Function syntax::ext::base::get_exprs_from_tts

pub fn get_exprs_from_tts(
    cx: &mut ExtCtxt, 
    sp: Span, 
    tts: &[TokenTree]
) -> Option<Vec<P<Expr>>>

Extracts comma-separated expressions from tts. If there is a parsing error, emit a non-fatal error and return None.