Struct cli_log::Metadata [−][src]
pub struct Metadata<'a> { /* fields omitted */ }
Expand description
Metadata about a log message.
Use
Metadata
structs are created when users of the library use
logging macros.
They are consumed by implementations of the Log
trait in the
enabled
method.
Record
s use Metadata
to determine the log message’s severity
and target.
Users should use the log_enabled!
macro in their code to avoid
constructing expensive log messages.
Examples
use log::{Record, Level, Metadata}; struct MyLogger; impl log::Log for MyLogger { fn enabled(&self, metadata: &Metadata) -> bool { metadata.level() <= Level::Info } fn log(&self, record: &Record) { if self.enabled(record.metadata()) { println!("{} - {}", record.level(), record.args()); } } fn flush(&self) {} }
Implementations
Trait Implementations
impl<'a> Ord for Metadata<'a>
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impl<'a> Ord for Metadata<'a>
[src]impl<'a> PartialOrd<Metadata<'a>> for Metadata<'a>
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impl<'a> PartialOrd<Metadata<'a>> for Metadata<'a>
[src]pub fn partial_cmp(&self, other: &Metadata<'a>) -> Option<Ordering>
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pub fn partial_cmp(&self, other: &Metadata<'a>) -> Option<Ordering>
[src]This method returns an ordering between self
and other
values if one exists. Read more
#[must_use]fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn lt(&self, other: &Rhs) -> bool
1.0.0[src]This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn le(&self, other: &Rhs) -> bool
1.0.0[src]This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
impl<'a> Eq for Metadata<'a>
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impl<'a> StructuralEq for Metadata<'a>
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impl<'a> StructuralPartialEq for Metadata<'a>
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Auto Trait Implementations
impl<'a> RefUnwindSafe for Metadata<'a>
impl<'a> Send for Metadata<'a>
impl<'a> Sync for Metadata<'a>
impl<'a> Unpin for Metadata<'a>
impl<'a> UnwindSafe for Metadata<'a>
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more