basic printers, type printers, some fixes, part of expression printers

tests/formatting.langexp

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+// import
+
+:: x = y : func1 func2 func3 func4 func5;
+
+:: x = y :
+  func1
+  func2
+  func3
+  func4
+  func5;
+
+// type
+
+: info
+@a annotation info
+Type = @a A;
+
+Type 'A 'B 'C = @a1 'A | @b2 'B | @c2 'C;
+
+Type 'A 'B 'C
+  = @a1 'A | @b2 'B | @c2 'C;
+
+Type
+  'A
+  'B
+  'C
+  = @a1 'A | @b2 'B | @c2 'C;
+
+Type 'A 'B 'C =
+  | & @a1 'A
+    & @b1 'B
+    & @c1 'C
+  | @a2 'A & @b2 'B & @c2 'C;
+
+Type
+  'A
+  'B
+  'C
+  =
+  | & @a1 'A
+    & @b1 'B
+    & @c1 'C
+  | @a2 'A & @b2 'B & @c2 'C;
+
+Type {
+
+func1;
+
+func2;
+
+func3;
+
+}
+
+// typeclass
+
+: info
+#Typeclass;
+
+#Typeclass : #A #B #C;
+
+#Typeclass :
+  #A
+  #B
+  #C;
+
+// function
+
+: info
+@a annotation info
+func 'a;
+
+func 'a 'b 'c : A B C -> D;
+
+func
+  'a
+  'b
+  'c
+  : A B C -> D;
+
+func 'a 'b 'c
+  : A B C -> D;
+
+func
+  'a
+  'b
+  'c
+  : A B C -> D
+
+func 'a 'b 'c
+  :
+  A
+  B
+  C
+  -> D;
+
+func
+  'a
+  'b
+  'c
+  :
+  A
+  B
+  C
+  -> D;
+
+// flow control
+
+func = {
+  x := y => do_something
+    := z
+      => do_something;
+
+  @ => do_something;
+
+  @ a => do_something;
+
+  @ a
+    => do_something;
+
+  @ a : b => do_something;
+
+  @ a : b
+    => do_something;
+
+}
+
+// operators, containers, modifiers
+
+func {
+
+  x + y;
+
+  x
+  + y;
+
+  {
+    expr;
+    expr;
+    expr;
+  };
+
+  [[ expr expr expr ]];
+
+  [[
+    expr
+    expr
+    expr
+  ]];
+
+  return x;
+
+  return
+    x;
+
+  %x;
+
+  a[b];
+
+  a[
+    b];
+
+  a.11;
+
+  break;
+
+  <> x;
+
+  x?;
+
+// other
+
+func {
+
+  x
+  .func a b c;
+
+  x
+  .func
+    a
+    b
+    c;
+
+  Type.func a b c;
+
+  Type.func
+    a
+    b
+    c;
+
+  Type @a x @b y @c z;
+
+  Type
+    @a x
+    @b y
+    @c z;
+
+  \ 'x 'y 'z => x;
+
+  \ 'x
+    'y
+    'z
+    => x;
+
+  \ 'x 'y 'z
+    => x;
+
+  \ 'x
+    'y
+    'z
+    =>
+    x;
+
+  (x);
+
+  (
+    x
+  );
+}
+
+
+
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