{"ast_node_type":"function","tokens":[{"end":99,"kind":"keyword","start":0,"text":"fn"}]}
    fn try_coercion_cast(&self, fcx: &FnCtxt<'a, 'tcx>) -> Result<(), ty::error::TypeError<'tcx>> {
        match fcx.coerce(self.expr, self.expr_ty, self.cast_ty, AllowTwoPhase::No, None) {