September-october commit

- manual parser
- stl refinements
- all language constructs are now Send

examples/calculator/main.orc

@@ -1,4 +1,4 @@
-import std::(proc::*, to_float, to_string, panic, str::char_at)
+import std::(to_float, to_string, panic, string::char_at)
 
 export const main := do{
   cps print "left operand: ";
@@ -6,7 +6,6 @@ export const main := do{
   let a = to_float data;
   cps print "operator: ";
   cps op = readln;
-  let op = char_at op 0;
   cps println ("you selected \"" ++ op ++ "\"");
   cps print "right operand: ";
   cps data = readln;

examples/file-browser/main.orc

@@ -1,18 +1,17 @@
 import system::(io, directfs, async)
-import std::proc::*
 import std::(to_string, to_uint, inspect)
 
-const folder_view := \path.\next. do{
+const folder_view := \path. \next. do{
   cps println $ "Contents of " ++ directfs::os_print path;
   cps entries = async::block_on $ directfs::read_dir path;
   cps list::enumerate entries
-    |> list::map (pass \id. pass \name.\is_dir.
+    |> list::map (pass \id. pass \name. \is_dir.
       println $ to_string id ++ ": " ++ directfs::os_print name ++ if is_dir then "/" else ""
     )
     |> list::chain;
   cps print "select an entry, or .. to move up: ";
   cps choice = readln;
-  if (choice == "..\n") then do {
+  if (choice == "..") then do {
     let parent_path = directfs::pop_path path
       |> option::unwrap
       |> tuple::pick 0 2;

examples/hello-world/main.orc

@@ -1,5 +1,7 @@
+import std::exit_status
+
 const main := (
   println "Hello, world!"
-    "success"
+    exit_status::success
 )
 -- main := "Hello, World!\n"

examples/list-processing/main.orc

@@ -1,4 +1,4 @@
-import std::(proc::*, to_string)
+import std::to_string
 
 export const main := do{
   let foo = list::new[1, 2, 3, 4, 5, 6];
@@ -6,7 +6,7 @@ export const main := do{
   let sum = bar
     |> list::skip 2
     |> list::take 3
-    |> list::reduce (\a.\b. a + b)
+    |> list::reduce (\a. \b. a + b)
     |> option::unwrap;
   cps println $ to_string sum;
   0

examples/maps/main.orc

@@ -1,4 +1,4 @@
-import std::(proc::*, to_string)
+import std::to_string
 
 export const main := do{
   let foo = map::new[