Derive Macro ServerlessError 

#[derive(ServerlessError)]
{
    // Attributes available to this derive:
    #[error]
}

Derive macro for error types that implement IntoErrorCode.

Example

use server_less::ServerlessError;

#[derive(ServerlessError)]
enum MyError {
    #[error(code = NotFound, message = "User not found")]
    UserNotFound,
    #[error(code = 400)]  // HTTP status also works
    InvalidInput(String),
    // Code inferred from variant name
    Unauthorized,
}

This generates:

• impl IntoErrorCode for MyError
• impl Display for MyError
• impl Error for MyError

Attributes

• #[error(code = X)] - Set error code (ErrorCode variant or HTTP status)
• #[error(message = "...")] - Set custom message

Without attributes, the error code is inferred from the variant name.