Attribute Macro attribute 

#[attribute]

Extracts a specific attribute value into a variable.

This attribute macro retrieves a specific attribute by key and makes it available as a typed variable from the request context.

Usage

use hyperlane::*;
use hyperlane_macros::*;
use serde::{Deserialize, Serialize};

const TEST_ATTRIBUTE_KEY: &str = "test_attribute_key";

#[derive(Debug, Serialize, Deserialize, Clone)]
struct TestData {
    name: String,
    age: u32,
}

#[route("/attribute")]
struct Attribute;

impl ServerHook for Attribute {
    async fn new(_ctx: &Context) -> Self {
        Self
    }

    #[response_body(&format!("request attribute: {request_attribute_option:?}"))]
    #[attribute(TEST_ATTRIBUTE_KEY => request_attribute_option: TestData)]
    async fn handle(self, ctx: &Context) {}
}

The macro accepts a key-to-variable mapping in the format key => variable_name: Type. The variable will be available as an Option<Type> in the function scope.