[Tolk] Get rid of ~tilda with mutate and self methods

This is a very big change.
If FunC has `.methods()` and `~methods()`, Tolk has only dot,
one and only way to call a `.method()`.
A method may mutate an object, or may not.
It's a behavioral and semantic difference from FunC.

- `cs.loadInt(32)` modifies a slice and returns an integer
- `b.storeInt(x, 32)` modifies a builder
- `b = b.storeInt()` also works, since it not only modifies, but returns
- chained methods also work, they return `self`
- everything works exactly as expected, similar to JS
- no runtime overhead, exactly same Fift instructions
- custom methods are created with ease
- tilda `~` does not exist in Tolk at all

tolk-tester/tests/allow_post_modification.tolk

@@ -4,35 +4,32 @@ fun unsafe_tuple<X>(x: X): tuple
 fun inc(x: int, y: int): (int, int) {
   return (x + y, y * 10);
 }
-fun ~inc(x: int, y: int): (int, int) {
-  (x, y) = inc(x, y);
-  return (x, y);
-}
-
-fun ~incWrap(x: int, y: int): (int, int) {
-  return ~inc(x, y);
+fun `~inc`(mutate self: int, y: int): int {
+  val (newX, newY) = inc(self, y);
+  self = newX;
+  return newY;
 }
 
 @method_id(11)
 fun test_return(x: int): (int, int, int, int, int, int, int) {
-  return (x, x~incWrap(x / 20), x, x = x * 2, x, x += 1, x);
+  return (x, x.`~inc`(x / 20), x, x = x * 2, x, x += 1, x);
 }
 
 @method_id(12)
 fun test_assign(x: int): (int, int, int, int, int, int, int) {
-  var (x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int) = (x, x~inc(x / 20), x, x=x*2, x, x+=1, x);
+  var (x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int) = (x, x.`~inc`(x / 20), x, x=x*2, x, x+=1, x);
   return (x1, x2, x3, x4, x5, x6, x7);
 }
 
 @method_id(13)
 fun test_tuple(x: int): tuple {
-  var t: tuple = unsafe_tuple([x, x~incWrap(x / 20), x, x = x * 2, x, x += 1, x]);
+  var t: tuple = unsafe_tuple([x, x.`~inc`(x / 20), x, x = x * 2, x, x += 1, x]);
   return t;
 }
 
 @method_id(14)
 fun test_tuple_assign(x: int): (int, int, int, int, int, int, int) {
-  var [x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int] = [x, x~inc(x / 20), x, x = x * 2, x, x += 1, x];
+  var [x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int] = [x, x.`~inc`(x / 20), x, x = x * 2, x, x += 1, x];
   return (x1, x2, x3, x4, x5, x6, x7);
 }
 
@@ -42,7 +39,7 @@ fun foo1(x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int): (int, i
 
 @method_id(15)
 fun test_call_1(x: int): (int, int, int, int, int, int, int) {
-  return foo1(x, x~inc(x / 20), x, x = x * 2, x, x += 1, x);
+  return foo1(x, x.`~inc`(x / 20), x, x = x * 2, x, x += 1, x);
 }
 
 fun foo2(x1: int, x2: int, x3456: (int, int, int, int), x7: int): (int, int, int, int, int, int, int) {
@@ -52,7 +49,7 @@ fun foo2(x1: int, x2: int, x3456: (int, int, int, int), x7: int): (int, int, int
 
 @method_id(16)
 fun test_call_2(x: int): (int, int, int, int, int, int, int) {
-  return foo2(x, x~incWrap(x / 20), (x, x = x * 2, x, x += 1), x);
+  return foo2(x, x.`~inc`(x / 20), (x, x = x * 2, x, x += 1), x);
 }
 
 fun asm_func(x1: int, x2: int, x3: int, x4: int, x5: int, x6: int, x7: int): (int, int, int, int, int, int, int)
@@ -61,28 +58,28 @@ asm
 
 @method_id(17)
 fun test_call_asm_old(x: int): (int, int, int, int, int, int, int) {
-  return asm_func(x, x += 1, x, x, x~inc(x / 20), x, x = x * 2);
+  return asm_func(x, x += 1, x, x, x.`~inc`(x / 20), x, x = x * 2);
 }
 
 @method_id(18)
 fun test_call_asm_new(x: int): (int, int, int, int, int, int, int) {
-  return asm_func(x, x~incWrap(x / 20), x, x = x * 2, x, x += 1, x);
+  return asm_func(x, x.`~inc`(x / 20), x, x = x * 2, x, x += 1, x);
 }
 
 global xx: int;
 @method_id(19)
 fun test_global(x: int): (int, int, int, int, int, int, int) {
   xx = x;
-  return (xx, xx~incWrap(xx / 20), xx, xx = xx * 2, xx, xx += 1, xx);
+  return (xx, xx.`~inc`(xx / 20), xx, xx = xx * 2, xx, xx += 1, xx);
 }
 
 @method_id(20)
 fun test_if_else(x: int): (int, int, int, int, int) {
   if (x > 10) {
-    return (x~inc(8), x + 1, x = 1, x <<= 3, x);
+    return (x.`~inc`(8), x + 1, x = 1, x <<= 3, x);
   } else {
     xx = 9;
-    return (x, x~inc(-4), x~inc(-1), x >= 1, x = x + xx);
+    return (x, x.`~inc`(-4), x.`~inc`(-1), x >= 1, x = x + xx);
   }
 }
 
@@ -103,6 +100,12 @@ fun main() {
 @testcase | 20 | 80  | 80 89 1 8 8
 @testcase | 20 | 9   | 9 -40 -10 -1 13
 
-@fif_codegen_avoid ~incWrap
+@fif_codegen
+"""
+  ~inc PROC:<{
+    //  self y
+    inc CALLDICT // self newY
+  }>
+"""
 @code_hash 97139400653362069936987769894397430077752335662822462908581556703209313861576
 */