Mark a preserves template as used

src/preserves.nim

@@ -695,8 +695,7 @@ proc toPreserve*[T](x: T; E = void): Preserve[E] =
   elif T is SomeInteger:
     result = Preserve[E](kind: pkSignedInteger, int: x.BiggestInt)
   elif T is object:
-    trace T, " is object"
-    template fieldToPreserve(key: string; val: typed): Preserve =
+    template fieldToPreserve(key: string; val: typed): Preserve {.used.} =
       when x.dot(key).hasCustomPragma(preservesSymbol):
         toSymbol(val, E)
       elif x.dot(key).hasCustomPragma(preservesLiteral):
@@ -708,7 +707,6 @@ proc toPreserve*[T](x: T; E = void): Preserve[E] =
     elif T.hasCustomPragma(preservesOr):
       var hasKind, hasVariant: bool
       for k, v in x.fieldPairs:
-        trace T, ": iterate to ", k
         if k == "orKind":
           assert(not hasKind)
           hasKind = true
@@ -716,8 +714,6 @@ proc toPreserve*[T](x: T; E = void): Preserve[E] =
           assert(hasKind and not hasVariant)
           result = fieldToPreserve(k, v)
           hasVariant = true
-      if not hasVariant:
-        trace T, ": no value found"
     elif T.hasCustomPragma(preservesRecord):
       result = Preserve[E](kind: pkRecord)
       for k, v in x.fieldPairs:
@@ -733,7 +729,6 @@ proc toPreserve*[T](x: T; E = void): Preserve[E] =
         else:
           result.sequence.add(fieldToPreserve(label, field))
     elif T.hasCustomPragma(preservesDictionary):
-      trace T, ": convert to a dictionary"
       result = initDictionary[E]()
       for key, val in x.fieldPairs:
         result[toSymbol(key, E)] = fieldToPreserve(key, val)
@@ -919,7 +914,6 @@ proc fromPreserve*[T, E](v: var T; pr: Preserve[E]): bool =
             inc i
         result = result and (i == pr.len)
     elif T.hasCustomPragma(preservesDictionary):
-      trace T, " is a preservesDictionary"
       if pr.isDictionary:
         result = true
         var i: int