Introduce string_enum!; migrate lint Level and other CLI flag enums - #158123

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palozano wants to merge 9 commits into

rust-lang:mainfrom

palozano:feat/lint-level-string-enum

Commits on Jul 21, 2026

refactor(session): add `string_enum!` macro for CLI flag enums
palozano
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refactor(session): use `string_enum!` for `-C`/`-Z` value enums, structure diagnostic
palozano
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refactor(session): extend `string_enum!` for aliases, migrate `DebugInfo`
palozano
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refactor(session): migrate `CFProtection` with bool+none parse helper
palozano
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refactor(session): migrate `Polonius`, `InstrumentCoverage`, `LtoCli`
palozano
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refactor(session): support discriminants in `string_enum!`, migrate `CollapseMacroDebuginfo`
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refactor(data_structures): extend `string_enum!` with `@no_from_str`
palozano
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refactor(lint_defs): migrate `Level` to `string_enum!`
palozano
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refactor(data_structures): generate `FROM_STR_VARIANTS` in `string_enum!`
palozano
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