From c5a1615301d70e67078a21aeea3e6c0f2bfe0188 Mon Sep 17 00:00:00 2001
From: Vinnie Falco <vinnie.falco@gmail.com>
Date: Sun, 29 Oct 2017 06:45:33 -0700
Subject: [PATCH] basic_fields returns const values

---
 CHANGELOG.md                             |  6 ++++++
 include/boost/beast/http/fields.hpp      | 14 +++++++-------
 include/boost/beast/http/impl/fields.ipp | 14 +++++++-------
 3 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5eb4103..32d1c2eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+Version 131:
+
+* basic_fields returns const values
+
+--------------------------------------------------------------------------------
+
 Version 130:
 
 * Tidy up fallthrough warning
diff --git a/include/boost/beast/http/fields.hpp b/include/boost/beast/http/fields.hpp
index 3ce63723..cf9945fd 100644
--- a/include/boost/beast/http/fields.hpp
+++ b/include/boost/beast/http/fields.hpp
@@ -93,15 +93,15 @@ public:
         value_type& operator=(value_type const&) = delete;
 
         /// Returns the field enum, which can be @ref field::unknown
-        field
+        field const
         name() const;
 
         /// Returns the field name as a string
-        string_view
+        string_view const
         name_string() const;
 
         /// Returns the value of the field
-        string_view
+        string_view const
         value() const;
     };
 
@@ -280,7 +280,7 @@ public:
 
         @throws std::out_of_range if the field is not found.
     */
-    string_view
+    string_view const
     at(field name) const;
 
     /** Returns the value for a field, or throws an exception.
@@ -294,7 +294,7 @@ public:
 
         @throws std::out_of_range if the field is not found.
     */
-    string_view
+    string_view const
     at(string_view name) const;
 
     /** Returns the value for a field, or `""` if it does not exist.
@@ -304,7 +304,7 @@ public:
 
         @param name The name of the field.
     */
-    string_view
+    string_view const
     operator[](field name) const;
 
     /** Returns the value for a case-insensitive matching header, or `""` if it does not exist.
@@ -314,7 +314,7 @@ public:
 
         @param name The name of the field.
     */
-    string_view
+    string_view const
     operator[](string_view name) const;
 
     //--------------------------------------------------------------------------
diff --git a/include/boost/beast/http/impl/fields.ipp b/include/boost/beast/http/impl/fields.ipp
index dd712d8a..f787ee92 100644
--- a/include/boost/beast/http/impl/fields.ipp
+++ b/include/boost/beast/http/impl/fields.ipp
@@ -291,7 +291,7 @@ value_type(field name,
 
 template<class Allocator>
 inline
-field
+field const
 basic_fields<Allocator>::
 value_type::
 name() const
@@ -301,7 +301,7 @@ name() const
 
 template<class Allocator>
 inline
-string_view
+string_view const
 basic_fields<Allocator>::
 value_type::
 name_string() const
@@ -313,7 +313,7 @@ name_string() const
 
 template<class Allocator>
 inline
-string_view
+string_view const
 basic_fields<Allocator>::
 value_type::
 value() const
@@ -465,7 +465,7 @@ operator=(basic_fields<OtherAlloc> const& other) ->
 //------------------------------------------------------------------------------
 
 template<class Allocator>
-string_view
+string_view const
 basic_fields<Allocator>::
 at(field name) const
 {
@@ -478,7 +478,7 @@ at(field name) const
 }
 
 template<class Allocator>
-string_view
+string_view const
 basic_fields<Allocator>::
 at(string_view name) const
 {
@@ -490,7 +490,7 @@ at(string_view name) const
 }
 
 template<class Allocator>
-string_view
+string_view const
 basic_fields<Allocator>::
 operator[](field name) const
 {
@@ -502,7 +502,7 @@ operator[](field name) const
 }
 
 template<class Allocator>
-string_view
+string_view const
 basic_fields<Allocator>::
 operator[](string_view name) const
 {