egglog 2.0.0

egglog is a language that combines the benefits of equality saturation and datalog. It can be used for analysis, optimization, and synthesis of programs. It is the successor to the popular rust library egg.
Documentation 
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(relation R (i64 i64))
(R 1 2)
(R 2 3)
(R 3 4)
(R 5 6)

(print-function R)
(print-function R 3)
(print-function R 3 :file "output.R3.log")
(print-function R :file "output.R.log")
(print-function R 3 :file "output.R3.csv.log" :mode csv)
(print-function R :file "output.R.csv.log" :mode csv)

(datatype E (F i64))
(function G (E String) i64 :no-merge)
(set (G (F 1) "1") 1)
(set (G (F 2) "2") 2)
(set (G (F 3) "3") 3)
(set (G (F 4) "4") 4)

(print-function G)
(print-function G 3)
(print-function G 3 :file "output.G3.log" :mode default)
(print-function G :file "output.G.log")
(print-function G 3 :file "output.G3.csv.log" :mode csv)
(print-function G :file "output.G.csv.log" :mode csv)