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Diffstat (limited to 'documentation/book/the_lux_programming_language/chapter_4.md')
| -rw-r--r-- | documentation/book/the_lux_programming_language/chapter_4.md | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/documentation/book/the_lux_programming_language/chapter_4.md b/documentation/book/the_lux_programming_language/chapter_4.md index 68feb8121..8387715c6 100644 --- a/documentation/book/the_lux_programming_language/chapter_4.md +++ b/documentation/book/the_lux_programming_language/chapter_4.md @@ -10,7 +10,7 @@ No worries. You're about to find out! First, let's talk about how to make your own functions. -``` +```clojure (function (plus_two x) (inc (inc x))) ``` @@ -21,7 +21,7 @@ What is it's type? Well, I'm glad you asked. -``` +```clojure (: (-> Nat Nat) (function (plus_two x) (inc (inc x)))) ``` @@ -29,7 +29,7 @@ Well, I'm glad you asked. That `->` thingie you see there is a macro for generating function types. It works like this: -``` +```clojure (-> arg1 arg2 ... argN return) ``` @@ -37,7 +37,7 @@ The types of the arguments and the return type can be any type you want (even ot How do we use our function? Just put it at the beginning for a form: -``` +```clojure ((function (plus_two x) (inc (inc x))) 5) ## => 7 ``` @@ -50,7 +50,7 @@ How do we use the `plus_two` function without having to inline its definition (l Well, we just need to define it! -``` +```clojure (def: plus_two (: (-> Nat Nat) (function (_ x) @@ -59,7 +59,7 @@ Well, we just need to define it! Or, alternatively: -``` +```clojure (def: plus_two (-> Nat Nat) (function (_ x) @@ -70,7 +70,7 @@ Notice how the `def:` macro can take the type of its value before the value itse Now, we can use the square function more conveniently. -``` +```clojure (plus_two 7) ## => 9 ``` @@ -79,7 +79,7 @@ Nice! Also, I forgot to mention another form of the `def:` macro which is even more convenient: -``` +```clojure (def: (plus_two x) (-> Nat Nat) (inc (inc x))) @@ -99,7 +99,7 @@ Functions, of course, can take more than one argument, and you can even refer to Check this one out: -``` +```clojure (def: (factorial' acc n) (-> Nat Nat Nat) (if (n.= 0 n) @@ -113,7 +113,7 @@ Check this one out: And if we just had the function expression itself, it would look like this: -``` +```clojure (function (factorial' acc n) (if (n.= 0 n) acc @@ -132,7 +132,7 @@ The reason it exists is that Lux's arithmetic functions are not polymorphic on t If you import the module for `Nat` numbers, like so: -``` +```clojure (.module [library [lux @@ -149,7 +149,7 @@ Also, it might be good to explain that Lux functions can be partially applied. T That means, our factorial function could have been implemented like this: -``` +```clojure (def: factorial (-> Nat Nat) (factorial' +1)) @@ -157,7 +157,7 @@ That means, our factorial function could have been implemented like this: Or, to make it shorter: -``` +```clojure (def: factorial (factorial' +1)) ``` |