diff options
Diffstat (limited to 'examples/hello.halk')
| -rw-r--r-- | examples/hello.halk | 59 |
1 files changed, 31 insertions, 28 deletions
diff --git a/examples/hello.halk b/examples/hello.halk index 06a3d95..8b6b038 100644 --- a/examples/hello.halk +++ b/examples/hello.halk @@ -1,37 +1,40 @@ -[comments in square brackets] +` comments in backticks ` -[preprocessor directives] -#INCLUDE 'math.halk'; [looks for a 'math.halk' file in the cwd, then ~/halk/include] -#INCLUDE 'io' AS ''; [bring everything in 'io' into global scope] +` preprocessor directives ` +#INCLUDE.'math', 'm'; ` bring the math library into scope, under the namespace 'm' ` +#INCLUDE.'io', ''; ` bring the io library into global scope (with no namespace) ` -let.hello -> 'hello, '; [variables must be given a value at declaration] +str:hello = 'hello, '; ` variables must be given a value at declaration ` -let.PI => math:PI; [namespaces are accessed with a ':''] - [constants are denoted with a '=>'] +int:PI = math/PI; ` namespaces are accessed with a '/'' ` -fn.greeting,to -> { [functions defined with: `fn.<name>,<argument>,..., -> {<body>};`] - let.message -> strcat.hello,to; [functions are right-associative] +void:greeting. str:to = { ` functions declared the same way as variables, but with a . after + the name, followed by arguments ` - stdo.message; [since 'io' was brought into global scope, we - do not prefix it with a namespace/] -}; + str:message = strcat.hello, to; ` function application is right-associative ` -fn.sum_all,_ -> { [variadic functions are possible with the reserved '_' argument, - which is treated as an array] - return.foldl.sum,0,_; -}; + stdo.message; ` since 'io' was brought into global scope, we + do not prefix it with a namespace/ ` +} -fn.fibonacci,n -> { - if.or.(eq.n, 0), (eq.n, 1) -> { [functions ending in '?' should be predicates] +int:sum_all. any[]:_ = { ` variadic functions are possible with the reserved '_' argument, + which is treated as an array ` + return.foldl.sum, 0, _; +} + +int:fibonacci. int:n = { + if.(eq.n, 0), { return.1; - }; - return.sum. - (fibonacci. sub.n, 1), - (fibonacci. sub.n, 2); -}; - -fn.main -> { [where our code will begin executing] - greeting.[comments can be placed *anywhere*]'world.'; - exit.0; [exit with code 0 for success] -}; + }, { + return.sum. + (fibonacci.(sub.n, 1)), + (fibonacci.(sub.n, 2)); + } +} + +int:main. str[]:args = { ` where code will begin executing ` + greeting.` comments can be placed *anywhere* `'world.'; + + return.0; +} |