[llvm-bugs] [Bug 27397] New: Deprecate and remove C++03 support for INVOKE and function.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27397

            Bug ID: 27397
           Summary: Deprecate and remove C++03 support for INVOKE and
                    function.
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: eric at efcs.ca
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com
    Classification: Unclassified

Currently <functional> provides a large number of C++11 features as extensions
in C++03. The largest being INVOKE and std::function.

Supporting INVOKE in a non-variadic environment is almost impossible and it
leads to a very poor QoI for the features that depend on it. As the INVOKE spec
changes the C++03 implementation will diverge and make it harder to test.

I would like to remove the C++03 implementation of INVOKE and the features that
depend on it. Including:

- function
- reference_wrapper
- mem_fn

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