Trait StringLookup 

pub trait StringLookup {
    // Required method
    fn lookup(&mut self, v: &str) -> Option<String>;
}

A simple lookup function, used by the StringSource.

Required Methods

fn lookup(&mut self, v: &str) -> Option<String>

Looks up the variable v and returns its value.

Returns None if the variable cannot be found.

Implementations on Foreign Types

impl StringLookup for HashMap<String, String>

fn lookup(&mut self, v: &str) -> Option<String>

Implementors

impl StringLookup for EnvLookup