support for bibtex/natbib command \citeyearpar (equivalent to biblatex command \parencite*) [improving compatibility]

[saudbinayed]

I have not tried this package in LaTeX yet, but it looks very handy and a game changer (for sure) to boost citation formatting!

I always work with "author-year" (e.g. Harvard family) citation styles. Usually, I have several citations in the form of "year-only" as the author(s) are typed explicitly in the text. The latex commands are \citeyearpar in natbib/bibtex, or the \parencite* in biblatex.

This package ("citation-style-language"/ "citeproc-lua") appears to not provide the translation of the above ("year-only") citation commands. I have scanned the source files in this repo and found the "suppress-author" property, defined at: #L199

I am curious to see if the following code can provide the needed feature (i.e. to define a translation for the \citeyearpar and \parencite*):

Edits to the file: ./latex/citation-style-language-cite.sty

• Add this at Line #34:

\NewDocumentCommand \citeyearpar { o o m } { \__csl_cite_year:nnn {#1} {#2} {#3} }

\NewDocumentCommand \parencite*{ o o m } { \__csl_cite_year:nnn {#1} {#2} {#3} }

• Add this at Line #114:
  \cs_new:Npn \__csl_cite_year:nnn #1#2#3 { \seq_clear:N \l__csl_cite_keys_seq \seq_clear:N \l__csl_citation_items_seq \prop_clear:N \l__csl_citation_properties_prop \__csl_process_cite_input:nnn {#1} {#2} {#3} \__csl_process_citation_info:NN \l__csl_cite_keys_seq \l__csl_citation_items_seq \prop_put:Nnn \l__csl_citation_properties_prop { noteIndex } { 0 } \prop_put:Nnn \l__csl_citation_properties_prop { mode } { suppress-author} \bool_set_false:N \l__csl_note_bool \__csl_make_citation:N \l__csl_citation_info_prop }

End of suggestions.

I am not sure if the suggestions above will be successful to add the needed feature to provide compatibility for natbib command \citeyearpar and the equivalent biblatex command \parencite*. In particular, I don't know the actual behaviour of \l__csl_citation_properties_prop { mode } { suppress-author}: does it just print the year-only citation?

Thanks for providing such very practical package.

[zepinglee]

Thanks for you appreciation and the \citeyearpar and \parencite* commands are added in 19cb3f7.