hyperlane-macros 17.0.9

A comprehensive collection of procedural macros for building HTTP servers with enhanced functionality. This crate provides attribute macros that simplify HTTP request handling, protocol validation, response management, and request data extraction.
Documentation 
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use crate::*;

/// Creates a version check function for HTTP version validation.
///
/// # Arguments
///
/// - `&proc_macro2::Ident` - The HTTP version identifier as an ident.
///
/// # Returns
///
/// Returns a closure that generates the version check code.
pub(crate) fn create_version_check(
    version: &proc_macro2::Ident,
) -> impl FnOnce(&Ident) -> TokenStream2 {
    let version_str: String = version.to_string();
    move |context| {
        let check_fn: proc_macro2::Ident = Ident::new(&format!("is_{version_str}"), context.span());
        quote! {
            if !#context.get_request().get_version().#check_fn() {
                return;
            }
        }
    }
}

/// Implements a version check macro.
///
/// This macro generates a handler function for a specific HTTP version check.
/// It expands to a check that aborts the request if the HTTP version does not match.
///
/// # Arguments
///
/// - `$name` - The name of the generated handler function.
/// - `$submit_name` - The string name for macro registration as an ident.
/// - `$version` - The HTTP version identifier as an ident.
macro_rules! impl_version_check_macro {
    ($name:ident, $submit_name:ident, $version:ident) => {
        pub(crate) fn $name(item: TokenStream, position: Position) -> TokenStream {
            inject(
                position,
                item,
                create_version_check(&proc_macro2::Ident::new(
                    stringify!($version),
                    proc_macro2::Span::call_site(),
                )),
            )
        }
    };
}

impl_version_check_macro!(http0_9_version_macro, http0_9_version, http0_9);
impl_version_check_macro!(http1_0_version_macro, http1_0_version, http1_0);
impl_version_check_macro!(http1_1_version_macro, http1_1_version, http1_1);
impl_version_check_macro!(http2_version_macro, http2_version, http2);
impl_version_check_macro!(http3_version_macro, http3_version, http3);
impl_version_check_macro!(
    http1_1_or_higher_version_macro,
    http1_1_or_higher_version,
    http1_1_or_higher
);
impl_version_check_macro!(http_version_macro, http_version, http);
impl_version_check_macro!(unknown_version_macro, unknown_version, unknown);