diff options
Diffstat (limited to '')
| -rw-r--r-- | stdlib/source/lux.lux | 11 | ||||
| -rw-r--r-- | stdlib/source/lux/control/concatenative.lux | 2 |
2 files changed, 10 insertions, 3 deletions
diff --git a/stdlib/source/lux.lux b/stdlib/source/lux.lux index 641e8693d..6b29d7c42 100644 --- a/stdlib/source/lux.lux +++ b/stdlib/source/lux.lux @@ -5603,10 +5603,10 @@ (macro: #export (undefined tokens) {#;doc (doc "Meant to be used as a stand-in for functions with undefined implementations." "Undefined expressions will type-check against everything, so they make good dummy implementations." + "However, if an undefined expression is ever evaluated, it will raise a runtime error." (def: (square x) (-> Int Int) - (undefined)) - "If an undefined expression is ever evaluated, it will raise an error.")} + (undefined)))} (case tokens #;Nil (return (list (` (error! "Undefined behavior.")))) @@ -5761,3 +5761,10 @@ _ (#;Left "Wrong syntax for char"))) + +(def: #export (when test f) + (All [a] (-> Bool (-> a a) (-> a a))) + (function [value] + (if test + (f value) + value))) diff --git a/stdlib/source/lux/control/concatenative.lux b/stdlib/source/lux/control/concatenative.lux index 61a6ddbd0..cdb9cc457 100644 --- a/stdlib/source/lux/control/concatenative.lux +++ b/stdlib/source/lux/control/concatenative.lux @@ -1,4 +1,4 @@ -(;module: [lux #- if loop +(;module: [lux #- if loop when n.+ n.- n.* n./ n.% n.= n.< n.<= n.> n.>= i.+ i.- i.* i./ i.% i.= i.< i.<= i.> i.>= d.+ d.- d.* d./ d.% d.= d.< d.<= d.> d.>= |