Error parsing reStructuredText hyperlink inside directive

[cmorve-te]

The indented hyperlink reference in https://github.com/llvm/llvm-project/blob/36a0d442eb4d2f1e0782bc2a1b1715fc7631faec/clang-tools-extra/docs/clang-tidy/checks/modernize/pass-by-value.rst?plain=1#L153, inside a "seealso" directive, is not corrected parsed by pandoc 3.5

# /pandoc-3.5/bin/pandoc /pass-by-value.rst -f rst -t html5 > /pass-by-value_pandoc.html
[WARNING] Reference not found for 'want speed? pass by value' at /pass-by-value.rst_chunk line 3 column 87

if the document is changed to remove the spaces before the .., it works correctly

-  .. _Want Speed? Pass by Value: https://web.archive.org/web/20140205194657/http://cpp-next.com/archive/2009/08/want-speed-pass-by-value/
+.. _Want Speed? Pass by Value: https://web.archive.org/web/20140205194657/http://cpp-next.com/archive/2009/08/want-speed-pass-by-value/

"seealso" is a sphinx directive, but if replaced with "note" rst2html parses everything correctly (without a need to remove the spaces before the ..):

$ rst2html pass-by-value.rst > pass-by-value.html
$ grep -F 'Want Speed? Pass by Value' pass-by-value.html 
<p class="last">For more information about the pass-by-value idiom, read: <a class="reference external" href="https://web.archive.org/web/20140205194657/http://cpp-next.com/archive/2009/08/want-speed-pass-by-value/">Want Speed? Pass by Value</a>.</p>

[jgm]

I believe this is because we do an initial pass to find link references, and we only look at those at the outer level. Fixing this would require, at least, making that first parsing pass more complete.

[jgm]

Question: is this definition scoped to the indented context?
Or can you link to `Want Speed? Pass by Value`_. elsewhere in the document?

[cmorve-te]

According to rst2html they are not scoped:

• You can link from elsewhere
• If you add another definition with the same name in global scope, or even inside another directive, it errors complaining about the duplicate