feat(simplify): delta[f g] forces unfolding of listed operators - #1108
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bgregoir
approved these changes
Sep 3, 2026
`simplify delta` unfolds every transparent definition and `simplify f g`
unfolds only `f` and `g`, but nothing could express both at once: full
delta plus forced unfolding of operators declared `[opaque]`. The
grammar had no production for it, and `pdelta : pqsymbol list option`
could not represent it (`None` = all transparent, `Some l` = only `l`).
`pdelta` is now a record `{ pd_all; pd_ops }`. `delta[f g]` sets both,
accepted after `simplify`/`cbv` and in the keyword-less form, and
composes with a trailing `hint` clause. Listed operators reduce with
`Force`, the rest with `IfTransparent` when `pd_all` is set and
`IfApplied` otherwise. Existing spellings keep their meaning.
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simplify deltaunfolds every transparent definition andsimplify f gunfolds only
fandg, but nothing could express both at once: fulldelta plus forced unfolding of operators declared
[opaque]. Thegrammar had no production for it, and
pdelta : pqsymbol list optioncould not represent it (
None= all transparent,Some l= onlyl).pdeltais now a record{ pd_all; pd_ops }.delta[f g]sets both,accepted after
simplify/cbvand in the keyword-less form, andcomposes with a trailing
hintclause. Listed operators reduce withForce, the rest withIfTransparentwhenpd_allis set andIfAppliedotherwise. Existing spellings keep their meaning.