Nicholas Nethercote 4852291417 Introduce ConstAllocation. ... Currently some `Allocation`s are interned, some are not, and it's very hard to tell at a use point which is which. This commit introduces `ConstAllocation` for the known-interned ones, which makes the division much clearer. `ConstAllocation::inner()` is used to get the underlying `Allocation`. In some places it's natural to use an `Allocation`, in some it's natural to use a `ConstAllocation`, and in some places there's no clear choice. I've tried to make things look as nice as possible, while generally favouring `ConstAllocation`, which is the type that embodies more information. This does require quite a few calls to `inner()`. The commit also tweaks how `PartialOrd` works for `Interned`. The previous code was too clever by half, building on `T: Ord` to make the code shorter. That caused problems with deriving `PartialOrd` and `Ord` for `ConstAllocation`, so I changed it to build on `T: PartialOrd`, which is slightly more verbose but much more standard and avoided the problems.		2022-03-07 08:25:50 +11:00
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src	Introduce ConstAllocation.	2022-03-07 08:25:50 +11:00
Cargo.toml	Migrate to 2021	2021-09-20 22:21:42 -04:00