remove commented out old code

test/tserialization.nim

@@ -205,17 +205,6 @@ suite "Serialization":
     assert result[3] == NegInf
     assert classify(result[4]) == fcNan
 
-  #test "Load nil string":
-  #  let input = "!<tag:nimyaml.org,2016:nil:string> \"\""
-  #  var result: string
-  #  load(input, result)
-  #  assert result.len == 0
-  #
-  #test "Dump nil string":
-  #  let input: string = ""
-  #  var output = dump(input, tsNone, asTidy, blockOnly)
-  #  assertStringEqual yamlDirs & "\n!n!nil:string \"\"", output
-
   test "Load timestamps":
     let input = "[2001-12-15T02:59:43.1Z, 2001-12-14t21:59:43.10-05:00, 2001-12-14 21:59:43.10-5]"
     var result: seq[Time]
@@ -237,17 +226,6 @@ suite "Serialization":
     var output = dump(input, tsNone, asTidy, blockOnly)
     assertStringEqual yamlDirs & "\n- a\n- b", output
 
-  #test "Load nil seq":
-  #  let input = "!<tag:nimyaml.org,2016:nil:seq> \"\""
-  #  var result: seq[int]
-  #  load(input, result)
-  #  assert result.len == 0
-  #
-  #test "Dump nil seq":
-  #  let input: seq[int] = @[]
-  #  var output = dump(input, tsNone, asTidy, blockOnly)
-  #  assertStringEqual yamlDirs & "\n!n!nil:seq \"\"", output
-
   test "Load char set":
     let input = "- a\n- b"
     var result: set[char]
@@ -641,31 +619,6 @@ next:
     assert result.c == "cde"
     assert result.d == "d"
 
-  #when not defined(JS):
-  #  test "Load nil values":
-  #    let input = "- ~\n- !!str ~"
-  #    var result: seq[ref string]
-  #    try: load(input, result)
-  #    except YamlConstructionError:
-  #      let ex = (ref YamlConstructionError)(getCurrentException())
-  #      echo "line ", ex.line, ", column ", ex.column, ": ", ex.msg
-  #      echo ex.lineContent
-  #      raise ex
-  #
-  #    assert(result.len == 2)
-  #    assert(result[0] == nil)
-  #    assert(result[1][] == "~")
-  #
-  #  test "Dump nil values":
-  #    var input = newSeq[ref string]()
-  #    input.add(nil)
-  #    input.add(new string)
-  #    input[1][] = "~"
-  #    var output = dump(input, tsRootOnly, asTidy, blockOnly)
-  #    assertStringEqual(yamlDirs &
-  #        "!n!system:seq(tag:yaml.org;2002:str) \n- !!null ~\n- !!str ~",
-  #        output)
-
   test "Custom constructObject":
     let input = "- 1\n- !test:BetterInt 2"
     var result: seq[BetterInt]

yaml/serialization.nim

@@ -1154,10 +1154,6 @@ proc constructChild*(s: var YamlStream, c: ConstructionContext,
                      result: var string) =
   let item = s.peek()
   if item.kind == yamlScalar:
-    #if item.scalarTag == yTagNimNilString:
-    #  discard s.next()
-    #  result = ""
-    #  return
     if item.scalarTag notin
         [yTagQuestionMark, yTagExclamationMark, yamlTag(string)]:
       raise s.constructionError("Wrong tag for string")
@@ -1238,8 +1234,6 @@ proc constructChild*[O](s: var YamlStream, c: ConstructionContext,
     raise e
 
 proc representChild*(value: string, ts: TagStyle, c: SerializationContext) =
-  #if value.len == 0: c.put(scalarEvent("", yTagNimNilString))
-  #else:
   let tag = presentTag(string, ts)
   representObject(value, ts, c,
                   if tag == yTagQuestionMark and guessType(value) != yTypeUnknown:
@@ -1248,8 +1242,6 @@ proc representChild*(value: string, ts: TagStyle, c: SerializationContext) =
                     tag)
 
 proc representChild*[T](value: seq[T], ts: TagStyle, c: SerializationContext) =
-  #if value.len == 0: c.put(scalarEvent("", yTagNimNilSeq))
-  #else:
   representObject(value, ts, c, presentTag(seq[T], ts))
 
 proc representChild*[O](value: ref O, ts: TagStyle, c: SerializationContext) =

yaml/taglib.nim

@@ -89,11 +89,6 @@ const
     ## This tag is used in serialization for the name of a field of an
     ## object. It may contain any string scalar that is a valid Nim symbol.
 
-  #yTagNimNilString* : TagId = 101.TagId ## for strings that are nil
-  #yTagNimNilSeq*    : TagId = 102.TagId ## \
-  ## for seqs that are nil. This tag is used regardless of the seq's generic
-  ## type parameter.
-
   yFirstStaticTagId* : TagId = 1000.TagId ## \
     ## The first ``TagId`` assigned by the ``setTagId`` templates.
 
@@ -211,8 +206,6 @@ proc initSerializationTagLibrary*(): TagLibrary =
   result.tags[y"value"]      = yTagValue
   result.tags[y"binary"]     = yTagBinary
   result.tags[n"field"]      = yTagNimField
-  #result.tags[n"nil:string"] = yTagNimNilString
-  #result.tags[n"nil:seq"]    = yTagNimNilSeq
 
 var
   serializationTagLibrary* = initSerializationTagLibrary() ## \
@@ -275,8 +268,6 @@ static:
   registeredUris.add(y"binary")
   # special tags used by serialization
   registeredUris.add(n"field")
-  #registeredUris.add(n"nil:string")
-  #registeredUris.add(n"nil:seq")
 
 # tags for Nim's standard types
 setTagUri(char, n"system:char", yTagNimChar)