From c03cb2d434bc1fd04f39b041c7b657a770e49925 Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Thu, 15 Sep 2016 15:40:38 +0200
Subject: [PATCH] consistently return x3 grammars by const&

---
 include/mapnik/css_color_grammar_x3.hpp                | 2 +-
 include/mapnik/css_color_grammar_x3_def.hpp            | 2 +-
 include/mapnik/expression_grammar_x3.hpp               | 2 +-
 include/mapnik/expression_grammar_x3_def.hpp           | 2 +-
 include/mapnik/image_filter_grammar_x3.hpp             | 2 +-
 include/mapnik/image_filter_grammar_x3_def.hpp         | 2 +-
 include/mapnik/transform_expression_grammar_x3.hpp     | 2 +-
 include/mapnik/transform_expression_grammar_x3_def.hpp | 2 +-
 include/mapnik/wkt/wkt_grammar_x3.hpp                  | 2 +-
 include/mapnik/wkt/wkt_grammar_x3_def.hpp              | 2 +-
 10 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/mapnik/css_color_grammar_x3.hpp b/include/mapnik/css_color_grammar_x3.hpp
index 0719e44ec..54e022528 100644
--- a/include/mapnik/css_color_grammar_x3.hpp
+++ b/include/mapnik/css_color_grammar_x3.hpp
@@ -48,7 +48,7 @@ BOOST_SPIRIT_DECLARE(css_color_grammar_type);
 
 namespace mapnik
 {
-css_color_grammar::css_color_grammar_type color_grammar();
+css_color_grammar::css_color_grammar_type const& color_grammar();
 }
 
 
diff --git a/include/mapnik/css_color_grammar_x3_def.hpp b/include/mapnik/css_color_grammar_x3_def.hpp
index 2ad3cfa34..457f0d999 100644
--- a/include/mapnik/css_color_grammar_x3_def.hpp
+++ b/include/mapnik/css_color_grammar_x3_def.hpp
@@ -444,7 +444,7 @@ BOOST_SPIRIT_DEFINE(
 
 } // ns
 
-css_color_grammar::css_color_grammar_type color_grammar()
+css_color_grammar::css_color_grammar_type const& color_grammar()
 {
     return css_color_grammar::css_color;
 }
diff --git a/include/mapnik/expression_grammar_x3.hpp b/include/mapnik/expression_grammar_x3.hpp
index 889211939..46bdb2a84 100644
--- a/include/mapnik/expression_grammar_x3.hpp
+++ b/include/mapnik/expression_grammar_x3.hpp
@@ -44,7 +44,7 @@ BOOST_SPIRIT_DECLARE(expression_grammar_type);
 
 namespace mapnik
 {
-grammar::expression_grammar_type expression_grammar();
+grammar::expression_grammar_type const& expression_grammar();
 }
 
 
diff --git a/include/mapnik/expression_grammar_x3_def.hpp b/include/mapnik/expression_grammar_x3_def.hpp
index 0ef8fe960..d8ab45ade 100644
--- a/include/mapnik/expression_grammar_x3_def.hpp
+++ b/include/mapnik/expression_grammar_x3_def.hpp
@@ -424,7 +424,7 @@ namespace mapnik { namespace grammar {
 
 namespace mapnik
 {
-grammar::expression_grammar_type expression_grammar()
+grammar::expression_grammar_type const& expression_grammar()
 {
     return grammar::expression;
 }
diff --git a/include/mapnik/image_filter_grammar_x3.hpp b/include/mapnik/image_filter_grammar_x3.hpp
index ca452009e..8632c9122 100644
--- a/include/mapnik/image_filter_grammar_x3.hpp
+++ b/include/mapnik/image_filter_grammar_x3.hpp
@@ -49,7 +49,7 @@ BOOST_SPIRIT_DECLARE(image_filter_grammar_type);
 
 namespace mapnik {
 
-image_filter::image_filter_grammar_type image_filter_grammar();
+image_filter::image_filter_grammar_type const& image_filter_grammar();
 
 }
 
diff --git a/include/mapnik/image_filter_grammar_x3_def.hpp b/include/mapnik/image_filter_grammar_x3_def.hpp
index 2d680bea1..b40bfc8f9 100644
--- a/include/mapnik/image_filter_grammar_x3_def.hpp
+++ b/include/mapnik/image_filter_grammar_x3_def.hpp
@@ -251,7 +251,7 @@ BOOST_SPIRIT_DEFINE(
 
 } // image_filter
 
-image_filter::image_filter_grammar_type image_filter_grammar()
+image_filter::image_filter_grammar_type const& image_filter_grammar()
 {
     return image_filter::start;
 }
diff --git a/include/mapnik/transform_expression_grammar_x3.hpp b/include/mapnik/transform_expression_grammar_x3.hpp
index ccf480c22..77ff330d9 100644
--- a/include/mapnik/transform_expression_grammar_x3.hpp
+++ b/include/mapnik/transform_expression_grammar_x3.hpp
@@ -45,7 +45,7 @@ BOOST_SPIRIT_DECLARE(transform_expression_grammar_type);
 
 namespace mapnik
 {
-grammar::transform_expression_grammar_type transform_expression_grammar();
+grammar::transform_expression_grammar_type const& transform_expression_grammar();
 }
 
 #endif
diff --git a/include/mapnik/transform_expression_grammar_x3_def.hpp b/include/mapnik/transform_expression_grammar_x3_def.hpp
index 602f30aee..4af1e9481 100644
--- a/include/mapnik/transform_expression_grammar_x3_def.hpp
+++ b/include/mapnik/transform_expression_grammar_x3_def.hpp
@@ -175,7 +175,7 @@ namespace mapnik { namespace grammar {
 
 namespace mapnik
 {
-grammar::transform_expression_grammar_type transform_expression_grammar()
+grammar::transform_expression_grammar_type const& transform_expression_grammar()
 {
     return grammar::transform;
 }
diff --git a/include/mapnik/wkt/wkt_grammar_x3.hpp b/include/mapnik/wkt/wkt_grammar_x3.hpp
index 3fd969848..a0b6be0f0 100644
--- a/include/mapnik/wkt/wkt_grammar_x3.hpp
+++ b/include/mapnik/wkt/wkt_grammar_x3.hpp
@@ -42,7 +42,7 @@ BOOST_SPIRIT_DECLARE(wkt_grammar_type);
 
 namespace mapnik
 {
-grammar::wkt_grammar_type wkt_grammar();
+grammar::wkt_grammar_type const& wkt_grammar();
 }
 
 
diff --git a/include/mapnik/wkt/wkt_grammar_x3_def.hpp b/include/mapnik/wkt/wkt_grammar_x3_def.hpp
index 62fdb1ac0..b4bff5e38 100644
--- a/include/mapnik/wkt/wkt_grammar_x3_def.hpp
+++ b/include/mapnik/wkt/wkt_grammar_x3_def.hpp
@@ -121,7 +121,7 @@ BOOST_SPIRIT_DEFINE(
 
 namespace mapnik
 {
-grammar::wkt_grammar_type wkt_grammar()
+grammar::wkt_grammar_type const& wkt_grammar()
 {
     return grammar::wkt;
 }