Fix types for builder seq

src/org/org_text_link.nim

@@ -36,7 +36,7 @@ let linkParser* = proc(parser: Parser): ParserResult {.closure.} =
     else:
       linkValue
 
-func linkStringifier*(linkUrl: string, linkDescription: Maybe[string]): string =
+proc linkStringifier*(linkUrl: string, linkDescription: Maybe[string]): string =
   case (linkUrl, linkDescription):
     of (@linkUrl, Some(@linkDescription)):
        return &"[[{linkUrl}][{linkDescription}]]"
@@ -46,19 +46,21 @@ func linkStringifier*(linkUrl: string, linkDescription: Maybe[string]): string =
 func linkTokenizer*(parserTokens: seq[ParserToken]): OrgBuilderT =
   [@linkUrl, @linkDescription] := parserTokens.map(tokenStringValue)
   let maybeLinkDescription = linkDescription.just().notEmpty()
-  OrgBuilderT(
+  return OrgBuilderT(
     kind: orgLink,
     content: linkStringifier(linkUrl, maybeLinkDescription),
     linkUrl: linkUrl,
     linkDescription: maybeLinkDescription,
   )
 
+let linkTokenizerSeq* = proc(parserTokens: seq[ParserToken]): seq[OrgBuilderT] {.closure.} =
+  return @[linkTokenizer(parserTokens)]
 
 when isMainModule:
   # echo initParser("[[https://florianschroedl.com]]").linkParser()
   echo initParser("[[https://florianschroedl.com][My blog]]")
   .linkParser()
   .foldTokens(
-    onError = (x) => nothing(OrgBuilderT),
-    onSuccess = xs => just(linkTokenizer(xs)),
+    onError = (x) => newSeq[OrgBuilderT](),
+    onSuccess = proc(xs: seq[ParserToken]): seq[OrgBuilderT] = linkTokenizerSeq(xs),
   )