1 unstable release
0.1.0 | Aug 13, 2024 |
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#1891 in Rust patterns
30 downloads per month
Used in libdebayer
5KB
52 lines
Defvar
makes defining environment variables easy
Defvar
provides a macro for declaring environment variables. It
also makes it easy to describe how to parse the value and provide a
default.
Usage
use defvar::defvar;
use std::time::Duration;
// Defining simple variables is easy.
defvar! { GREETING: String = "Howdy" }
// The macro supports types other than String. You can provide your
// own parsing logic.
defvar! { TIMES: usize = 1, or try t => t.parse() }
// Here is a more complicated example.
defvar! { DURATION: Duration = Duration::from_secs(1), or try d => d.parse().map(Duration::from_secs) }
Dependencies
~47KB