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| author | Jonathan Wakely <jwakely@redhat.com> | 2018-10-31 12:29:02 +0000 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-10-31 12:29:02 +0000 |
| commit | 0db78d0a5e95572841a98754dca6c3513a3a334d (patch) | |
| tree | 4f471c309277f6fc04dbe8187e6a65c5c91687f5 /gcc | |
| parent | ef976be1a23a5171082cf1a569d00573013a175c (diff) | |
| download | gcc-0db78d0a5e95572841a98754dca6c3513a3a334d.zip gcc-0db78d0a5e95572841a98754dca6c3513a3a334d.tar.gz gcc-0db78d0a5e95572841a98754dca6c3513a3a334d.tar.bz2 | |
PR libstdc++/87822 fix layout change for nested std::pair
The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.
The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.
PR libstdc++/87822
* include/bits/stl_pair.h (__pair_base): Change to class template.
(pair): Make base class type depend on template parameters.
* testsuite/20_util/pair/87822.cc: New test.
From-SVN: r265678
Diffstat (limited to 'gcc')
0 files changed, 0 insertions, 0 deletions