[PATCH] Remove redundant accessors in hash tables

[Jonathan Wakely]

François,
I noticed that _Hash_code_base and _Hashtable_base have a number of
member functions which are overloaded for const and non-const:

    const _Equal&
    _M_eq() const { return _EqualEBO::_S_cget(*this); }

    _Equal&
    _M_eq() { return _EqualEBO::_S_get(*this); }

The non-const ones seem to be unnecessary. They're used in the _M_swap
member functions, but all other uses could (and probably should) call
the const overload to get a const reference to the function object.

If we make the _M_swap members use the EBO accessors directly then we
can get rid of the non-const accessors. That makes overload resolution
simpler for the compiler (as there's only one function to choose from)
and should result in slightly smaller code when inlining is not
enabled.

Do you see any problem with this patch?


-------------- next part --------------
A non-text attachment was scrubbed...
Name: patch.txt
Type: text/x-patch
Size: 3340 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20190515/75091d41/attachment.bin>