Struct log::RecordBuilder
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pub struct RecordBuilder<'a> { /* fields omitted */ }
Builder for Record
.
Typically should only be used by log library creators or for testing and "shim loggers".
The RecordBuilder
can set the different parameters of Record
object, and returns
the created object when build
is called.
Examples
use log::{Level, Record}; let record = Record::builder() .args(format_args!("Error!")) .level(Level::Error) .target("myApp") .file(Some("server.rs")) .line(Some(144)) .module_path(Some("server")) .build();
Alternatively, use MetadataBuilder
:
use log::{Record, Level, MetadataBuilder}; let error_metadata = MetadataBuilder::new() .target("myApp") .level(Level::Error) .build(); let record = Record::builder() .metadata(error_metadata) .args(format_args!("Error!")) .line(Some(433)) .file(Some("app.rs")) .module_path(Some("server")) .build();
Methods
impl<'a> RecordBuilder<'a>
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fn new() -> RecordBuilder<'a>
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Construct new RecordBuilder
.
The default options are:
args
:format_args!("")
metadata
:Metadata::builder().build()
module_path
:None
file
:None
line
:None
fn args(&mut self, args: Arguments<'a>) -> &mut RecordBuilder<'a>
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Set args
.
fn metadata(&mut self, metadata: Metadata<'a>) -> &mut RecordBuilder<'a>
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Set metadata
. Construct a Metadata
object with MetadataBuilder
.
fn level(&mut self, level: Level) -> &mut RecordBuilder<'a>
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Set Metadata::level
.
fn target(&mut self, target: &'a str) -> &mut RecordBuilder<'a>
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Set Metadata::target
fn module_path(&mut self, path: Option<&'a str>) -> &mut RecordBuilder<'a>
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Set module_path
fn file(&mut self, file: Option<&'a str>) -> &mut RecordBuilder<'a>
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Set file
fn line(&mut self, line: Option<u32>) -> &mut RecordBuilder<'a>
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Set line
fn build(&self) -> Record<'a>
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Invoke the builder and return a Record