Struct ProcessEnv 

pub struct ProcessEnv;

The live process environment.

Every lookup reads through to std::env::var, so a variable changed after this value was created is visible to the next lookup. This is the environment a Terminal uses when built over process stdio or the controlling terminal.

Two things follow from going through std::env::var, and neither is true of EnvList: a value that is not valid Unicode reads as absent rather than panicking, and on Windows names match case-insensitively.

Trait Implementations

impl Clone for ProcessEnv

fn clone(&self) -> ProcessEnv

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ProcessEnv

impl Debug for ProcessEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ProcessEnv

fn default() -> ProcessEnv

Returns the “default value” for a type.

impl Env for ProcessEnv

fn get(&self, key: &str) -> Option<String>

Return a variable’s value.

fn has(&self, key: &str) -> bool

Return whether a variable is present with a non-empty value.