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use crate::def::{CtorKind, DefKind, Res};
use crate::def_id::DefId;
pub(crate) use crate::hir_id::{HirId, ItemLocalId, OwnerId};
use crate::intravisit::FnKind;
use crate::LangItem;
use rustc_ast as ast;
use rustc_ast::util::parser::ExprPrecedence;
use rustc_ast::{Attribute, FloatTy, IntTy, Label, LitKind, TraitObjectSyntax, UintTy};
pub use rustc_ast::{BindingAnnotation, BorrowKind, ByRef, ImplPolarity, IsAuto};
pub use rustc_ast::{CaptureBy, Movability, Mutability};
use rustc_ast::{InlineAsmOptions, InlineAsmTemplatePiece};
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::sorted_map::SortedMap;
use rustc_error_messages::MultiSpan;
use rustc_index::vec::IndexVec;
use rustc_macros::HashStable_Generic;
use rustc_span::hygiene::MacroKind;
use rustc_span::source_map::Spanned;
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::{def_id::LocalDefId, BytePos, Span, DUMMY_SP};
use rustc_target::asm::InlineAsmRegOrRegClass;
use rustc_target::spec::abi::Abi;
use smallvec::SmallVec;
use std::fmt;
#[derive(Debug, Copy, Clone, Encodable, HashStable_Generic)]
pub struct Lifetime {
pub hir_id: HirId,
pub ident: Ident,
pub res: LifetimeName,
}
#[derive(Debug, Clone, PartialEq, Eq, Encodable, Hash, Copy)]
#[derive(HashStable_Generic)]
pub enum ParamName {
Plain(Ident),
Fresh,
Error,
}
impl ParamName {
pub fn ident(&self) -> Ident {
match *self {
ParamName::Plain(ident) => ident,
ParamName::Fresh | ParamName::Error => Ident::with_dummy_span(kw::UnderscoreLifetime),
}
}
pub fn normalize_to_macros_2_0(&self) -> ParamName {
match *self {
ParamName::Plain(ident) => ParamName::Plain(ident.normalize_to_macros_2_0()),
param_name => param_name,
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Encodable, Hash, Copy)]
#[derive(HashStable_Generic)]
pub enum LifetimeName {
Param(LocalDefId),
ImplicitObjectLifetimeDefault,
Error,
Infer,
Static,
}
impl LifetimeName {
pub fn is_elided(&self) -> bool {
match self {
LifetimeName::ImplicitObjectLifetimeDefault | LifetimeName::Infer => true,
LifetimeName::Error | LifetimeName::Param(..) | LifetimeName::Static => false,
}
}
}
impl fmt::Display for Lifetime {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.ident.name != kw::Empty { self.ident.name.fmt(f) } else { "'_".fmt(f) }
}
}
pub enum LifetimeSuggestionPosition {
Normal,
Ampersand,
ElidedPath,
ElidedPathArgument,
ObjectDefault,
}
impl Lifetime {
pub fn is_elided(&self) -> bool {
self.res.is_elided()
}
pub fn is_anonymous(&self) -> bool {
self.ident.name == kw::Empty || self.ident.name == kw::UnderscoreLifetime
}
pub fn suggestion_position(&self) -> (LifetimeSuggestionPosition, Span) {
if self.ident.name == kw::Empty {
if self.ident.span.is_empty() {
(LifetimeSuggestionPosition::ElidedPathArgument, self.ident.span)
} else {
(LifetimeSuggestionPosition::ElidedPath, self.ident.span.shrink_to_hi())
}
} else if self.res == LifetimeName::ImplicitObjectLifetimeDefault {
(LifetimeSuggestionPosition::ObjectDefault, self.ident.span)
} else if self.ident.span.is_empty() {
(LifetimeSuggestionPosition::Ampersand, self.ident.span)
} else {
(LifetimeSuggestionPosition::Normal, self.ident.span)
}
}
pub fn is_static(&self) -> bool {
self.res == LifetimeName::Static
}
}
#[derive(Debug, HashStable_Generic)]
pub struct Path<'hir, R = Res> {
pub span: Span,
pub res: R,
pub segments: &'hir [PathSegment<'hir>],
}
pub type UsePath<'hir> = Path<'hir, SmallVec<[Res; 3]>>;
impl Path<'_> {
pub fn is_global(&self) -> bool {
!self.segments.is_empty() && self.segments[0].ident.name == kw::PathRoot
}
}
#[derive(Debug, HashStable_Generic)]
pub struct PathSegment<'hir> {
pub ident: Ident,
pub hir_id: HirId,
pub res: Res,
pub args: Option<&'hir GenericArgs<'hir>>,
pub infer_args: bool,
}
impl<'hir> PathSegment<'hir> {
pub fn new(ident: Ident, hir_id: HirId, res: Res) -> PathSegment<'hir> {
