Struct TerminalIo 

pub struct TerminalIo { /* private fields */ }

A NarjuIo over a rustyline editor: highlighted, history-backed line input on stdin, plain println! output.

Implementations

impl TerminalIo

pub fn new() -> Result<Self, NarjuError>

Construct the editor and load any existing history. Fails when there is no usable terminal, which is why non-interactive embeddings use HeadlessIo instead.

pub fn save_history(&mut self)

Persist history to disk. Idempotent; safe to call multiple times. Errors are silently ignored — history loss isn’t worth panicking over.

Trait Implementations

impl NarjuIo for TerminalIo

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

Read one line of input, displaying prompt where that makes sense. Returns Ok(None) at end of input (EOF, Ctrl-D, or an exhausted script), which the floor’s read maps to nil.

fn print(&mut self, s: &str) -> Result<(), NarjuError>

Write one line of output (no trailing newline in s; the implementation supplies it).