Ternary operators (turnips) for Rust.
Rather than creating a functional procedural macro to parse yet-another domain-specific syntax (a language within a language), turnip provides the simplest possible solution. The result is recursion without additional function calls and consistency with Rust syntax rules, which does not support overloading the ? and : operators.
The solution is a single 10-line macro defined using macro_rules!. See for yourself. Unlike other solutions out there, such as terny, tern, iffy and ternop, turnip combines simplicity with built-in support for recursion to more closely match a ternary operator design pattern.
What more do you need?
cargo add turnipCreate a new crate and add turnip:
cargo init
cargo add turnipOpen src/main.rs and import the ifelse! macro:
// main.rs
use turnip::ifelse;
fn main() {
let result1: bool = ifelse!(10 < 0, true, false);
let result2: bool = ifelse!(10 < 0, true, 10 == 0, true, false);
assert!(result1 == result2);
}Compile and run the project:
cargo build
cargo runMIT License