Struct DebugToggle 

pub struct DebugToggle { /* private fields */ }

A debug toggle cached until an override changes. Unset values can be read without acquiring the cache lock.

Implementations

impl DebugToggle

pub const fn new(name: &'static str) -> DebugToggle

Creates a toggle named after the environment variable name; a programmatic override of the same name takes precedence over the environment.

pub fn with<R>(&self, read: impl FnOnce(Option<&str>) -> R) -> R

Reads the toggle’s value through read.

pub fn is_set(&self) -> bool

Whether the toggle holds any value.

pub fn flag(&self) -> bool

Whether the toggle is switched on: 1, true or yes.

pub fn equals(&self, expected: &str) -> bool

Whether the toggle holds exactly expected.

pub fn parse<T>(&self) -> Option<T>

where T: FromStr,

The toggle parsed as T, when set and well formed.