From 5eb53b5bc8d765ed75e965f43f1084e18efc8790 Mon Sep 17 00:00:00 2001
From: Hugo Herbelin
Date: Sun, 27 Apr 2014 15:09:04 +0200
Subject: Adding a field ci_cstr_nargs to case_info and mind_consnrealargs to
 one_inductive_body so that when eta-expanding at "match" printing time we
 know if a let is part of the expected signature or part of the body.

This is an easy fix for bugs like #3293. Another fix could be to
enforce, as an invariant, or better syntactically, that
"match"/"Case"'s have the body of their branches expanded.
---
 checker/inductive.ml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'checker/inductive.ml')

diff --git a/checker/inductive.ml b/checker/inductive.ml
index 40a9bc316f..e6a24f705d 100644
--- a/checker/inductive.ml
+++ b/checker/inductive.ml
@@ -352,7 +352,8 @@ let check_case_info env indsp ci =
   if
     not (eq_ind indsp ci.ci_ind) ||
     (mib.mind_nparams <> ci.ci_npar) ||
-    (mip.mind_consnrealdecls <> ci.ci_cstr_ndecls)
+    (mip.mind_consnrealdecls <> ci.ci_cstr_ndecls) ||
+    (mip.mind_consnrealargs <> ci.ci_cstr_nargs)
   then raise (TypeError(env,WrongCaseInfo(indsp,ci)))
 
 (************************************************************************)
-- 
cgit v1.2.3