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Fix README example for on_print and on_debug.

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Stephen Chung
2020-04-29 23:03:18 +08:00
parent 21c3edb31e
commit 60b52c142e
2 changed files with 39 additions and 5 deletions
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13
README.md
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@@ -1979,17 +1979,20 @@ engine.on_print(|x| println!("hello: {}", x));
engine.on_debug(|x| println!("DEBUG: {}", x));
// Example: quick-'n-dirty logging
let mut log: Vec<String> = Vec::new();
let logbook = Arc::new(RwLock::new(Vec::<String>::new()));
// Redirect print/debug output to 'log'
engine.on_print(|s| log.push(format!("entry: {}", s)));
engine.on_debug(|s| log.push(format!("DEBUG: {}", s)));
let log = logbook.clone();
engine.on_print(move |s| log.write().unwrap().push(format!("entry: {}", s)));
let log = logbook.clone();
engine.on_debug(move |s| log.write().unwrap().push(format!("DEBUG: {}", s)));
// Evaluate script
engine.eval::<()>(script)?;
// 'log' captures all the 'print' and 'debug' output
for entry in log {
// 'logbook' captures all the 'print' and 'debug' output
for entry in logbook.read().unwrap().iter() {
println!("{}", entry);
}
```