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-rw-r--r--stdlib/source/lux/data/coll/list.lux17
1 files changed, 11 insertions, 6 deletions
diff --git a/stdlib/source/lux/data/coll/list.lux b/stdlib/source/lux/data/coll/list.lux
index b9b743b2c..f6c19dcb9 100644
--- a/stdlib/source/lux/data/coll/list.lux
+++ b/stdlib/source/lux/data/coll/list.lux
@@ -303,16 +303,21 @@
xs')]
($_ compose (sort < pre) (list x) (sort < post)))))
-(do-template [<name> <type> <comp> <inc>]
+(do-template [<name> <type> <lt> <inc> <gt> <dec>]
[(def: #export (<name> from to)
{#.doc "Generates an inclusive interval of values [from, to]."}
(-> <type> <type> (List <type>))
- (if (<comp> to from)
- (list& from (<name> (<inc> from) to))
- (list)))]
+ (cond (<lt> to from)
+ (list& from (<name> (<inc> from) to))
- [i/range Int i/<= i/inc]
- [n/range Nat n/<= n/inc]
+ (<gt> to from)
+ (list& from (<name> (<dec> from) to))
+
+ ## (= to from)
+ (list from)))]
+
+ [i/range Int i/< i/inc i/> i/dec]
+ [n/range Nat n/< n/inc n/> n/dec]
)
(def: #export (empty? xs)