docgen: implement doc link resolution in current module (#18642)

config/nimdoc.cfg

@@ -56,6 +56,17 @@ $seeSrc
 </div>
 """
 
+# A wrapper of a few overloaded `doc.item`s with the same basic name
+# * $header_plain - see above
+# * $overloadGroupName - the anchor for this whole group
+# * $content - string containing `doc.item`s themselves
+doc.item2 = """
+
+<div id="$overloadGroupName">
+$content
+</div>
+"""
+
 # Chunk of HTML emitted for each entry in the HTML table of contents.
 # See doc.item for available substitution variables.
 

config/nimdoc.tex.cfg

@@ -19,7 +19,8 @@ doc.section.toc = ""
 doc.item = """
 
 \vspace{1em}
-\phantomsection\addcontentsline{toc}{subsection}{$uniqueName}
+\phantomsection\addcontentsline{toc}{subsubsection}{$uniqueName}
+\label{$itemSymOrID}\hypertarget{$itemSymOrID}{}
 
 \begin{rstdocitem}
 $header
@@ -30,6 +31,13 @@ $desc
 \end{addmargin}
 """
 
+doc.item2 = """
+\phantomsection\addcontentsline{toc}{subsection}{$header_plain}
+\label{$overloadGroupName}\hypertarget{$overloadGroupName}{}
+
+$content
+"""
+
 doc.item.toc = ""
 
 doc.toc = r"\tableofcontents \newpage"