change loop function so you can write ().loop(() -> do_smth)

examples/02_Calc_Sum.mers

@@ -1,10 +1,10 @@
 total := 0.0
-{() -> {
+().loop(() -> {
   ("Total: ", total, ". Type a number to change.").concat.println
   ().read_line.trim.parse_float.try((
     n -> &total = (total, n).sum,
     // not a number, so return a 1-tuple to break from the loop
     () -> (())
   ))
-}}.loop
+})
 "Goodbye.".println

examples/03_Basic_Calculator.mers

@@ -5,7 +5,7 @@
 
 current := 0.0
 
-{() -> {
+().loop(() -> {
   ("[ ", current, " ]").concat.println
   input := ().read_line.trim
   num := (input, 1).substring.trim.parse_float.try((
@@ -24,4 +24,4 @@ current := 0.0
   } else if input.eq("exit") {
     (())
   }
-}}.loop
+})

examples/04_Greatest_Common_Divisor.mers

@@ -1,5 +1,5 @@
 gcd := vals -> {
-  () -> {
+  ().loop(() -> {
     (a, b) := vals
     if a.eq(b)
       (a)
@@ -7,8 +7,8 @@ gcd := vals -> {
       &vals = (a, b.subtract(a))
     else
       &vals = (a.subtract(b), b)
-  }
-}.loop
+  })
+}
 
 get_num := () -> {
   line := ().read_line.trim

examples/05_Matrix_Multiplicator.mers

@@ -17,7 +17,7 @@ split_once := (s, delim) -> {
 split_ := (s, delim, require_nonempty) -> {
   out := (s).as_list
   &out.pop
-  {
+  ().loop(
     () -> s.split_once(delim).try((
       (s1, s2) -> {
         &s = s2
@@ -30,7 +30,7 @@ split_ := (s, delim, require_nonempty) -> {
         (())
       }
     ))
-  }.loop
+  )
   out
 }
 
@@ -62,9 +62,11 @@ read_matrix_line := width -> {
       if w.eq(0) {
         width = line.len
       } else {
-        {() -> if line.len.subtract(w).signum.eq(-1) {
-          &line.push(0.0)
-        } else (())}.loop
+        ().loop(() ->
+          if line.len.subtract(w).signum.eq(-1) {
+            &line.push(0.0)
+          } else (())
+        )
       }
       (line)
     }
@@ -87,10 +89,12 @@ matrix_get := (matrix, (line, col)) -> {
 leftpad := (str, l) -> {
   str := (str).concat
   d := l.subtract(str.len)
-  {() -> if d.signum.eq(1) {
-    &str = (" ", str).concat
-    &d = d.subtract(1)
-  } else {(())}}.loop
+  ().loop(() ->
+    if d.signum.eq(1) {
+      &str = (" ", str).concat
+      &d = d.subtract(1)
+    } else (())
+  )
   str
 }