From 43f5db1cc123defa74c0e14a3c4b6b319d2318a8 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 24 Sep 2020 08:05:47 +1000
Subject: [PATCH] view: operator bool should be explicit

Implicit bool tends to allow some unexpected behaviour when indexing
with incorrect types. eg, `view<int const*> a; a["foo"];`
---
 view.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/view.hpp b/view.hpp
index 1b719778..d5eab527 100644
--- a/view.hpp
+++ b/view.hpp
@@ -275,7 +275,7 @@ namespace cruft {
 
         ///--------------------------------------------------------------------
         /// Returns true if the view is not empty; ie, there is data remaining.
-        constexpr operator bool () const noexcept
+        explicit constexpr operator bool () const noexcept
         {
             return not empty ();
         }