1 | fn main() { |
if you have a mutable loan like r = &mut v
, then you can only access the value v
through the reference r
. Accessing v
directly in any way – read, write, or move – would invalidate the loan.
Datalog rules
Differential dataflow is a data-parallel programming framework designed to efficiently process large volumes of data and to quickly respond to arbitrary changes in input collections.
using familiar operators like map
, filter
, join
, and group
.
1 | // create a degree counting differential dataflow |
subsets relationships
1 | fn main() { |
base_subset概念
This input is defined for each borrow expression (e.g., &x
or &mut v
) in the program.