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rename rustc_attr to rustc_attr_parsing and create rustc_attr_data_st…
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2 changes: 1 addition & 1 deletion
2
compiler/rustc_attr/Cargo.toml → ...ler/rustc_attr_data_structures/Cargo.toml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| [package] | ||
| name = "rustc_attr" | ||
| name = "rustc_attr_data_structures" | ||
| version = "0.0.0" | ||
| edition = "2021" | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| use rustc_abi::Align; | ||
| use rustc_ast as ast; | ||
| use rustc_macros::{Decodable, Encodable, HashStable_Generic}; | ||
| use rustc_span::{Span, Symbol}; | ||
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| use crate::RustcVersion; | ||
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| #[derive(Copy, Clone, PartialEq, Encodable, Decodable, Debug, HashStable_Generic)] | ||
| pub enum InlineAttr { | ||
| None, | ||
| Hint, | ||
| Always, | ||
| Never, | ||
| } | ||
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| #[derive(Clone, Encodable, Decodable, Debug, PartialEq, Eq, HashStable_Generic)] | ||
| pub enum InstructionSetAttr { | ||
| ArmA32, | ||
| ArmT32, | ||
| } | ||
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| #[derive(Clone, Encodable, Decodable, Debug, HashStable_Generic)] | ||
| pub enum OptimizeAttr { | ||
| None, | ||
| Speed, | ||
| Size, | ||
| } | ||
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| #[derive(Clone, Debug, Encodable, Decodable)] | ||
| pub enum DiagnosticAttribute { | ||
| // tidy-alphabetical-start | ||
| DoNotRecommend, | ||
| OnUnimplemented, | ||
| // tidy-alphabetical-end | ||
| } | ||
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| #[derive(PartialEq, Debug, Encodable, Decodable, Copy, Clone)] | ||
| pub enum ReprAttr { | ||
| ReprInt(IntType), | ||
| ReprRust, | ||
| ReprC, | ||
| ReprPacked(Align), | ||
| ReprSimd, | ||
| ReprTransparent, | ||
| ReprAlign(Align), | ||
| } | ||
| pub use ReprAttr::*; | ||
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| pub enum TransparencyError { | ||
| UnknownTransparency(Symbol, Span), | ||
| MultipleTransparencyAttrs(Span, Span), | ||
| } | ||
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| #[derive(Eq, PartialEq, Debug, Copy, Clone)] | ||
| #[derive(Encodable, Decodable)] | ||
| pub enum IntType { | ||
| SignedInt(ast::IntTy), | ||
| UnsignedInt(ast::UintTy), | ||
| } | ||
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| #[derive(Copy, Debug, Encodable, Decodable, Clone, HashStable_Generic)] | ||
| pub struct Deprecation { | ||
| pub since: DeprecatedSince, | ||
| /// The note to issue a reason. | ||
| pub note: Option<Symbol>, | ||
| /// A text snippet used to completely replace any use of the deprecated item in an expression. | ||
| /// | ||
| /// This is currently unstable. | ||
| pub suggestion: Option<Symbol>, | ||
| } | ||
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| /// Release in which an API is deprecated. | ||
| #[derive(Copy, Debug, Encodable, Decodable, Clone, HashStable_Generic)] | ||
| pub enum DeprecatedSince { | ||
| RustcVersion(RustcVersion), | ||
| /// Deprecated in the future ("to be determined"). | ||
| Future, | ||
| /// `feature(staged_api)` is off. Deprecation versions outside the standard | ||
| /// library are allowed to be arbitrary strings, for better or worse. | ||
| NonStandard(Symbol), | ||
| /// Deprecation version is unspecified but optional. | ||
| Unspecified, | ||
| /// Failed to parse a deprecation version, or the deprecation version is | ||
| /// unspecified and required. An error has already been emitted. | ||
| Err, | ||
| } | ||
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| impl Deprecation { | ||
| /// Whether an item marked with #[deprecated(since = "X")] is currently | ||
| /// deprecated (i.e., whether X is not greater than the current rustc | ||
| /// version). | ||
| pub fn is_in_effect(&self) -> bool { | ||
| match self.since { | ||
| DeprecatedSince::RustcVersion(since) => since <= RustcVersion::CURRENT, | ||
| DeprecatedSince::Future => false, | ||
| // The `since` field doesn't have semantic purpose without `#![staged_api]`. | ||
| DeprecatedSince::NonStandard(_) => true, | ||
| // Assume deprecation is in effect if "since" field is absent or invalid. | ||
| DeprecatedSince::Unspecified | DeprecatedSince::Err => true, | ||
| } | ||
| } | ||
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| pub fn is_since_rustc_version(&self) -> bool { | ||
| matches!(self.since, DeprecatedSince::RustcVersion(_)) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| //! Centralized logic for parsing and validating all attributes used after HIR. | ||
| //! | ||
| //! History: Check out [#131229](https://github.com/rust-lang/rust/issues/131229). | ||
| //! There used to be only one definition of attributes in the compiler: `ast::Attribute`. | ||
| //! These were then parsed or validated or both in places distributed all over the compiler. | ||
| //! | ||
| //! Attributes are markers on items. Most are actually attribute-like proc-macros, and are expanded | ||
| //! but some remain as the built-in attributes to guide compilation. | ||
| //! | ||
| //! In this crate, syntactical attributes (sequences of tokens that look like | ||
| //! `#[something(something else)]`) are parsed into more semantic attributes, markers on items. | ||
| //! Multiple syntactic attributes might influence a single semantic attribute. For example, | ||
| //! `#[stable(...)]` and `#[unstable()]` cannot occur together, and both semantically define | ||
| //! a "stability". Stability defines an [`AttributeExtractor`](attributes::AttributeExtractor) | ||
| //! that recognizes both `#[stable()]` and `#[unstable()]` syntactic attributes, and at the end | ||
| //! produce a single [`ParsedAttributeKind::Stability`]. | ||
| //! | ||
| //! FIXME(jdonszelmann): update devguide for best practices on attributes | ||
| //! FIXME(jdonszelmann): rename to `rustc_attr` in the future, integrating it into this crate. | ||
| //! | ||
| //! To define a new builtin, first add it | ||
| // tidy-alphabetical-start | ||
| #![allow(internal_features)] | ||
| #![doc(rust_logo)] | ||
| #![feature(let_chains)] | ||
| #![feature(rustdoc_internals)] | ||
| #![warn(unreachable_pub)] | ||
| // tidy-alphabetical-end | ||
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| mod attributes; | ||
| mod stability; | ||
| mod version; | ||
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| pub use attributes::*; | ||
| pub(crate) use rustc_session::HashStableContext; | ||
| pub use stability::*; | ||
| pub use version::*; |
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