Software Open Access
Matthieu Sozeau; Pierre-Marie Pédrot; Cyprien Mangin; Emilio Jesús Gallego Arias; Gaëtan Gilbert; Maxime Dénès; Robin Green; Hugo Herbelin; Enrico Tassi; Guillaume Claret; Siddharth; Anton Trunov; Joachim Breitner; Antonio Nikishaev; Jim Fehrle; SimonBoulier; Søren Nørbæk; Théo Zimmermann; Vincent Laporte; Yves Bertot
This is a new major release of Equations, working with Coq 8.13, 8.12 and 8.11. This version adds an improved syntax (less
;-separation), integration with the Coq-HoTT library (for Coq 8.13 only) and numerous bug fixes. It introduces minor breaking changes along with the following features:
Improved syntax for "concise" clauses separated by
|, at top-level or inside
We no longer require to separated them by
;. For example, the following definition is now accepted:
Equations foo : nat -> nat := | 0 => 1 | S n => S (foo n).
The old syntax is however still supported for backwards compatibility.
Require Import Equations.Equations. does not work anymore.
One has to use
Require Import Equations.Prop.Equations to load the plugin's default instance where equality is in
From Equations Require Import Equations is unaffected.
Require Import Equations.HoTT.Allto use the HoTT variant of the library compatible with the Coq HoTT library The plugin then reuses the definition of
pathsfrom the HoTT library and all its constructions are universe polymorphic. As for the HoTT library alone, coq must be passed the arguments
-noinit -indices-matterto use the library and plugin. The
coq-equationsopam package depends optionally on
coq-hott, so if
coq-hottis installed before it,
coq-equationswill automatically install the
HoTTlibrary variant in addition to the standard one.
#[tactic=tac]to set locally the default tactic to solve remaining holes. The goals on which the tactic applies are now always of the form
Γ |- τwhere Γ is the context where the hole was introduced and τ the expected type, even when using the
Obligationmachinery to solve them, resulting in a possible incompatibility if the obligation tactic treated the context differently than the conclusion. By default, the
program_simpltactic performs a
simplcall before introducing the hypotheses, so you might need to add a
simpl in *to your tactics.
#[derive(equations=yes,no, eliminator=yes|no)]can be used in place of the
(noeqns, noind)flags which are deprecated.
∗ #329: improved strengthening avoiding to abstract over recursive definitions which would not pass the guardness checker. This can simplify the produced terms, avoiding unnecessary "commutative cuts".
∗ #321: warn rather than error when using Equations? and no subgoals are left. This will leave a proof state with no subgoals, that must be closed using a
Defined (similarly to Coq's
#[refine] Instance command).
∗ #372, #194:
funelim applied to a partial application failing
∗ #354: support for building values in
∗ #353: name capture problem in presence of modules
∗ #335: provide an alias Equations Derive to not conflict with QuickChick's Derive
∗ #325: properly inline all Equations helper constants during Extraction