9mm/lib/equal.fnl

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2024-05-30 01:26:41 +00:00
;; thanks:
;; https://gist.github.com/sapphyrus/fd9aeb871e3ce966cc4b0b969f62f539
;; and antifennel
(fn deep-equals [o1 o2 ignore-mt]
(when (= o1 o2) (lua "return true"))
(local o1-type (type o1))
(local o2-type (type o2))
(when (not= o1-type o2-type) (lua "return false"))
(when (not= o1-type :table) (lua "return false"))
(when (not ignore-mt)
(local mt1 (getmetatable o1))
(when (and mt1 mt1.__eq)
(let [___antifnl_rtn_1___ (= o1 o2)] (lua "return ___antifnl_rtn_1___"))))
(each [key1 value1 (pairs o1)]
(local value2 (. o2 key1))
(when (or (= value2 nil) (= (deep-equals value1 value2 ignore-mt) false))
(lua "return false")))
(each [key2 _ (pairs o2)]
(when (= (. o1 key2) nil) (lua "return false")))
true)
{:equal deep-equals}