Allocator redesign #38
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Switch to an allocator model similar to the STL. This required updating List, Vector, and SharedPtr, the current allocator clients. Users of allocators should generally indirect their operations through AllocTraits. This allows user-provided allocators to provide a minimal set of basis operations (AllocBytes + FreeBytes, or Alloc + Free), while letting the remainder of the operations to be given sane defaults. This PR's approach to allocators deviates from the STL, in that allocator types aren't required to be templated on the value type. This makes allocator implementations more approachable, avoids the need to rebind, and can even help build throughput due to fewer template instantiations. This PR also provides StdAllocator, a radiant allocator that forwards to std::allocator. This both provides an example of an allocator with all the features turned on, as well as provide the path to constexpr containers, if we want to go down that path. There are multiple test allocators (like Mallocator) that demonstrate the minimal interface. There are some drive-by fixes / changes to List and Vector. There were missing self-assignment / self-splicing checks before hand. Vector also didn't have a move ctor, but did have an allocator move ctor. Also I fixed one of the many FalseTypes. Useful background reading on implementing allocators: https://thephd.dev/allocator-hell-small_bit_vector .
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Switch to an allocator model similar to the STL. This required updating List, Vector, and SharedPtr, the current allocator clients.
Users of allocators should generally indirect their operations through AllocTraits. This allows user-provided allocators to provide a minimal set of basis operations (AllocBytes + FreeBytes, or Alloc + Free), while letting the remainder of the operations to be given sane defaults. This PR's approach to allocators deviates from the STL, in that allocator types aren't required to be templated on the value type. This makes allocator implementations more approachable, avoids the need to rebind, and can even help build throughput due to fewer template instantiations.
This PR also provides StdAllocator, a radiant allocator that forwards to std::allocator. This both provides an example of an allocator with all the features turned on, as well as provide the path to constexpr containers, if we want to go down that path. There are multiple test allocators (like Mallocator) that demonstrate the minimal interface.
There are some drive-by fixes / changes to List and Vector. There were missing self-assignment / self-splicing checks before hand. Vector also didn't have a move ctor, but did have an allocator move ctor. Also I fixed one of the many FalseTypes.
Useful background reading on implementing allocators: https://thephd.dev/allocator-hell-small_bit_vector .