Function tract_kaldi::parser::if_then_else

pub fn if_then_else<'a, T>(
    condition: bool, 
    then: impl Fn(&'a [u8]) -> IResult<&'a [u8], T>, 
    otherwise: impl Fn(&'a [u8]) -> IResult<&'a [u8], T>
) -> impl Fn(&'a [u8]) -> IResult<&'a [u8], T>