repline: Add a code sample demonstrating the use of prebaked::read_and

examples/repl_float.rs

@@ -0,0 +1,17 @@
+//! Demonstrates the use of [read_and()]:
+//! 
+//! The provided closure:
+//! 1. Takes a line of input (a [String])
+//! 2. Performs some calculation (using [FromStr])
+//! 3. Returns a [Result] containing a [Response] or an [Err]
+
+use repline::{prebaked::read_and, Response};
+use std::{error::Error, str::FromStr};
+
+fn main() -> Result<(), Box<dyn Error>> {
+    read_and("\x1b[33m", "  >", " ?>", |line| {
+        println!("-> {:?}", f64::from_str(line.trim())?);
+        Ok(Response::Accept)
+    })?;
+    Ok(())
+}