Community Wishlist Survey 2019/Editing/Wikitext substitutions should work in ref and gallery blocks

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Wikitext substitutions should work in ref and gallery blocks

Problem: Links ending in |]], substitutions with {{subst: and tilde-timestamps (~~~~~) don't behave as expected within <ref> and <gallery> blocks. (Amongst others.)
Who would benefit: Article wikitext editors.
Proposed solution: Resolve that substitution and pipe tricks work inside other mediawiki tag extensions
More comments: More generally speaking: common wikitext substitutions that editors would expect to work in all reader-visible places, do not work in some contexts.
mw:Extension:Cite has not evolved with other components of wikiediting. Substitution (subst:) and pipe tricks from inside custom tags like <ref> fail unless one pushes with more complicated use of {{#tag:}}. Such use can be problematic due to the misinterpretation of | and {{!}}. To note that the identified problem also applies to use of <poem>.
Phabricator tickets: T4700: Pre-save transform skips extensions using wikitext (gallery, references, footnotes, Cite, status indicators, pipe trick, subst, signatures)
Proposer: bdijkstra (talk) 09:27, 5 November 2018 (UTC)[reply]

Gallery, tables, templates, pictures, etc should be fully functional for formatted texts. RIT RAJARSHI (talk) 18:52, 21 November 2018 (UTC)[reply]

Support Liuxinyu970226 (talk) 08:09, 17 November 2018 (UTC)[reply]
Support Any chance? JAn Dudík (talk) 20:15, 17 November 2018 (UTC)[reply]
Support Viswaprabha (talk) 23:20, 18 November 2018 (UTC)[reply]
Support Ahecht (TALK
PAGE) 16:31, 19 November 2018 (UTC)[reply]
Support Novak Watchmen (talk) 00:27, 21 November 2018 (UTC)[reply]
Support Gallery, tables, templates, pictures, etc should be fully functional for formatted texts. RIT RAJARSHI (talk) 18:52, 21 November 2018 (UTC)[reply]
Support Wargo (talk) 23:33, 22 November 2018 (UTC)[reply]
Support Helder 13:10, 25 November 2018 (UTC)[reply]
Support Dvorapa (talk) 13:06, 27 November 2018 (UTC)[reply]
Support XanonymusX (talk) 17:00, 29 November 2018 (UTC)[reply]