STL rework

- fixed lots of bugs
- overlay libraries work correctly and reliably
- the STL is an overlay library
- examples updated

examples/list-processing/fn.orc

@@ -1,15 +0,0 @@
-export Y := \f.(\x.f (x x))(\x.f (x x))
-
-export loop $r on (..$parameters) with ...$tail =0x5p129=> Y (\$r.
-  bind_names (..$parameters) (...$tail)
-) ..$parameters
-
--- bind each of the names in the first argument as a parameter for the second argument
-bind_names ($name ..$rest) $payload =0x1p250=> \$name. bind_names (..$rest) $payload
-bind_names () (...$payload) =0x1p250=> ...$payload
-
-export ...$prefix $ ...$suffix:1 =0x1p39=> ...$prefix (...$suffix)
-export ...$prefix |> $fn ..$suffix:1 =0x2p32=> $fn (...$prefix) ..$suffix
-
-export (...$argv) => ...$body =0x2p129=> (bind_names (...$argv) (...$body))
-$name => ...$body =0x1p129=> (\$name. ...$body)

examples/list-processing/list.orc

@@ -1,41 +0,0 @@
-import option
-import super::fn::*
-
-pair := \a.\b. \f. f a b
-
--- Constructors
-
-export cons := \hd.\tl. option::some (pair hd tl)
-export end := option::none
-
-export pop := \list.\default.\f.list default \cons.cons f
-
--- Operators
-
-export reduce := \list.\acc.\f. (
-  loop r on (list acc) with
-    pop list acc \head.\tail. r tail (f acc head)
-)
-
-export map := \list.\f. (
-  loop r on (list) with
-    pop list end \head.\tail. cons (f head) (r tail)
-)
-
-export skip := \list.\n. (
-  loop r on (list n) with
-    if n == 0 then list
-    else pop list end \head.\tail. r tail (n - 1)
-)
-
-export take := \list.\n. (
-  loop r on (list n) with
-    if n == 0 then end
-    else pop list end \head.\tail. cons head $ r tail $ n - 1
-)
-
-new[...$item, ...$rest:1] =0x2p84=> (cons (...$item) new[...$rest])
-new[...$end] =0x1p84=> (cons (...$end) end)
-new[] =0x1p84=> end
-
-export ::(new)

examples/list-processing/main.orc

@@ -1,6 +1,4 @@
-import std::(to_string, print)
-import super::list
-import fn::*
+import std::(proc::*, io::print, to_string)
 
 export main := do{
   let foo = list::new[1, 2, 3, 4, 5, 6];

examples/list-processing/option.orc

@@ -1,6 +0,0 @@
-export some := \v. \d.\f. f v
-export none := \d.\f. d
-
-export map := \option.\f. option none f
-export flatten := \option. option none \opt. opt
-export flatmap := \option.\f. option none \opt. map opt f