From 9d4da1ad2e90aa5ae325a92783abfcee286fa773 Mon Sep 17 00:00:00 2001
From: David Chappelle <dchappelle@topologyinc.com>
Date: Fri, 15 May 2015 16:21:54 -0400
Subject: [PATCH] Object conversions return the specific type that was
 converted.

This allows us to easily make function calls that have parameters that are dependent
upon converting from msgpack objects to concrete types. For example:

    void process_args(std::tuple<int,std::string>& args)
    {
        ...
    }

    process_args(obj.convert(std::make_tuple(100,"hello")))

You can get similar behavior by using obj.as<...>() but its performance is highly
dependent upon the specific compiler and whether or not r-value references are
supported.
---
 include/msgpack/object.hpp     | 6 ++++--
 include/msgpack/object_fwd.hpp | 4 ++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/msgpack/object.hpp b/include/msgpack/object.hpp
index 03dd8689..ee207122 100644
--- a/include/msgpack/object.hpp
+++ b/include/msgpack/object.hpp
@@ -386,15 +386,17 @@ inline msgpack::object::implicit_type object::convert() const
 }
 
 template <typename T>
-inline void object::convert(T& v) const
+inline T& object::convert(T& v) const
 {
     msgpack::operator>>(*this, v);
+    return v;
 }
 
 template <typename T>
-inline void object::convert(T* v) const
+inline T* object::convert(T* v) const
 {
     convert(*v);
+    return v;
 }
 
 template <typename T>
diff --git a/include/msgpack/object_fwd.hpp b/include/msgpack/object_fwd.hpp
index 21483bc4..ffcc7db5 100644
--- a/include/msgpack/object_fwd.hpp
+++ b/include/msgpack/object_fwd.hpp
@@ -106,9 +106,9 @@ struct object {
     T as() const;
 
     template <typename T>
-    void convert(T& v) const;
+    T& convert(T& v) const;
     template <typename T>
-    void convert(T* v) const;
+    T* convert(T* v) const;
 
     object();