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::*;

/// Filters requests based on a boolean condition.
///
/// The function continues execution only if the provided code block returns `true`.
///
/// # Arguments
///
/// - `TokenStream` - A code block that returns a boolean value.
/// - `TokenStream` - The function to which the attribute is applied.
/// - `Position` - The position to inject the code.
///
/// # Returns
///
/// - `TokenStream` - The modified function wrapped with a conditional guard;
///   the original function body is executed only if the condition is `true`,
///   otherwise the function returns early without doing anything.
pub(crate) fn filter_macro(
    attr: TokenStream,
    item: TokenStream,
    position: Position,
) -> TokenStream {
    let condition: Expr = parse_macro_input!(attr as Expr);
    inject(position, item, |_| {
        quote! {
            if !(#condition) {
                return;
            }
        }
    })
}