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38 lines
717 B
38 lines
717 B
use std::io::stderr;
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use std::io::Write;
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pub trait Logger {
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fn write(&mut self, &str);
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fn debug(&mut self, &str);
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}
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pub struct StdErrLogger;
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impl Logger for StdErrLogger {
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fn debug(&mut self, str: &str) {
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writeln!(&mut stderr(), "{}", str).unwrap();
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}
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fn write(&mut self, str: &str) {
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writeln!(&mut stderr(), "{}", str).unwrap();
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}
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}
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pub struct FilteringLogger<'a> {
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logger: &'a mut dyn Logger,
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}
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impl<'a> FilteringLogger<'a> {
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pub fn new(logger: &'a mut dyn Logger) -> Self {
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FilteringLogger { logger }
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}
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}
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impl<'a> Logger for FilteringLogger<'a> {
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fn debug(&mut self, _str: &str) {}
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fn write(&mut self, str: &str) {
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self.logger.write(str)
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}
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}
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#[cfg(test)]
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mod test {}
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