Trait EnvCapability 

pub trait EnvCapability: Clone + Debug {
    // Required methods
    fn new() -> Self;
    fn get(&self, name: &str) -> Result<Option<String>, EnvError>;
}

Required Methods

fn new() -> Self

fn get(&self, name: &str) -> Result<Option<String>, EnvError>

Read an env var.

Ok(None) means the variable is unset; Err(NotUnicode) means it is set but its value is not valid UTF-8. Callers that treat “missing” and “invalid” the same should collapse both branches explicitly.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors