Struct Var 

pub(super) struct Var<'env, 'lookup, T> {
    lookup: &'lookup (dyn Fn(&str) -> Option<String> + 'env),
    key: EnvKey,
    checks: Vec<fn(EnvKey, T) -> Result<T>>,
    aliases: Vec<EnvKey>,
}

Fields

lookup: &'lookup (dyn Fn(&str) -> Option<String> + 'env)

key: EnvKey

checks: Vec<fn(EnvKey, T) -> Result<T>>

aliases: Vec<EnvKey>

Implementations

impl<T> Var<'_, '_, T>

where T: EnvParse,

pub(super) fn check(self, check: fn(EnvKey, T) -> Result<T>) -> Self

pub(super) fn alias(self, alias: &'static str) -> Self

pub(super) fn required(self) -> Result<T>

pub(super) fn default(self, default: T) -> Result<T>

pub(super) fn optional(self) -> Result<Option<T>>

fn load(&self) -> Option<EnvValue>

fn load_key(&self, key: EnvKey) -> Option<EnvValue>

fn parse(&self, value: EnvValue) -> Result<T>

fn validate(&self, key: EnvKey, value: T) -> Result<T>