Library Ltac2.Constr
Return the type of a term
Ltac2 @ external equal : constr -> constr -> bool := "ltac2" "constr_equal".
Strict syntactic equality: only up to α-conversion and evar expansion
Ltac2 Type relevance := [ Relevant | Irrelevant ].
Ltac2 Type 'a binder_annot := { binder_name : 'a; binder_relevance : relevance }.
Module Unsafe.
Low-level access to kernel terms. Use with care!
Ltac2 Type case.
Ltac2 Type kind := [
| Rel (int)
| Var (ident)
| Meta (meta)
| Evar (evar, constr array)
| Sort (sort)
| Cast (constr, cast, constr)
| Prod (ident option binder_annot, constr, constr)
| Lambda (ident option binder_annot, constr, constr)
| LetIn (ident option binder_annot, constr, constr, constr)
| App (constr, constr array)
| Constant (constant, instance)
| Ind (inductive, instance)
| Constructor (constructor, instance)
| Case (case, constr, constr, constr array)
| Fix (int array, int, ident option binder_annot array, constr array, constr array)
| CoFix (int, ident option binder_annot array, constr array, constr array)
| Proj (projection, constr)
| Uint63 (uint63)
| Float (float)
].
Ltac2 @ external kind : constr -> kind := "ltac2" "constr_kind".
Ltac2 @ external make : kind -> constr := "ltac2" "constr_make".
Ltac2 @ external check : constr -> constr result := "ltac2" "constr_check".
Checks that a constr generated by unsafe means is indeed safe in the
current environment, and returns it, or the error otherwise. Panics if
not focused.
Ltac2 @ external substnl : constr list -> int -> constr -> constr := "ltac2" "constr_substnl".
substnl [r₁;...;rₙ] k c substitutes in parallel Rel(k+1); ...; Rel(k+n) with
r₁;...;rₙ in c.
Ltac2 @ external closenl : ident list -> int -> constr -> constr := "ltac2" "constr_closenl".
closenl [x₁;...;xₙ] k c abstracts over variables x₁;...;xₙ and replaces them with
Rel(k); ...; Rel(k+n-1) in c. If two names are identical, the one of least index is kept.
Ltac2 @ external case : inductive -> case := "ltac2" "constr_case".
Generate the case information for a given inductive type.
Ltac2 @ external constructor : inductive -> int -> constructor := "ltac2" "constr_constructor".
Generate the i-th constructor for a given inductive type. Indexing starts
at 0. Panics if there is no such constructor.
End Unsafe.
Ltac2 @ external in_context : ident -> constr -> (unit -> unit) -> constr := "ltac2" "constr_in_context".
On a focused goal Γ ⊢ A, in_context id c tac evaluates tac in a
focused goal Γ, id : c ⊢ ?X and returns fun (id : c) => t where t is
the proof built by the tactic.
Ltac2 @ external pretype : preterm -> constr := "ltac2" "constr_pretype".
Pretype the provided preterm. Assumes the goal to be focussed.