hpx 2.5.12

High Performance HTTP Client
Documentation 
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macro_rules! debug {
    ($($arg:tt)+) => {
        {
            #[cfg(feature = "tracing")]
            {
                ::tracing::debug!($($arg)+);
            }
        }
    }
}

macro_rules! trace {
    ($($arg:tt)*) => {
        {
            #[cfg(feature = "tracing")]
            {
                ::tracing::trace!($($arg)+);
            }
        }
    }
}

macro_rules! trace_span {
    ($($arg:tt)*) => {{
        #[cfg(feature = "tracing")]
        {
            Some(::tracing::trace_span!($($arg)+).entered())
        }
        #[cfg(not(feature = "tracing"))]
        {
            None::<()>
        }
    }}
}

macro_rules! warn {
    ($($arg:tt)*) => {
        {
            #[cfg(feature = "tracing")]
            {
                ::tracing::warn!($($arg)+);
            }
        }
    }
}

macro_rules! error {
    ($($arg:tt)*) => {
        {
            #[cfg(feature = "tracing")]
            {
                ::tracing::error!($($arg)+);
            }
        }
    }
}