Struct logforth::filter::env::EnvFilterBuilder

pub struct EnvFilterBuilder(/* private fields */);

Available on crate feature env-filter only.

A builder for the env log filter.

It can be used to parse a set of directives from a string before building a EnvFilter instance.

Implementations

impl EnvFilterBuilder

pub fn new() -> Self

Initializes the filter builder with defaults.

pub fn try_from_env(env: &str) -> Option<Self>

Try to initialize the filter builder from an environment; return None if the environment variable is not set or invalid.

pub fn filter_module(self, module: &str, level: LevelFilter) -> Self

Adds a directive to the filter for a specific module.

pub fn filter_level(self, level: LevelFilter) -> Self

Adds a directive to the filter for all modules.

pub fn filter(self, module: Option<&str>, level: LevelFilter) -> Self

Adds a directive to the filter.

The given module (if any) will log at most the specified level provided. If no module is provided then the filter will apply to all log messages.

pub fn try_parse(self, filters: &str) -> Result<Self>

Parses the directive string, returning an error if the given directive string is invalid.

See the env_logger documentation for more details.

pub fn parse(self, filters: &str) -> Self

Parses the directives string.

See the env_logger documentation for more details.

Trait Implementations

impl Debug for EnvFilterBuilder

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

Formats the value using the given formatter.

impl Default for EnvFilterBuilder

fn default() -> EnvFilterBuilder

Returns the “default value” for a type.