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Merge pull request #1480 from pyrmont/bugfix.fallback-compare

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Fix fallback support in polymorphic compare
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Calvin Rose 2024-07-31 06:05:27 -07:00 committed by GitHub
commit d1104b5a65
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1 changed files with 11 additions and 5 deletions
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16
src/boot/boot.janet
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@ -819,11 +819,17 @@
(defmacro- do-compare
[x y]
~(if (def f (get ,x :compare))
(f ,x ,y)
(if (def f (get ,y :compare))
(- (f ,y ,x))
(cmp ,x ,y))))
~(do
(def f (get ,x :compare))
(def f-res (if f (f ,x ,y)))
(if f-res
f-res
(do
(def g (get ,y :compare))
(def g-res (if g (- (g ,y ,x))))
(if g-res
g-res
(cmp ,x ,y))))))
(defn compare
``Polymorphic compare. Returns -1, 0, 1 for x < y, x = y, x > y respectively.