From 8a807b2ffc27b84c9ea0ffe9f22b164ade24badb Mon Sep 17 00:00:00 2001
From: Emilio Jesus Gallego Arias
Date: Wed, 15 Mar 2017 20:48:10 +0100
Subject: [cleanup] Unify all calls to the error function.

This is the continuation of #244, we now deprecate `CErrors.error`,
the single entry point in Coq is `user_err`.

The rationale is to allow for easier grepping, and to ease a future
cleanup of error messages. In particular, we would like to
systematically classify all error messages raised by Coq and be sure
they are properly documented.

We restore the two functions removed in #244 to improve compatibility,
but mark them deprecated.
---
 printing/printer.ml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'printing/printer.ml')

diff --git a/printing/printer.ml b/printing/printer.ml
index d4f7afb38c..ebe68680fb 100644
--- a/printing/printer.ml
+++ b/printing/printer.ml
@@ -566,7 +566,7 @@ let pr_selected_subgoal name sigma g =
 
 let default_pr_subgoal n sigma =
   let rec prrec p = function
-    | [] -> error "No such goal."
+    | [] -> user_err Pp.(str "No such goal.")
     | g::rest ->
 	if Int.equal p 1 then
           pr_selected_subgoal (int n) sigma g
@@ -828,7 +828,7 @@ let pr_goal_by_id id =
     Proof.in_proof p (fun sigma ->
       let g = Evd.evar_key id sigma in
       pr_selected_subgoal (pr_id id) sigma g)
-  with Not_found -> error "No such goal."
+  with Not_found -> user_err Pp.(str "No such goal.")
 
 let pr_goal_by_uid uid =
   let p = Proof_global.give_me_the_proof () in
@@ -839,7 +839,7 @@ let pr_goal_by_uid uid =
   in
   try
     Proof.in_proof p (fun sigma -> pr {it=g;sigma=sigma;})
-  with Not_found -> error "Invalid goal identifier."
+  with Not_found -> user_err Pp.(str "Invalid goal identifier.")
 
 (* Elementary tactics *)
 
-- 
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