Comments (2)
There are even more confusing examples I believe (trying to disentangle my metaprograming to produce a minimal example...)
from fusion.
Ahaaa! Found it, the problem arises when the nested map is not the first element of the outer map. The problem seems to be related to how map_impl
works via recursive inheritance in combination with some broken SFINAE. Here is a failing example that should clearly not fail...
struct Foo {};
struct Bar {};
using Child = boost::fusion::map<boost::fusion::pair<Foo, int>>;
using Parent = boost::fusion::map<
boost::fusion::pair<Foo, float>,
boost::fusion::pair<Bar, Child>>;
auto example()
{
return Parent{
boost::fusion::pair<Foo, float>{42.0f},
boost::fusion::pair<Bar, Child>{Child{
boost::fusion::pair<Foo, int>{42}}}};
}
from fusion.
Related Issues (20)
- Merge to master
- Get member name of sequence defined by BOOST_FUSION_DEFINE_STRUCT_INLINE HOT 1
- Overzealously defining __device__ functions when compiling with nvcc HOT 3
- reverse_fold has no static assert for requiring bidirectional sequence HOT 1
- Testcase failure with optimization -O2 and -O1 in gcc and llvm
- Propose for inplace construct from Fusion Sequence
- List of non BOOST-prefixed macros
- clang-10 warning: definition of implicit copy constructor is deprecated HOT 1
- associability of single_view (and associability preservation of some algorithms)
- make_map<int>(make_vector()) cannot be compiled HOT 3
- What about "boost pfr" extension? HOT 8
- Is there a identity_view? HOT 8
- Potential non consistency in documentation HOT 2
- CI for Linux? HOT 2
- qvm not usable in spirit::x3
- Alternative way to adapt struct? HOT 3
- The result of `value_at` with `std::tuple` does not match result of `value_at` with `boost::fusion::vector` HOT 2
- Please sync main branch with develop HOT 12
- 'J': is not a valid type for non-type template parameter 'J' error in boost\fusion\container\vector\vector.hpp HOT 4
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from fusion.