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Fix #13086.
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This makes the invariants in the code clearer, and also highlight this is
only required to implement template polymorphic inductive types.
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Add headers to a few files which were missing them.
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This could have been at the root of strange behaviours (read unsoundness).
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For an inductive block to be template, all its components must also
be. This is probably fixing a few soundness bugs in the process, but I
do not want to think too much about it.
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We also factorize a few checks by returning an option when looking for
a potentially template universe.
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Reviewed-by: SkySkimmer
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This was the only part in the kernel that really relied on the contents
of the Monomorphic node.
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Not sure if it's possible to see it without a plugin.
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preparation for direct discharge
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~strict flag
Ack-by: SkySkimmer
Ack-by: ejgallego
Reviewed-by: ppedrot
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It gets thrown away if the inductive is declared in a section anyway,
and there is no user syntax to specify it.
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One should generally push contexts with ~strict:true when the context is a monomorphic one (all univs > Set) except for template polymorphic inductives (>= Prop) and ~strict:false for universe polymorphic ones (>= Set). Includes fixes from Gaëtan's and Emilio's reviews
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and do not run template_candidate in the upper layers when the
template attribute is given.
This means we can use an over-approximation in the upper layer
implementation of template_candidate (returning false even in cases
which the kernel may accept) if we ever want to.
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Using the parameter universes in the constructor causes implicit
equality constraints, so those universes may not be template
polymorphic.
A couple types in the stdlib were erroneously marked template, which
is now detected. Removing the marking doesn't actually change
behaviour though.
Also fixes #10504.
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This could be Prop (for compat with usual Coq), Set (for HoTT),
or actually an arbitrary "i".
Take lower bound of universes into account in pretyping/engine
Reinstate proper elaboration of SProp <= l constraints:
replacing is_small with equality with lbound is _not_ semantics preserving!
lbound = Set
Elaborate template polymorphic inductives with lower bound Prop
This will make more constraints explicit
Check univ constraints with Prop as lower bound for template inductives
Restrict template polymorphic universes to those not bounded from below
Fixes #9294
fix suggested by Matthieu
Try second fix suggested by Matthieu
Take care of modifying elaboration for record declarations as well.
Rebase and export functions for debug
Remove exported functions used while debugging
Add a new typing flag "check_template" and option "-no-template-checl"
This parameterizes the new criterion on template polymorphic inductives
to allow bypassing it (necessary for backward compatibility).
Update checker to the new typing flags structure
Switch on the new template_check flag to allow old unsafe behavior in
indTyping.
This is the only change of code really impacting the kernel, together
with the commit implementing unbounded from below and parameterization
by the lower bound on universes.
Add deprecated option `Unset Template Check` allowing to make proof
scripts work with both 8.9 and 8.10 for a while
Fix `Template Check` option name and test it
Add `Unset Template Check` to Coq89.v
Cooking of inductives and template-check tests
Cleanup test-suite file for template check / universes(template) flags
cookind tests
Move test of `Unset Template Check` to the failure/ dir, but comment it
for now
Template test-suite test explanation
Overlays for PR 9918
Overlay for paramcoq
Add overlay for fiat_parsers (-no-template-check)
Add overlay for fiat_crypto_legacy
Update fiat-crypto legacy overlay
Now it points at the version that I plan on merging; I am hoping that doing this will guard against mistakes by adding an extra check that the target tested by Coq's CI on this branch works with the change I made.
Remove overlay that should no longer be necessary
The setting in the compat file should handle it
Remove now-merged fiat-crypto-legacy overlay
Update `Print Assumptions` to reflect the typing flag for template checking
Fix About and Print Assumptions for template poly, giving info on which
variables are actually polymorphic
Fix pretty printing to print global universe levels properly
Fix printing of template polymorphic universes
Fix pretty printing for template polymorphism on no universe
Fix interaction of template check and universes(template) flag
Fix indTyping to really check if there is any point in polymorphism: the
conclusion sort should be parameterized over at least one local universe
Indtyping fixes for template polymorphic Props
Allow explicit template polymorphism again
Adapt to new indTyping interface
Handle the case of template-polymorphic on no universes
correctly (morally Type0m univ represented as Prop).
Fix check of meaningfullness of template polymorphism in the kernel.
It is now done w.r.t the min_univ, the minimal universe inferred for the
inductive/record type, independently of the user-written annotation
which must only be larger than min_univ. This preserves compatibility
with UniMath and template-polymorphism as it has been implemented up-to
now.
Comment on identity non-template-polymorphism
Remove incorrect universes(template) attributes from ssr
simpl_fun can be meaningfully template-poly, as well as
pred_key (although the use is debatable: it could just
as well be in Prop).
Move `fun_of_simpl` coercion declaration out of section to respect
uniform inheritance
Remove incorrect uses of #[universes(template)] from the stdlib
Extraction of micromega changes due to moving an ind decl out of a section
Remove incorrect uses of #[universes(template)] from plugins
Fix test-suite files, removing incorrect #[universes(template)] attributes
Remove incorrect #[universes(template)] attributes in test-suite
Fix test-suite
Remove overlays as they have been merged upstream.
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Prevent errors when under annotating binders.
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For nonsquashed:
Either
- 0 constructors
- primitive record
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Kernel should be mostly correct, higher levels do random stuff at
times.
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Note currently it's impossible to define inductives in SProp because
indtypes.ml and the pretyper aren't fully plugged.
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I think the usage looks cleaner this way.
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We split into smaller functions, use more specific types for universe
manipulation, and try to limit how much of the big tuple gets passed
to subroutines.
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This is strictly code movement.
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