Derive Macro Validate 

#[derive(Validate)]
{
    // Attributes available to this derive:
    #[validate]
}

Derives a Validate trait impl.

Supported #[validate(...)] rules:

• email — email format validation
• required — non-empty validation
• length(min=N, max=N) — length range validation
• range(min=N, max=N) — numeric range validation
• regex(pattern=r"...") — regex match validation
• contains(value="...") — contains substring validation
• does_not_contain(value="...") — does not contain substring validation
• if = "condition" — conditional validation

Example

#[derive(Validate)]
struct User {
    #[validate(email)]
    email: String,
    #[validate(length(min=2, max=50))]
    name: String,
    #[validate(range(min=0, max=150))]
    age: i64,
}