builtin-derive: tag → discriminant #123919
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rustbot has assigned @compiler-errors. Use |
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Changes to the code generated for builtin derived traits. cc @nnethercote |
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…errors builtin-derive: tag → discriminant As far as I can tell, all of this operates on the discriminant, not the tag. After all, with something like `Option<&T>`, the "tag" of the `Some` variant is basically just the reference value, which is never what you want to compare when figuring out which variant the enum is in. See [here](https://rustc-dev-guide.rust-lang.org/appendix/glossary.html) for an explanation of the difference between tag and discriminant.
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Rollup of 12 pull requests Successful merges: - rust-lang#123423 (Distribute LLVM bitcode linker as a preview component) - rust-lang#123548 (libtest: also measure time in Miri) - rust-lang#123666 (Fix some typos in doc) - rust-lang#123864 (Remove a HACK by instead inferring opaque types during expected/formal type checking) - rust-lang#123896 (Migrate some diagnostics in `rustc_resolve` to session diagnostic) - rust-lang#123919 (builtin-derive: tag → discriminant) - rust-lang#123922 (Remove magic constants when using `base_n`.) - rust-lang#123931 (Don't leak unnameable types in `-> _` recover) - rust-lang#123933 (move the LargeAssignments lint logic into its own file) - rust-lang#123934 (`rustc_data_structures::graph` mini refactor) - rust-lang#123941 (Fix UB in LLVM FFI when passing zero or >1 bundle) - rust-lang#123957 (disable create_dir_all_bare test on all(miri, windows)) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#123919 - RalfJung:discriminant, r=compiler-errors builtin-derive: tag → discriminant As far as I can tell, all of this operates on the discriminant, not the tag. After all, with something like `Option<&T>`, the "tag" of the `Some` variant is basically just the reference value, which is never what you want to compare when figuring out which variant the enum is in. See [here](https://rustc-dev-guide.rust-lang.org/appendix/glossary.html) for an explanation of the difference between tag and discriminant.
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As far as I can tell, all of this operates on the discriminant, not the tag. After all, with something like
Option<&T>, the "tag" of theSomevariant is basically just the reference value, which is never what you want to compare when figuring out which variant the enum is in.See here for an explanation of the difference between tag and discriminant.