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Object conversions return the specific type that was converted.

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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.
This commit is contained in:
David Chappelle 2015-05-15 16:21:54 -04:00
parent 68e270b029
commit 9d4da1ad2e
2 changed files with 6 additions and 4 deletions
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6
include/msgpack/object.hpp
View File

@ -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>

4
include/msgpack/object_fwd.hpp
View File

@ -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();