refactor(core): add Proof_step

src/core/Sidekick_core.ml

@@ -25,6 +25,7 @@ end
 
 module Bvar = Sidekick_core_logic.Bvar
 module Lit = Lit
+module Proof_step = Proof_step
 module Proof_core = Proof_core
 module Proof_sat = Proof_sat
 module Proof_trace = Proof_trace

src/core/proof_step.ml

@@ -0,0 +1,3 @@
+type id = int32
+
+let pp = Fmt.int32

src/core/proof_term.ml

@@ -1,6 +1,6 @@
 open Sidekick_core_logic
 
-type step_id = int32
+type step_id = Proof_step.id
 type lit = Lit.t
 
 type t = {

src/core/proof_term.mli

@@ -4,7 +4,7 @@
 
 open Sidekick_core_logic
 
-type step_id = int32
+type step_id = Proof_step.id
 type lit = Lit.t
 
 type t = {

src/core/proof_trace.ml

@@ -1,5 +1,5 @@
 type lit = Lit.t
-type step_id = int32
+type step_id = Proof_step.id
 type proof_term = Proof_term.t
 
 module Step_vec = struct

src/core/proof_trace.mli

@@ -10,7 +10,7 @@ open Sidekick_core_logic
 
 type lit = Lit.t
 
-type step_id = Proof_term.step_id
+type step_id = Proof_step.id
 (** Identifier for a tracing step (like a unique ID for a clause previously
     added/proved) *)