--gc:destructors: next steps; WIP

lib/system/strmantle.nim

@@ -278,3 +278,21 @@ proc nimBoolToStr(x: bool): string {.compilerRtl.} =
 proc nimCharToStr(x: char): string {.compilerRtl.} =
   result = newString(1)
   result[0] = x
+
+proc `$`(x: uint64): string =
+  if x == 0:
+    result = "0"
+  else:
+    result = newString(60)
+    var i = 0
+    var n = x
+    while n != 0:
+      let nn = n div 10'u64
+      result[i] = char(n - 10'u64 * nn + ord('0'))
+      inc i
+      n = nn
+    result.setLen i
+
+    let half = i div 2
+    # Reverse
+    for t in 0 .. half-1: swap(result[t], result[i-t-1])