https://github.com/rob2309/env-cast-rs

Macro to parse an environment variable into a numeric type at compile time
https://github.com/rob2309/env-cast-rs

Last synced: over 1 year ago
JSON representation

Macro to parse an environment variable into a numeric type at compile time

• Host: GitHub
• URL: https://github.com/rob2309/env-cast-rs
• Owner: Rob2309
• License: mit
• Created: 2022-02-15T07:05:50.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-30T09:29:58.000Z (over 3 years ago)
• Last Synced: 2025-03-10T04:50:16.393Z (over 1 year ago)
• Language: Rust
• Size: 5.86 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# env-cast

![MIT license](https://img.shields.io/crates/l/env-cast?style=for-the-badge)

[![crates.io version](https://img.shields.io/crates/v/env-cast?style=for-the-badge)](https://crates.io/crates/env-cast)

[![CI](https://img.shields.io/github/actions/workflow/status/rob2309/env-cast-rs/ci.yaml?label=CI&style=for-the-badge)](https://github.com/Rob2309/env-cast-rs/actions/workflows/ci.yaml)

[![docs](https://img.shields.io/docsrs/env-cast?style=for-the-badge)](https://docs.rs/env-cast)

`env_cast!` reads an environment variable just like `env!("XXX")`, but parses it into a specific type.

Supported types are currently

`i8, u8, i16, u16, i32, u32, i64, u64, f32, f64`.

## Example

```rust

use env_cast::env_cast;

let PKG_MAJOR: u32 = env_cast!("CARGO_PKG_VERSION_MAJOR" as u32);

```