Remove support for handles and resources#346
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alexcrichton merged 3 commits intobytecodealliance:mainfrom Oct 5, 2022
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Remove support for handles and resources#346alexcrichton merged 3 commits intobytecodealliance:mainfrom
alexcrichton merged 3 commits intobytecodealliance:mainfrom
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This commit removes all support for the `resource` and `Handle` types from the AST of `wit-parser` and all related support in all code generators. The motivation for this commit is that `wit-bindgen` is on the cusp of actually being able to work with components: producing a component from guest output and consuming components in host generators. More detail about this is in bytecodealliance#314. With components as an intermediate format, however, there is no way to encode resources since they are not part of the component model proposal yet. All is not lost for handles and resources, though. The official design for handles and resources is being worked on upstream in the component model repository itself at this time and once added all of this support will be re-added to `wit-bindgen`. In the meantime though I personally think that the best way forward is to remove the interim support for a few reasons: * Primarily it unblocks progress at this time towards fully integrating components and the `wit-bindgen` generators. The requirement to run existing tests that use handles would mean that no host generator could actually switch to components and/or modes for today's core-wasm-lookalike would need to be preserved. * Otherwise though the semantics of the current handles are basically invented out of thin air by myself and were never really formally specified, debated, or designed deliberately. I grafted `witx`-style handles into `wit-component` and added features as necessary over time, but it seems highly unlikely that the handles designed as part of the component model will be the ones that `wit-bindgen` currently supports. This inevitably means that a new system would need new code anyway and would likely result in removal regardless. As usual git always has the history of handles and this all may come back in one shape or another if only slightly tweaked. I'm confident in our history spelunking abilities, though, so I don't feel that keeping support in the repository is necessary for this purpose.
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because handles and resources support were already removed in the main branch of wit-bindgen bytecodealliance/wit-bindgen#346
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This commit removes all support for the
resourceandHandletypes from the AST ofwit-parserand all related support in all code generators. The motivation for this commit is thatwit-bindgenis on the cusp of actually being able to work with components: producing a component from guest output and consuming components in host generators. More detail about this is in #314. With components as an intermediate format, however, there is no way to encode resources since they are not part of the component model proposal yet.All is not lost for handles and resources, though. The official design for handles and resources is being worked on upstream in the component model repository itself at this time and once added all of this support will be re-added to
wit-bindgen. In the meantime though I personally think that the best way forward is to remove the interim support for a few reasons:Primarily it unblocks progress at this time towards fully integrating components and the
wit-bindgengenerators. The requirement to run existing tests that use handles would mean that no host generator could actually switch to components and/or modes for today's core-wasm-lookalike would need to be preserved.Otherwise though the semantics of the current handles are basically invented out of thin air by myself and were never really formally specified, debated, or designed deliberately. I grafted
witx-style handles intowit-componentand added features as necessary over time, but it seems highly unlikely that the handles designed as part of the component model will be the ones thatwit-bindgencurrently supports. This inevitably means that a new system would need new code anyway and would likely result in removal regardless.As usual git always has the history of handles and this all may come back in one shape or another if only slightly tweaked. I'm confident in our history spelunking abilities, though, so I don't feel that keeping support in the repository is necessary for this purpose.