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https://issues.apache.org/jira/browse/MESOS-3214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Artem Harutyunyan updated MESOS-3214:
-------------------------------------
Sprint: Mesosphere Sprint 33, Mesosphere Sprint 34 (was: Mesosphere Sprint
33)
> Replace boost foreach with range-based for
> ------------------------------------------
>
> Key: MESOS-3214
> URL: https://issues.apache.org/jira/browse/MESOS-3214
> Project: Mesos
> Issue Type: Task
> Components: stout
> Reporter: Michael Park
> Assignee: Michael Park
> Labels: mesosphere
>
> It's desirable to replace the boost {{foreach}} macro with the C++11
> range-based {{for}}. This will help avoid some of the pitfalls of boost
> {{foreach}} such as dealing with types with commas in them, as well as
> improving compiler diagnostics by avoiding the macro expansion.
> One way to accomplish this is to replace the existing {{foreach (const Elem&
> elem, container)}} pattern with {{for (const Elem& elem : container)}}. We
> could support {{foreachkey}} and {{foreachvalue}} semantics via adaptors
> {{keys}} and {{values}} which would be used like this: {{for (const Key& key
> : keys(container))}}, {{for (const Value& value : values(container))}}. This
> leaves {{foreachpair}} which cannot be used with {{for}}. I think it would be
> desirable to support {{foreachpair}} for cases where the implicit unpacking
> is useful.
> Another approach is to keep {{foreach}}, {{foreachpair}}, {{foreachkey}} and
> {{foreachvalue}}, but simply implement them based on range-based {{for}}. For
> example, {{#define foreach(elem, container) for (elem : container)}}. While
> the consistency in the names is desirable, but unnecessary indirection of the
> macro definition is not.
> It's unclear to me which approach we would favor in Mesos, so please share
> your thoughts and preferences.
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