Trait EnvVarName 

pub trait EnvVarName {
    const NAME: &'static str;
}

Names the environment variable that an EnvVarOpt reads.

Declare implementors with make_env_var! rather than by hand.

Required Associated Constants

const NAME: &'static str

The environment variable name.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

impl EnvVarName for HomeVarName

const NAME: &'static str = "HOME"

impl EnvVarName for PathVarName

const NAME: &'static str = "PATH"

impl EnvVarName for RustBacktraceVarName

const NAME: &'static str = "RUST_BACKTRACE"

impl EnvVarName for RustLogVarName

const NAME: &'static str = "RUST_LOG"

impl EnvVarName for UserVarName

const NAME: &'static str = "USER"