Macro assert_tokens_empty 

macro_rules! assert_tokens_empty {
    ($value:expr) => { ... };
}

Asserts that a token stream or Output produces no tokens.

Accepts any type implementing ToTokens. On failure, prints the token content.

Examples

let output = zyn::Output::from(proc_macro2::TokenStream::new());
zyn::assert_tokens_empty!(output);