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Merge pull request #1188 from primo-ppcg/if-let

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Calvin Rose
2023-06-11 07:21:38 -05:00
committed by GitHub
parent 0bd6e85c61 2c3ca2984e
commit 7272f43191
2 changed files with 7 additions and 19 deletions
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16
src/boot/boot.janet
View File

@@ -674,21 +674,7 @@
(do
(def bl (in bindings i))
(def br (in bindings (+ 1 i)))
(def atm (idempotent? bl))
(def sym (if atm bl (gensym)))
(if atm
# Simple binding
(tuple 'do
(tuple 'def sym br)
(tuple 'if sym (aux (+ 2 i)) fal))
# Destructured binding
(tuple 'do
(tuple 'def sym br)
(tuple 'if sym
(tuple 'do
(tuple 'def bl sym)
(aux (+ 2 i)))
fal))))))
(tuple 'if (tuple 'def bl br) (aux (+ 2 i)) fal))))
(aux 0))
(defmacro when-let

10
test/suite-boot.janet
View File

@@ -123,10 +123,12 @@
# Some higher order functions and macros
# 5e2de33
(def my-array @[1 2 3 4 5 6])
(def x (if-let [x (get my-array 5)] x))
(assert (= x 6) "if-let")
(def x (if-let [y (get @{} :key)] 10 nil))
(assert (not x) "if-let 2")
(assert (= (if-let [x (get my-array 5)] x) 6) "if-let 1")
(assert (= (if-let [y (get @{} :key)] 10 nil) nil) "if-let 2")
(assert (= (if-let [a my-array k (next a)] :t :f) :t) "if-let 3")
(assert (= (if-let [a my-array k (next a 5)] :t :f) :f) "if-let 4")
(assert (= (if-let [[a b] my-array] a) 1) "if-let 5")
(assert (= (if-let [{:a a :b b} {:a 1 :b 2}] b) 2) "if-let 6")
(assert (= 14 (sum (map inc @[1 2 3 4]))) "sum map")
(def myfun (juxt + - * /))