Struct DebugToggle 

pub struct DebugToggle { /* private fields */ }

A debug toggle read on a hot path: the environment is consulted once and the value kept until an override changes, so a per-frame check costs a lock, not a getenv walk of the whole environment.

Implementations

impl DebugToggle

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

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: FromStr>(&self) -> Option<T>

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