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use rustc_abi::Align;
use rustc_ast as ast;
use rustc_macros::{Decodable, Encodable, HashStable_Generic};
use rustc_span::{Span, Symbol};
use crate::RustcVersion;
#[derive(Copy, Clone, PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
pub enum InlineAttr {
None,
Hint,
Always,
Never,
/// `#[rustc_force_inline]` forces inlining to happen in the MIR inliner - it reports an error
/// if the inlining cannot happen. It is limited to only free functions so that the calls
/// can always be resolved.
Force {
attr_span: Span,
reason: Option<Symbol>,
},
}
impl InlineAttr {
pub fn always(&self) -> bool {
match self {
InlineAttr::Always | InlineAttr::Force { .. } => true,
InlineAttr::None | InlineAttr::Hint | InlineAttr::Never => false,
}
}
}
#[derive(Clone, Encodable, Decodable, Debug, PartialEq, Eq, HashStable_Generic)]
pub enum InstructionSetAttr {
ArmA32,
ArmT32,
}
#[derive(Clone, Encodable, Decodable, Debug, PartialEq, Eq, HashStable_Generic, Default)]
pub enum OptimizeAttr {
/// No `#[optimize(..)]` attribute
#[default]
Default,
/// `#[optimize(none)]`
DoNotOptimize,
/// `#[optimize(speed)]`
Speed,
/// `#[optimize(size)]`
Size,
}
impl OptimizeAttr {
pub fn do_not_optimize(&self) -> bool {
matches!(self, Self::DoNotOptimize)
}
}
#[derive(Clone, Debug, Encodable, Decodable)]
pub enum DiagnosticAttribute {
// tidy-alphabetical-start
DoNotRecommend,
OnUnimplemented,
// tidy-alphabetical-end
}
#[derive(PartialEq, Debug, Encodable, Decodable, Copy, Clone)]
pub enum ReprAttr {
ReprInt(IntType),
ReprRust,
ReprC,
ReprPacked(Align),
ReprSimd,
ReprTransparent,
ReprAlign(Align),
}
pub use ReprAttr::*;
pub enum TransparencyError {
UnknownTransparency(Symbol, Span),
MultipleTransparencyAttrs(Span, Span),
}
#[derive(Eq, PartialEq, Debug, Copy, Clone)]
#[derive(Encodable, Decodable)]
pub enum IntType {
SignedInt(ast::IntTy),
UnsignedInt(ast::UintTy),
}
#[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>,
}
/// 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,
}
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,
}
}
pub fn is_since_rustc_version(&self) -> bool {
matches!(self.since, DeprecatedSince::RustcVersion(_))
}
}
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