Yandros parse_quote! debug

parse_quote_dbg.rs

// Credits: Yandros#4299

macro_rules! parse_quote {(
    $($code:tt)*
) => ({
    eprintln!("[{}:{}:{}] parse_quote! {{ {} }}", file!(), line!(), column!(), quote!( $($code)* ));
    ::syn::parse_quote!( $($code)* )
})}
    
macro_rules! parse_quote {(
    $($code:tt)*
) => ((|| {
    fn type_of_some<T> (_: Option<T>) -> &'static str { ::core::any::type_name::<T>() }
    let target_ty = None;
    if false { return target_ty.unwrap(); }
    eprintln!("[{}:{}:{}] parse_quote! {{ {} }} as {}", file!(), line!(), column!(), quote!( $($code)* ), type_of_some(target_ty));
    ::syn::parse_quote!( $($code)* )
})())}

macro_rules! parse_quote {(
    $($code:tt)*
) => (
    (|| {
        fn type_of_some<T> (_: Option<T>)
          -> &'static str
        {
            ::core::any::type_name::<T>()
        }
        let target_ty = None; if false { return target_ty.unwrap(); }
        eprintln!(
            "[{}:{}:{}:parse_quote!]\n  - ty: `{ty}`\n  - code: `{code}`",
            file!(), line!(), column!(),
            code = ::quote::quote!( $($code)* ),
            ty = type_of_some(target_ty),
        );
        ::syn::parse_quote!( $($code)* )
    })()
)}