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More testing for std::pair layout change 

* testsuite/20_util/pair/87822.cc: Test deeper nesting.

From-SVN: r265680
This commit is contained in:
Jonathan Wakely 2018-10-31 12:58:45 +00:00 committed by Jonathan Wakely
parent 8e82c473f5
commit d5e33619bf
2 changed files with 19 additions and 0 deletions
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2
libstdc++-v3/ChangeLog
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@ -1,5 +1,7 @@
2018-10-31 Jonathan Wakely <jwakely@redhat.com>
* testsuite/20_util/pair/87822.cc: Test deeper nesting.
PR libstdc++/87822
* include/bits/stl_pair.h (__pair_base): Change to class template.
(pair): Make base class type depend on template parameters.

17
libstdc++-v3/testsuite/20_util/pair/87822.cc
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@ -26,6 +26,7 @@ test01()
static_assert(sizeof(p) == (3 * sizeof(int)), "PR libstdc++/87822");
#endif
VERIFY( (void*)&p == (void*)&p.first );
VERIFY( (void*)&p == (void*)&p.first.first );
}
struct empty { };
@ -40,8 +41,24 @@ test02()
VERIFY( (void*)&p == (void*)&p.first );
}
void
test03()
{
typedef std::pair<int, int> int_pair;
typedef std::pair<int_pair, int_pair> int_pair_pair;
std::pair<int_pair_pair, int_pair_pair> p;
#if __cplusplus >= 201103L
static_assert(sizeof(int_pair_pair) == (2 * sizeof(int_pair)), "nested");
static_assert(sizeof(p) == (2 * sizeof(int_pair_pair)), "nested again");
#endif
VERIFY( (void*)&p == (void*)&p.first );
VERIFY( (void*)&p == (void*)&p.first.first );
VERIFY( (void*)&p == (void*)&p.first.first.first );
}
int main()
{
test01();
test02();
test03();
}