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Hierarchy of Sized traits#3729

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davidtwco wants to merge 64 commits intorust-lang:masterrust-lang/rfcs:masterfrom davidtwco:sized-hierarchydavidtwco/rfcs:sized-hierarchyCopy head branch name to clipboard

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Commits on Nov 14, 2024

• hierarchy of sized traits

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  45d9eac

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• updates from EuroRust discussions

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  dedc078

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• updates post niko-discussion

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  2eaaddb

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• add reasoning about constness

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• add diamond hierarchy

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• using const traits

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• improved diagram

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• address review comments

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• future possibility for externref

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• dynsized -> valuesized

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• "statically known at runtime" -> "runtime constant"

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Commits on Nov 15, 2024

• elaborate on determining runtime-sized size

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• const-stable size_of_val + ed. migration detail

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• remove const pointee

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• elaborate on runtime-sized const prohibition

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  a0f7bb7

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• add acknowledgements section

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• mention PhantomData

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• mention extension options

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  487de4d

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• move to correct filename

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  26f0ace

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• correct Copy is a subtrait of Sized

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  fmease

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Commits on Nov 16, 2024

• correct supertrait/subtrait

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• remove rust= from code blocks

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  95a1b7d

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• correct usage of const trait

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• mention context for dynamic stack allocation

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• use current const trait syntax

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  a703feb

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• correct incorrect syntax

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• list all alternate bounds

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  2fb3aaa

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• mention ?Trait being accepted for non-Sized

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Commits on Nov 18, 2024

• use distinct Pointee trait

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  0c2f6e6

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• correct bound in size_of_val description

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  397e474

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• update info about size_of_val and align_of_val

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  6c1482b

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• correct extern types in structs

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  1f85898

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• elaborate on implicit relaxation

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  5f4b8ff

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Commits on Nov 19, 2024

• further clarify ?Sized alternative

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  ab8e7f6

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• reword references to relaxed bounds

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• strengthen drawback of implicit relaxation

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• mention rfl want

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• weaken language around externref

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  60eab1a

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• further extend ?sized alternatives

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• remove implicit relaxation terminology

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  4faeb83

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Commits on Nov 25, 2024

• mention backwards incompatiblity with trait methods

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  b4258c7

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• changed aligned future possibility

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  61f8d6d

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• elaborate on implicit supertrait

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  9158ebb

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Commits on Nov 26, 2024

• elaborate further on implicit supertraits

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  b71401c

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• add alternative about metasized/mutexes

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Commits on Nov 27, 2024

• further further elaboration on implicit supertraits

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  5573be7

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• fix heading level of alternative

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Commits on Nov 29, 2024

• elaborate on metasized and unsafecell

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  ef2f5cd

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• clarify return types

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Commits on Dec 2, 2024

• clarify that non-const sized is not nameable

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• clarify which pointee

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• clarify relaxed bounds tables

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  8cbaef9

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• further clarifications around relaxed bounds

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• runtime-sized in const is unsound

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• clarify wording of unresolved metasized question

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Commits on Dec 9, 2024

• replace valuesized with metasized

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  57b9a85

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• elaborate on backwards incompat with methods

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• match indentation in code blocks

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Commits on Dec 12, 2024

• fix list of when traits are implemented

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  7a11fe9

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• add example of clone supertrait relaxation

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Commits on Dec 17, 2024

• rationale for delaying size_of bound relaxation

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Commits on Jan 8, 2025

• s/alignment/size

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• add unresolved question for std::ptr::Pointee use

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• clarify that pointee is not semantically necessary

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