etl::fixed_iterator(const etl::fixed_iterator&);
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```
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## Access
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```cpp
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Titerator get() const;
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```
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**Description**
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Get the internal iterator.
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```cpp
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void get(TIterator it);
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```
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**Description**
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Set the iterator.
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## Operators
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```cpp
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typename etl::iterator_traits<TIterator>::value_type operator *()
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const typename etl::iterator_traits<TIterator>::value_type operator *() const
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```
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**Description**
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Dereference operators
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---
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```cpp
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TIterator operator ->()
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const TIterator operator ->() const
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```
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**Description**
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Member dereference operators
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---
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```cpp
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operator TIterator() const
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```
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**Description**
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Conversion operator
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## Example
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```cpp
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etl::vector<char, 32> buffer;
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const char* UART_READ = (const char*) 0x1000;
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const char* UART_WRITE = (const char*) 0x1001;
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etl::fixed_iterator<char*> uart_read(UART_READ);
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etl::fixed_iterator<char*> uart_write(UART_WRITE);
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// Read 20 characters from the port.
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std::copy_n(uart_read, 20, std::back_inserter(buffer));
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// Write the buffer of characters to the port.
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std::copy(buffer.begin(), buffer.end(), uart_write);
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```
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