9 releases (5 breaking)
new 0.7.3 | May 29, 2024 |
---|---|
0.7.2 | May 24, 2024 |
0.6.0 | May 18, 2024 |
0.5.0 | May 15, 2024 |
0.2.1 | May 15, 2024 |
#14 in #evaluator
681 downloads per month
65KB
1.5K
SLoC
repl-block
Synopsis
This crate provides a simple and easy way to build a Read-Eval-Print-Loop
,
a.k.a. REPL.
Usage
Add a dependency on this crate to your project's Cargo.toml
:
[dependencies]
repl-block= "0.7.3"
Then one can use the ReplBuilder
type to build an start a REPL like this:
use repl_block::prelude::{ReplBuilder, ReplBlockResult, Utf8PathBuf};
fn main() -> ReplBlockResult<()> {
let mut evaluator = /* initialize your evaluator */;
let path = Utf8PathBuf::try_from(env::current_dir()?)?.join(".repl.history");
ReplBuilder::default()
// Explicitly register .repl.history as the history file:
.history_filepath(path)
// Register the evaluator; the default evaluator fn is NOP
.evaluator(|query: &str| {
match evaluator.evaluate(query) {
Ok(value) => println!("{value}"),
Err(err) => println!("{err}"),
}
Ok(())
})
.build()? // Use `self` to build a REPL
.start()?;
Ok(())
}
Dependencies
~5–12MB
~127K SLoC