[Bug c++/44244] New: Provide -f flags to turn on individual C++0x features

[Bug c++/44244] New: Provide -f flags to turn on individual C++0x features

[jyasskin at gmail dot com]

Right now, gcc provides --std=c++0x to turn on all the features from C++0x that
it's implemented. However, it would be useful for organizations migrating to
C++0x to turn on one feature at a time as that feature becomes stable. For
example, we might turn on -fenable-c++0x-auto before -fenable-c++0x-lambdas.


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           Summary: Provide -f flags to turn on individual C++0x features
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jyasskin at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44244

[Bug c++/44244] Provide -f flags to turn on individual C++0x features

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2010-05-22 19:05 -------
I don't think this is a good idea as it means we have to support these options
forever.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44244

[Bug c++/44244] Provide -f flags to turn on individual C++0x features

[manu at gcc dot gnu dot org]

------- Comment #2 from manu at gcc dot gnu dot org  2010-06-04 15:50 -------
I am going to close this as WONTFIX for the following reasons:

* We do not want this because:
  a) We have too many options.
  b) These options would be of very limited and temporary use but we will have
to support them forever.
  c) c++0x features are spread all over the compiler -> this is hard to
implement properly as an after-thought.
  d) The additional checking will slow down the compiler for no significant
gain. We are too slow already.

* We have too many open PRs, so it is not worth it to keep this open just in
case.

Sorry about this but I hope you can understand.


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manu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu dot org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44244

[Bug c++/44244] Provide -f flags to turn on individual C++0x features

[jyasskin at gmail dot com]

------- Comment #3 from jyasskin at gmail dot com  2010-06-04 17:56 -------
Thanks for the prompt answers. I understand that you've picked the right
direction for gcc as a whole, even though it'll inconvenience me temporarily.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44244