Derive Macro Generator 

#[derive(Generator)]
{
    // Attributes available to this derive:
    #[generator]
}

Derive macro for automatically implementing the Generator trait

This macro can be applied to structs and enums to automatically generate implementations of the Generator trait.

Basic Usage

use protest::Generator;

#[derive(Generator)]
struct User {
    id: u32,
    name: String,
    active: bool,
}

Customization

The derive macro supports various customization attributes:

use protest::Generator;

#[derive(Generator)]
struct CustomUser {
    #[generator(range = "1..1000")]
    id: u32,
    #[generator(length = "5..20")]
    name: String,
    #[generator(custom = "always_true")]
    active: bool,
}

fn always_true() -> bool {
    true
}

Supported Attributes

• range = "min..max": For numeric types, specifies the range of generated values
• length = "min..max": For collections and strings, specifies the length range
• custom = "function_name": Uses a custom function to generate the field value

Generic Types

The derive macro supports generic types with appropriate bounds:

use protest::Generator;

#[derive(Generator)]
struct GenericStruct<T, U> {
    first: T,
    second: U,
}

Enums

The derive macro supports enums with all variant types:

use protest::Generator;

#[derive(Generator)]
enum Status {
    Active,
    Inactive(String),
    Pending { reason: String },
}