From 96e11c59370df5070d0385454ce22329d208c9d8 Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Sat, 7 Feb 2009 17:45:57 -0400
Subject: [PATCH] Don't allow regexps to be evaluated in a boolean context.

---
 src/value.cc | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/value.cc b/src/value.cc
index c7cc77c8..4b9f5756 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -211,18 +211,16 @@ value_t::operator bool() const
     return as_balance_pair();
   case STRING:
     return ! as_string().empty();
-  case MASK:
-    return ! as_mask().empty();
   case SEQUENCE:
     return ! as_sequence().empty();
   case POINTER:
     return ! as_any_pointer().empty();
   default:
-    assert(false);
     break;
   }
-  assert(false);
-  return 0;
+
+  throw_(value_error, "Cannot determine truth of " << label());
+  return false;
 }
 
 bool value_t::to_boolean() const