Struct LineReader 

pub struct LineReader { /* private fields */ }

A minimal line editor with command history.

Supports:

• Up/Down arrow keys to navigate command history
• Left/Right arrow keys to move the cursor within the line
• Home/End to jump to the beginning/end of the line
• Delete to remove the character under the cursor
• Backspace to remove the character before the cursor
• Ctrl-U to clear the line, Ctrl-K to kill to end of line
• Ctrl-W to delete the previous word
• Ctrl-A / Ctrl-E for Home / End

Implementations

impl LineReader

pub fn new(max_history: usize) -> Self

Create a new LineReader with the given maximum history size.

pub fn read_line( &mut self, prompt: &str, cancel_token: Option<CancellationToken>, ) -> Result<Option<String>>

Read a line interactively with arrow-key history navigation.

Returns Ok(Some(line)) on success, Ok(None) on EOF (Ctrl-D).

pub fn read_line_with_stdin( &mut self, prompt: &str, cancel_token: Option<CancellationToken>, reader: Box<dyn Read>, ) -> Result<Option<String>>

Read a line interactively using a provided reader.

pub fn run_loop<P, H>( &mut self, prompt_fn: P, handler: &H, cancel_token: CancellationToken, ) -> Result<()>

where P: Fn() -> String, H: LineHandler,

Run an interactive REPL loop, delegating each line to handler.

The loop ends when:

• The handler returns Ok(LoopAction::Break)
• EOF is reached (Ctrl-D)
• An I/O error occurs

pub fn run_loop_with_stdin<P, H>( &mut self, prompt_fn: P, handler: &H, cancel_token: CancellationToken, reader: Box<dyn Read>, ) -> Result<()>

where P: Fn() -> String, H: LineHandler,

Run an interactive REPL loop using a provided reader.