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include/mesos/resources.hpp
<https://reviews.apache.org/r/28089/#comment103426>

    I would suggest keeping the behavior symmetric to `std::vector` here. I'm 
guessing this was added due to the annoyance around initialization. The same 
issue existed for `std::vector` in `C++98` but it's been fixed with 
`std::initializer_list` constructors in `C++11`. We can implement one for 
`Resources` as well.
    
    ```cpp
    // C++98
    std::vector<int> v;
    v.push_back(1);
    v.push_back(2);
    
    // C++11
    std::vector<int> v = {1, 2};
    ```
    
    For `Resources`, it would look like:
    
    ```cpp
    Resources(std::initializer_list<Resource> resources) {
      foreach (const Resource& resource, resources) {
        *this += resource;
      }
    }
    ```
    
    Then we can do the following transformation:
    
    ```cpp
    // Before
    Resource cpus1 = Resources::parse("cpus", "1", "role1").get();
    Resources r1;
    r1 += cpus1;
    
    // After
    Resources r1 = { Resources::parse("cpus", "1", "role1").get() };
    ```



src/common/resources.cpp
<https://reviews.apache.org/r/28089/#comment103419>

    How about using `combinable` here?
    `if (!combinable(left, right)) { return false; }`



src/common/resources.cpp
<https://reviews.apache.org/r/28089/#comment103420>

    Ditto here, use `combinable`?



src/common/resources.cpp
<https://reviews.apache.org/r/28089/#comment103424>

    This variable isn't necessary right?



src/common/resources.cpp
<https://reviews.apache.org/r/28089/#comment103423>

    Hm, just curious. Do we need the `Clear` here even if we're now doing 
`CopyFrom`?


- Michael Park


On Nov. 15, 2014, 6:56 a.m., Jie Yu wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/28089/
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> 
> (Updated Nov. 15, 2014, 6:56 a.m.)
> 
> 
> Review request for mesos, Ben Mahler and Vinod Kone.
> 
> 
> Bugs: MESOS-1974
>     https://issues.apache.org/jira/browse/MESOS-1974
> 
> 
> Repository: mesos-git
> 
> 
> Description
> -------
> 
> Hide operators for Resource object. Split "matches" to handle future first 
> class infos.
> 
> 
> Diffs
> -----
> 
>   include/mesos/resources.hpp 0e37170 
>   src/common/resources.cpp e9a0c85 
>   src/tests/resources_tests.cpp 3e50889 
> 
> Diff: https://reviews.apache.org/r/28089/diff/
> 
> 
> Testing
> -------
> 
> make check
> 
> 
> Thanks,
> 
> Jie Yu
> 
>

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