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//@ run-pass macro_rules! list { ( ($($id:ident),*) ) => (()); ( [$($id:ident),*] ) => (()); ( {$($id:ident),*} ) => (()); } macro_rules! tt_list { ( ($($tt:tt),*) ) => (()); } pub fn main() { list!( () ); list!( [] ); list!( {} ); tt_list!( (a, b, c) ); tt_list!( () ); }