From 20d6f84b3b2ee9c80d8e1bce0191bf83433a101e Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Tue, 22 Nov 2016 10:43:41 +0100
Subject: [PATCH] use `char const*`

---
 include/mapnik/json/json_grammar_config.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/mapnik/json/json_grammar_config.hpp b/include/mapnik/json/json_grammar_config.hpp
index e1199e705..ba104f142 100644
--- a/include/mapnik/json/json_grammar_config.hpp
+++ b/include/mapnik/json/json_grammar_config.hpp
@@ -80,7 +80,7 @@ namespace grammar {
 
 namespace x3 = boost::spirit::x3;
 using space_type = x3::standard::space_type;
-using iterator_type = std::string::const_iterator;
+using iterator_type = char const*;
 using context_type = x3::with_context<keys_tag,
                                       std::reference_wrapper<keys_map> const,
                                       x3::phrase_parse_context<space_type>::type>::type;