pub struct Record<'a> { /* private fields */ }
Expand description
The “payload” of a log message.
Use
Record
structures are passed as parameters to the log
method of the Log
trait. Logger implementors manipulate these
structures in order to display log messages. Record
s are automatically
created by the log!
macro and so are not seen by log users.
Note that the level()
and target()
accessors are equivalent to
self.metadata().level()
and self.metadata().target()
respectively.
These methods are provided as a convenience for users of this structure.
Example
The following example shows a simple logger that displays the level,
module path, and message of any Record
that is passed to it.
struct SimpleLogger;
impl log::Log for SimpleLogger {
fn enabled(&self, metadata: &log::Metadata) -> bool {
true
}
fn log(&self, record: &log::Record) {
if !self.enabled(record.metadata()) {
return;
}
println!("{}:{} -- {}",
record.level(),
record.target(),
record.args());
}
fn flush(&self) {}
}
Implementations
sourceimpl<'a> Record<'a>
impl<'a> Record<'a>
sourcepub fn builder() -> RecordBuilder<'a>
pub fn builder() -> RecordBuilder<'a>
Returns a new builder.
sourcepub fn module_path(&self) -> Option<&'a str>
pub fn module_path(&self) -> Option<&'a str>
The module path of the message.
sourcepub fn module_path_static(&self) -> Option<&'static str>
pub fn module_path_static(&self) -> Option<&'static str>
The module path of the message, if it is a 'static
string.
sourcepub fn file_static(&self) -> Option<&'static str>
pub fn file_static(&self) -> Option<&'static str>
The module path of the message, if it is a 'static
string.
sourcepub fn key_values(&self) -> &dyn Source
pub fn key_values(&self) -> &dyn Source
The structured key-value pairs associated with the message.
sourcepub fn to_builder(&self) -> RecordBuilder<'_>
pub fn to_builder(&self) -> RecordBuilder<'_>
Create a new RecordBuilder
based on this record.
Trait Implementations
Auto Trait Implementations
impl<'a> !RefUnwindSafe for Record<'a>
impl<'a> !Send for Record<'a>
impl<'a> !Sync for Record<'a>
impl<'a> Unpin for Record<'a>
impl<'a> !UnwindSafe for Record<'a>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more