Enum LogFormat 

pub enum LogFormat {
    Json,
    LogFmt,
    Terminal,
}

Represents the logging format.

This enum defines the supported formats for logging output. It is used to configure the format layer of a tracing subscriber.

Variants

Json

Represents JSON formatting for logs. This format outputs log records as JSON objects, making it suitable for structured logging.

LogFmt

Represents logfmt (key=value) formatting for logs. This format is concise and human-readable, typically used in command-line applications.

Terminal

Represents terminal-friendly formatting for logs.

Implementations

impl LogFormat

pub fn apply( &self, filter: EnvFilter, color: Option<String>, file_writer: Option<NonBlocking>, ) -> Box<dyn Layer<Registry> + Send + Sync>

Applies the specified logging format to create a new layer.

This method constructs a tracing layer with the selected format, along with additional configurations for filtering and output.

Arguments

• filter - An EnvFilter used to determine which log records to output.
• color - An optional string that enables or disables ANSI color codes in the logs.
• file_writer - An optional NonBlocking writer for directing logs to a file.

Returns

A BoxedLayer<Registry> that can be added to a tracing subscriber.

Trait Implementations

impl Clone for LogFormat

fn clone(&self) -> LogFormat

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LogFormat

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for LogFormat

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for LogFormat

fn eq(&self, other: &LogFormat) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ValueEnum for LogFormat

fn value_variants<'a>() -> &'a [Self]

All possible argument values, in display order.

fn to_possible_value<'a>(&self) -> Option<PossibleValue>

The canonical argument value.

fn from_str(input: &str, ignore_case: bool) -> Result<Self, String>

Parse an argument into Self.

impl Copy for LogFormat

impl Eq for LogFormat

impl StructuralPartialEq for LogFormat

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

• Json: 0 bytes
• LogFmt: 0 bytes
• Terminal: 0 bytes