Struct datafusion_rustyline::history::History

pub struct History { /* fields omitted */ }

Current state of the history.

Methods

impl History

pub fn new() -> History

pub fn with_config(config: Config) -> History

pub fn get(&self, index: usize) -> Option<&String>

Return the history entry at position index, starting from 0.

pub fn last(&self) -> Option<&String>

Return the last history entry (i.e. previous command)

pub fn add<S: AsRef<str> + Into<String>>(&mut self, line: S) -> bool

Add a new entry in the history.

pub fn len(&self) -> usize

Return the number of entries in the history.

pub fn is_empty(&self) -> bool

Return true if the history has no entry.

pub fn set_max_len(&mut self, len: usize)

Set the maximum length for the history. This function can be called even if there is already some history, the function will make sure to retain just the latest len elements if the new history length value is smaller than the amount of items already inside the history.

Like [stifle_history](http://cnswww.cns.cwru. edu/php/chet/readline/history.html#IDX11).

pub fn save<P: AsRef<Path> + ?Sized>(&self, path: &P) -> Result<()>

Save the history in the specified file.

pub fn load<P: AsRef<Path> + ?Sized>(&mut self, path: &P) -> Result<()>

Load the history from the specified file.

Errors

Will return Err if path does not already exist or could not be read.

pub fn clear(&mut self)

Clear history

pub fn search(&self, term: &str, start: usize, dir: Direction) -> Option<usize>

Search history (start position inclusive [0, len-1]).

Return the absolute index of the nearest history entry that matches term.

Return None if no entry contains term between [start, len -1] for forward search or between [0, start] for reverse search.

pub fn starts_with(     &self,     term: &str,     start: usize,     dir: Direction ) -> Option<usize>

Anchored search

Important traits for Iter<'a>

impl<'a> Iterator for Iter<'a> type Item = &'a String;

pub fn iter(&self) -> Iter

Return a forward iterator.

Trait Implementations

impl Default for History

fn default() -> History

Returns the "default value" for a type.

impl Index<usize> for History

type Output = String

The returned type after indexing.

fn index(&self, index: usize) -> &String

Performs the indexing (container[index]) operation.

impl<'a> IntoIterator for &'a History

type Item = &'a String

The type of the elements being iterated over.

type IntoIter = Iter<'a>

Which kind of iterator are we turning this into?

Important traits for Iter<'a>

impl<'a> Iterator for Iter<'a> type Item = &'a String;

fn into_iter(self) -> Iter<'a>

Creates an iterator from a value.