The Coq Proof Assistant

# Library Ltac2.Ltac1

This module defines the Ltac2 FFI to Ltac1 code. Due to intricate semantics of the latter, the functions described here are voluntarily under-specified. Not for the casual user, handle with care and expect undefined behaviours otherwise.
Require Import Ltac2.Init Ltac2.Std Ltac2.Control.
Ltac2 Type t.
Dynamically-typed Ltac1 values.
Ltac2 @ external ref : ident list -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_ref".
Returns the Ltac1 definition with the given absolute name.
Ltac2 @ external run : t -> unit := "coq-core.plugins.ltac2_ltac1" "ltac1_run".
Runs an Ltac1 value, assuming it is a 'tactic', i.e. not returning anything.
Ltac2 @ external lambda : (t -> t) -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_lambda".
Embed an Ltac2 function into Ltac1 values. Contrarily to the ltac1:(...) quotation, this function allows both to capture an Ltac2 context inside the closure and to return an Ltac1 value. Returning values in Ltac1 is a intrepid endeavour prone to weird runtime semantics.
Ltac2 @ external apply : t -> t list -> (t -> unit) -> unit := "coq-core.plugins.ltac2_ltac1" "ltac1_apply".
Applies an Ltac1 value to a list of arguments, and provides the result in CPS style. It does **not** run the returned value.
Conversion functions
Ltac2 @ external of_int : int -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_int".
Converts an Ltac2 int into an Ltac1 value.
Ltac2 @ external to_int : t -> int option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_int".
Converts an Ltac1 int into an Ltac2 value.
Ltac2 @ external of_constr : constr -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_constr".
Converts an Ltac2 constr into an Ltac1 value.
Ltac2 @ external to_constr : t -> constr option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_constr".
Converts an Ltac1 constr (which includes terms created via open_constr) into an Ltac2 value.
preterm is called uconstr in Ltac1.
Ltac2 @ external of_preterm : preterm -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_preterm".
Ltac2 @ external to_preterm : t -> preterm option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_preterm".
Ltac2 @ external of_ident : ident -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_ident".
Ltac2 @ external to_ident : t -> ident option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_ident".
Ltac2 @ external of_list : t list -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_list".
Ltac2 @ external to_list : t -> t list option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_list".
Ltac2 @ external of_intro_pattern : intro_pattern -> t := "coq-core.plugins.ltac2_ltac1" "ltac1_of_intro_pattern".
Ltac2 @ external to_intro_pattern : t -> intro_pattern option := "coq-core.plugins.ltac2_ltac1" "ltac1_to_intro_pattern".
Debug information
Ltac2 @ external tag_name : t -> string := "coq-core.plugins.ltac2_ltac1" "ltac1_tag_name".
Name of the ltac1 value class the argument belongs to. Should be used only for error printing, typically "expected a constr but got a