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The addition to the test suite showcases the usage.
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Also adding spaces around ":=" and ":" when printed as "(x : t := c)".
Example:
Check fun y => let x : True := I in fun z => z+y=0.
(* λ (y : nat) (x : True := I) (z : nat), z + y = 0
: nat → nat → Prop *)
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This is a patch fulfilling the relevant remark of Maxime that an
explicit information at the ML type level would be better than "cast
surgery" to carry the optional type of a let-in.
There are a very few semantic changes.
- a "(x:t:=c)" in a block of binders is now written in the more
standard way "(x:=c:t)"
- in notations, the type of a let-in is not displayed if not
explicitly asked so.
See discussion at PR #417 for more information.
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RawLocal -> CLocal
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Previously, tags were associated to terminal styles, which doesn't make
sense on terminal-free pretty printing scenarios.
This commit moves tag interpretation to the toplevel terminal handling
module `Topfmt`.
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This is what has always been used, so it doesn't represent a functional
change.
This is just a preliminary patch, but many more possibilities could be
done wrt tags.
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Applications of it were not clear/unproven, it made printers more
complex (as they needed to be functors) and as it lacked examples it
confused some people.
The printers now tag unconditionally, it is up to the backends to
interpreted the tags.
Tagging (and indeed the notion of rich document) should be reworked in
a follow-up patch, so they are in sync, but this is a first step.
Tested, test-suite passes.
Notes:
- We remove the `Richprinter` module. It was only used in the
`annotate` IDE protocol call, its output was identical to the normal
printer (or even inconsistent if taggers were not kept manually in
sync).
- Note that Richpp didn't need a single change. In particular, its
main API entry point `Richpp.rich_pp` is not used by anyone.
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Given the current style in flags.mli no reason to have a function.
A deeper question is why a global flag is needed, in particular the use
in `interp/constrextern.ml` seems strange, the condition in the lexer
should be looked at and I'm not sure about `printing/`.
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done by the Ppcmd_comment token) and so that lexing/parsing
side-effects are collected at the same place, i.e. in CLexer.
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We only tag the non-whitespace substrings, rather than the whole terminal token.
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- typo in notation_ops.ml
- factorization of patterns in ppconstr.ml
- update of test-suite
- printing of cast of a binding pattern if in mode "printing all"
The question of whether or not to print the type of a binding pattern
by default seems open to me.
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Supporting accordingly printing of sequences of binders including binding
patterns.
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(In agreement with Daniel.)
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module)
For the moment, there is an Error module in compilers-lib/ocamlbytecomp.cm(x)a
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Cf CHANGES for details.
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This reverts commit dbe29599c2e9bf49368c7a92fe00259aa9cbbe15.
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This reverts commit 9e038688af8f7f054c1c2acdb2fe65d78cccdd81.
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This reverts commit cbb917476e3920641352c108ec9ffaf6d1682217.
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Notation "## c" := (S c) (at level 0, c at level 100).
which break the stratification of precedences. This works for the case
of infix or suffix operators which occur in only one grammar rule,
such as +, *, etc. This solves the "constr" part of #3709, even though
this example is artificial.
The fix is not complete. It puts extra parenthesese even when it is
end of sentence, as in
Notation "# c % d" := (c+d) (at level 3).
Check fun x => # ## x % ## (x * 2).
(* fun x : nat => # ## x % (## x * 2) *)
The fix could be improved by not always using 100 for the printing
level of "## c", but 100 only when not the end of the sentence.
The fix does not solve the general problem with symbols occurring in
more than one rule, as e.g. in:
Notation "# c % d" := (c+d) (at level 1).
Notation "## c" := (S c) (at level 0, c at level 5).
Check fun x => # ## x % 0.
(* Parentheses are necessary only if "0 % 0" is also parsable *)
I don't see in this case what better approach to follow than
restarting the parser to check reversibility of the printing.
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I have removed the second field of the "Constrexpr.CRecord" variant
because once it was set to "None"
it never changed to anything else.
It was just carried and copied around.
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Note: they do not even seem to have a debugging purpose, so better remove
them before they bitrot.
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For instance, calling only Id.print is faster than calling both str and
Id.to_string, since the latter performs a copy. It also makes the code a
bit simpler to read.
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For instance, #4447 is now printed:
λ Ca Da : ℕAlg,
let (ℕ, ℕ0) := (Ca, Da) in
let (C, p) := ℕ in
let (c₀, cs) := p in
let (D, p0) := ℕ0 in
let (d₀, ds) := p0 in
{h : C → D & ((h c₀ = d₀) * (∀ c : C, h (cs c) = ds (h c)))%type}
: ℕAlg → ℕAlg → Type
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This option disallows "declare at first use" semantics for universe
variables (in @{}), forcing the declaration of _all_ universes appearing
in a definition when introducing it with syntax Definition/Inductive
foo@{i j k} .. The bound universes at the end of a definition/inductive
must be exactly those ones, no extras allowed currently.
Test-suite files using the old semantics just disable the option.
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Fixes bug 3936
This closes #73
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They should be rather sensible, but de gustibus & coloribus...
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reference" and "simpl pattern" in the code (maybe we should have
merged them instead, but I finally decided to enforce their
difference, even if some compatibility is to be preversed - the idea
is that at some time "simpl reference" would only call a weak-head
simpl (or eventually cbn), leading e.g. to reduce 2+n into S(1+n)
rather than S(S(n)) which could be useful for better using induction
hypotheses.
In the process we also implement the following:
- 'simpl "+"' is accepted to reduce all applicative subterms whose
head symbol is written "+" (in the toplevel scope); idem for
vm_compute and native_compute
- 'simpl reference' works even if reference has maximally inserted
implicit arguments (this solves the "simpl fst" incompatibility)
- compatibility of ltac expressions referring to vm_compute and
native_compute with functor application should now work (i.e.
vm_compute and native_compute are now taken into account in
tacsubst.ml)
- for compatibility, "simpl eq" (assuming no maximal implicit args in
eq) or "simpl @eq" to mean "simpl (eq _ _)" are still allowed.
By the way, is "mul" on nat defined optimally? "3*n" simplifies to
"n+(n+(n+0))". Are there some advantages of this compared to have it
simplified to "n+n+n" (i.e. to "(n+n)+n").
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