[Bug c++/63871] New: -Weffc++ does not understand type deduction for return types

[Bug c++/63871] New: -Weffc++ does not understand type deduction for return types

[david at doublewise dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63871

            Bug ID: 63871
           Summary: -Weffc++ does not understand type deduction for return
                    types
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: david at doublewise dot net

Source file:


class C {};
auto && operator++(C & c) {
    return c;
}

int main() {
}



gcc-4.9 source/main.cpp -Weffc++ -std=c++1y
source/main.cpp:112:25: warning: prefix ‘auto&& operator++(C&)’ should return
‘C&’ [-Weffc++]
 auto && operator++(C & c) {



I get the same error with the return type specified as `auto &` or
`decltype(auto)`.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/16166] -Weffc++ finer granularity
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id\x16166

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 63871 has been marked as a duplicate of this bug. ***

[Bug c++/63871] -Weffc++ does not understand type deduction for return types

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63871

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
-Weffc++ hasn't been updated or maintained in years, it still uses the rules
form the 1st edition of Effective C++ ... I wish people would stop using it.

PR 16166 is the place where -Weffc++ PRs go to die.

*** This bug has been marked as a duplicate of bug 16166 ***