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#[cfg_attr(test, mockall::automock)]
pub trait Listener: Send + Sync {
fn warning(&self, s: String);
fn info(&self, s: String);
}
pub struct NoOpListener;
impl Listener for NoOpListener {
fn info(&self, _s: String) {}
fn warning(&self, _s: String) {}
}
pub struct StdErrListener {
pub verbose: bool,
}
impl Listener for StdErrListener {
fn warning(&self, s: String) {
eprintln!("warning: {}", s);
}
fn info(&self, s: String) {
if self.verbose {
eprintln!("info: {}", s);
}
}
}