⚡ Comptime, Generics, and Capstones

Zig uses comptime parameters for generics. A generic function accepts a type at compile time:

fn max(comptime T: type, a: T, b: T) T {
    return if (a > b) a else b;
}

The compiler generates specialized versions for each type used. Only types that support > will compile.

`T`	`a`	`b`	result
`i32`	`5`	`3`	`5`
`i32`	`-1`	`-5`	`-1`
`u8`	`200`	`100`	`200`
`f64`	`3.14`	`2.71`	`3.14`

Use comptime T: type as the first parameter. Compare with if (a > b) a else b.

Zig

/// Return the larger of two values (works for any comparable type)
fn genericMax(comptime T: type, a: T, b: T) T {
    return if (a > b) a else b;
}