{"ast_node_type":"variable","tokens":[{"end":24,"kind":"keyword","start":0,"text":"let"}]}
            let masked =
            let mask_value_cast = bx.context.new_cast(None, mask_value, bx.i32_type);
                bx.context.new_rvalue_from_int(bx.i32_type, in_len as i32) & mask_value_cast;