Trait EnvSource 

pub(crate) trait EnvSource: Send + Sync {
    // Required methods
    fn var(&self, key: &str) -> Option<OsString>;
    fn vars(&self) -> Vec<(String, String)>;
}

Read-only access to the process environment.

Required Methods

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

The value of a single variable, or None if it is unset.

fn vars(&self) -> Vec<(String, String)>

Every variable as a (name, value) pair. SystemEnv reads std::env::vars, which panics on a non-Unicode entry.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl EnvSource for SystemEnv