diff options
Diffstat (limited to 'stdlib/source/library/lux/data/lazy.lux')
| -rw-r--r-- | stdlib/source/library/lux/data/lazy.lux | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/stdlib/source/library/lux/data/lazy.lux b/stdlib/source/library/lux/data/lazy.lux index d3283cfc8..d4b345f87 100644 --- a/stdlib/source/library/lux/data/lazy.lux +++ b/stdlib/source/library/lux/data/lazy.lux @@ -20,6 +20,9 @@ (abstract: #export (Lazy a) (-> [] a) + {#.doc (doc "A value specified by an expression that is calculated only at the last moment possible." + "Afterwards, the value is cached for future reference.")} + (def: (lazy' generator) (All [a] (-> (-> [] a) (Lazy a))) (let [cache (atom.atom #.None)] @@ -33,20 +36,21 @@ (exec (io.run (atom.compare_and_swap _ (#.Some value) cache)) value))))))) - (def: #export (value l_value) + (def: #export (value lazy) (All [a] (-> (Lazy a) a)) - ((:representation l_value) []))) + ((:representation lazy) []))) -(syntax: #export (lazy expr) +(syntax: #export (lazy expression) + {#.doc (doc "Specifies a lazy value by providing the expression that computes it.")} (with_gensyms [g!_] - (in (list (` ((~! lazy') (function ((~ g!_) (~ g!_)) (~ expr)))))))) + (in (list (` ((~! lazy') (function ((~ g!_) (~ g!_)) (~ expression)))))))) -(implementation: #export (equivalence (^open "_\.")) +(implementation: #export (equivalence (^open "\.")) (All [a] (-> (Equivalence a) (Equivalence (Lazy a)))) (def: (= left right) - (_\= (..value left) - (..value right)))) + (\= (..value left) + (..value right)))) (implementation: #export functor (Functor Lazy) |