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use crate::parser::VarName; use std::fmt; impl fmt::Display for VarName { fn fmt(&self, f:&mut fmt::Formatter) -> Result<(), fmt::Error> { write!(f, "{}",self.0) } } impl fmt::Debug for VarName { fn fmt(&self, f:&mut fmt::Formatter) -> Result<(),fmt::Error> { write!(f, "VarName(`{}`)",self.0) } }