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constainer's Issues

GCC ICEs on ChunkPool testcase 

constexpr auto d() {
    ChunkPool<int, 17> c;
    int* ptr = c.grab();
    assert( c.used() == 1 );
    c.free(ptr);
    return 0;
}
static_assert( d() == 0 );

Leads to an ICE with trunk 20150813; has been reported as #66292 and reduced to #66460.

StableVector - access to temporary whose lifetime has ended

This issue occurs in e.g. the following scenario:

constexpr auto f() {return StableVector<int, ChunkPool<int, 10>>{1};}
static_assert( f()[0] );

Clang's error message:

….cxx:4:16: error: static_assert expression is not an integral constant expression
static_assert( f()[0] );
               ^~~~~~
….cxx:4:16: note: read of temporary whose lifetime has ended
….cxx:3:28: note: temporary created here
constexpr auto f() {return StableVector<int, ChunkPool<int, 10>>{1};}
                           ^

Whether this is a bug or not isn't entirely clear, but the former is probably the case, as e.g. AddressSanitizer doesn't show anything.

GCC fails Array comparison testcase 

constexpr Array<int, 10> a {{1, 2, 3, 4, 5}};
constexpr Array<int, 10> a2{{1, 2, 3, 4, 5}};
static_assert( a == a2 );

Fails with GCC trunk 20150813:

Constainer/Testing.cxx:23:1: error: non-constant condition for static assertion
 static_assert( a == a2 );
 ^
In file included from Constainer/impl/../Array.hxx:7:0,
                 from Constainer/impl/BasicVector.hxx:7,
                 from Constainer/String.hxx:8,
                 from Constainer/Parser.hxx:7,
                 from Constainer/Testing.cxx:7:
Constainer/Testing.cxx:23:18:   in constexpr expansion of ‘Constainer::operator==<int, 10ul, int, 10ul>(a, a2)’
Constainer/impl/../Array.hxx:89:14:   in constexpr expansion of ‘Constainer::equal<const int*, const int*>((& lhs)->Constainer::Array<T, Size>::begin<int, 10ul>(), (& lhs)->Constainer::Array<T, Size>::end<int, 10ul>(), (& rhs)->Constainer::Array<T, Size>::begin<int, 10ul>(), (& rhs)->Constainer::Array<T, Size>::end<int, 10ul>())’
Constainer/impl/../Algorithms.hxx:269:26:   in constexpr expansion of ‘Constainer::equal<const int*, const int*, std::equal_to<void> >(first1, last1, first2, last2, (std::equal_to<void>(), std::equal_to<void>()))’
Constainer/impl/../Algorithms.hxx:264:31:   in constexpr expansion of ‘Constainer::mismatch<const int*, const int*, std::equal_to<void> >(first1, last1, first2, last2, (comp, std::equal_to<void>()))’
Constainer/impl/../Algorithms.hxx:220:2: error: ‘(((const int*)(& a.Constainer::Array<int, 10ul>::_storage)) == (((const int*)(& a.Constainer::Array<int, 10ul>::_storage)) + 40u))’ is not a constant expression
  while (first1 != last1 && first2 != last2) {
  ^

Reduces to

struct A {int arr[3] {1, 2, 3};} constexpr a{};
static_assert( a.arr != a.arr+3 );

Reported as #67380, dup of #67376.

GCC complains about partial specializations of Parser::handleFormatSpecifier

GCC spits out a bunch of error messages corresponding to all partial specializations of handleFormatSpecifier:

…/StaticPrintf.hxx:412:9: error: template argument ‘Tokens::      character’ involves template parameter(s)
struct handleFormatSpecifier<Tokens::character, ch...> : handleRest<ch...> {
                             ^

GCC doesn't properly distinguish between template parameters of a member template and the surrounding template when testing validity of specialized non-type arguments in partial specializations. Filed as #67593.

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