Trait EnvSource 

pub trait EnvSource {
    // Required method
    fn var(&self, key: &str) -> Option<OsString>;
}

A source of environment variables, so resolution can be tested without touching the real process environment.

Required Methods

fn var(&self, key: &str) -> Option<OsString>

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<S: AsRef<str>> EnvSource for [(S, S)]

fn var(&self, key: &str) -> Option<OsString>

Implementors

impl EnvSource for ProcessEnv