# [−][src]Trait log::Log

    pub trait Log: Sync + Send {
        fn enabled(&self, metadata: &LogMetadata) -> bool;
        fn log(&self, record: &LogRecord);
    }

A trait encapsulating the operations required of a logger

## Required methods

### `fn enabled(&self, metadata: &LogMetadata) -> bool`

Determines if a log message with the specified metadata would be logged.

This is used by the `log_enabled!` macro to allow callers to avoid expensive computation of log message arguments if the message would be discarded anyway.

### `fn log(&self, record: &LogRecord)`

Logs the `LogRecord`.

Note that `enabled` is not necessarily called before this method. Implementations of `log` should perform all necessary filtering internally.

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## Implementors

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