143 lines
3.2 KiB
Plaintext
143 lines
3.2 KiB
Plaintext
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---
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source: tests/output.rs
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expression: "get_stdout(path, &[\"log::Metadata\"])"
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---
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log Struct log::Metadata rusty-man
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SYNOPSIS
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pub struct Metadata<'a> { /* fields omitted */ }
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DESCRIPTION
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Metadata about a log message.
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# Use
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`Metadata` structs are created when users of the library use logging macros.
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They are consumed by implementations of the `Log` trait in the `enabled` method.
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`Record`s use `Metadata` to determine the log message's severity and target.
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Users should use the `log_enabled!` macro in their code to avoid constructing expensive log
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messages.
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# Examples
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ⓘ
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use log::{Record, Level, Metadata};
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struct MyLogger;
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impl log::Log for MyLogger {
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fn enabled(&self, metadata: &Metadata) -> bool {
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metadata.level() <= Level::Info
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}
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fn log(&self, record: &Record) {
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if self.enabled(record.metadata()) {
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println!("{} - {}", record.level(), record.args());
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}
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}
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fn flush(&self) {}
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}
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METHODS
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impl<'a> Metadata<'a>
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builder
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pub fn builder() -> MetadataBuilder<'a>
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Returns a new builder.
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level
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pub fn level(&self) -> Level
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The verbosity level of the message.
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target
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pub fn target(&self) -> &'a str
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The name of the target of the directive.
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IMPLEMENTATIONS
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Trait Implementations
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Clone
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impl<'a> Clone for Metadata<'a>
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Debug
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impl<'a> Debug for Metadata<'a>
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Eq
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impl<'a> Eq for Metadata<'a>
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Hash
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impl<'a> Hash for Metadata<'a>
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Ord
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impl<'a> Ord for Metadata<'a>
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PartialEq
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impl<'a> PartialEq<Metadata<'a>> for Metadata<'a>
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PartialOrd
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impl<'a> PartialOrd<Metadata<'a>> for Metadata<'a>
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StructuralEq
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impl<'a> StructuralEq for Metadata<'a>
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StructuralPartialEq
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impl<'a> StructuralPartialEq for Metadata<'a>
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Auto Trait Implementations
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RefUnwindSafe
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impl<'a> RefUnwindSafe for Metadata<'a>
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Send
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impl<'a> Send for Metadata<'a>
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Sync
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impl<'a> Sync for Metadata<'a>
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Unpin
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impl<'a> Unpin for Metadata<'a>
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UnwindSafe
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impl<'a> UnwindSafe for Metadata<'a>
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Blanket Implementations
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Any
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impl<T> Any for T
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where
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T: 'static + ?Sized,
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Borrow
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impl<T> Borrow<T> for T
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where
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T: ?Sized,
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BorrowMut
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impl<T> BorrowMut<T> for T
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where
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T: ?Sized,
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From
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impl<T> From<T> for T
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Into
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impl<T, U> Into<U> for T
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where
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U: From<T>,
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ToOwned
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impl<T> ToOwned for T
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where
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T: Clone,
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TryFrom
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impl<T, U> TryFrom<U> for T
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where
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U: Into<T>,
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TryInto
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impl<T, U> TryInto<U> for T
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where
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U: TryFrom<T>,
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