PathSegment { ident, hir_id, res, infer_args: true, args: None }
}
pub fn invalid() -> Self {
Self::new(Ident::empty(), HirId::INVALID, Res::Err)
}
pub fn args(&self) -> &GenericArgs<'hir> {
if let Some(ref args) = self.args {
args
} else {
const DUMMY: &GenericArgs<'_> = &GenericArgs::none();
DUMMY
}
}
}
#[derive(Encodable, Debug, HashStable_Generic)]
pub struct ConstArg {
pub value: AnonConst,
pub span: Span,
}
#[derive(Encodable, Debug, HashStable_Generic)]
pub struct InferArg {
pub hir_id: HirId,
pub span: Span,
}
impl InferArg {
pub fn to_ty(&self) -> Ty<'_> {
Ty { kind: TyKind::Infer, span: self.span, hir_id: self.hir_id }
}
}
#[derive(Debug, HashStable_Generic)]
pub enum GenericArg<'hir> {
Lifetime(&'hir Lifetime),
Type(&'hir Ty<'hir>),
Const(ConstArg),
Infer(InferArg),
}
impl GenericArg<'_> {
pub fn span(&self) -> Span {
match self {
GenericArg::Lifetime(l) => l.ident.span,
GenericArg::Type(t) => t.span,
GenericArg::Const(c) => c.span,
GenericArg::Infer(i) => i.span,
}
}
pub fn hir_id(&self) -> HirId {
match self {
GenericArg::Lifetime(l) => l.hir_id,
GenericArg::Type(t) => t.hir_id,
GenericArg::Const(c) => c.value.hir_id,
GenericArg::Infer(i) => i.hir_id,
}
}
pub fn is_synthetic(&self) -> bool {
matches!(self, GenericArg::Lifetime(lifetime) if lifetime.ident == Ident::empty())
}
pub fn descr(&self) -> &'static str {
match self {
GenericArg::Lifetime(_) => "lifetime",
GenericArg::Type(_) => "type",
GenericArg::Const(_) => "constant",
GenericArg::Infer(_) => "inferred",
}
}
pub fn to_ord(&self) -> ast::ParamKindOrd {
match self {
GenericArg::Lifetime(_) => ast::ParamKindOrd::Lifetime,
GenericArg::Type(_) | GenericArg::Const(_) | GenericArg::Infer(_) => {
ast::ParamKindOrd::TypeOrConst
}
}
}
pub fn is_ty_or_const(&self) -> bool {
match self {
GenericArg::Lifetime(_) => false,
GenericArg::Type(_) | GenericArg::Const(_) | GenericArg::Infer(_) => true,
}
}
}
#[derive(Debug, HashStable_Generic)]
pub struct GenericArgs<'hir> {
pub args: &'hir [GenericArg<'hir>],
pub bindings: &'hir [TypeBinding<'hir>],
pub parenthesized: bool,
pub span_ext: Span,
}
impl<'hir> GenericArgs<'hir> {
pub const fn none() -> Self {
Self { args: &[], bindings: &[], parenthesized: false, span_ext: DUMMY_SP }
}
pub fn inputs(&self) -> &[Ty<'hir>] {
if self.parenthesized {
for arg in self.args {
match arg {
GenericArg::Lifetime(_) => {}
GenericArg::Type(ref ty) => {
if let TyKind::Tup(ref tys) = ty.kind {
return tys;
}
break;
}
GenericArg::Const(_) => {}
GenericArg::Infer(_) => {}
}
}
}
panic!("GenericArgs::inputs: not a `Fn(T) -> U`");
}
#[inline]
pub fn has_type_params(&self) -> bool {
self.args.iter().any(|arg| matches!(arg, GenericArg::Type(_)))
}
pub fn has_err(&self) -> bool {
self.args.iter().any(|arg| match arg {
GenericArg::Type(ty) => matches!(ty.kind, TyKind::Err),
_ => false,
}) || self.bindings.iter().any(|arg| match arg.kind {
TypeBindingKind::Equality { term: Term::Ty(ty) } => matches!(ty.kind, TyKind::Err),
_ => false,
})
}
#[inline]
pub fn num_type_params(&self) -> usize {
self.args.iter().filter(|arg| matches!(arg, GenericArg::Type(_))).count()
}
#[inline]
pub fn num_lifetime_params(&self) -> usize {
self.args.iter().filter(|arg| matches!(arg, GenericArg::Lifetime(_))).count()
}
#[inline]
pub fn has_lifetime_params(&self) -> bool {
self.args.iter().any(|arg| matches!(arg, GenericArg::Lifetime(_)))
}
#[inline]
pub fn num_generic_params(&self) -> usize {
self.args.iter().filter(|arg| !matches!(arg, GenericArg::Lifetime(_))).count()
}
pub fn span(&self) -> Option<Span> {
let span_ext = self.span_ext()?;
Some(span_ext.with_lo(span_ext.lo() + BytePos(1)).with_hi(span_ext.hi() - BytePos(1)))
}
pub fn span_ext(&self) -> Option<Span> {
Some(self.span_ext).filter(|span| !span.is_empty())
}
pub fn is_empty(&self) -> bool {
self.args.is_empty()
}
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Hash, Debug)]
#[derive(HashStable_Generic)]
pub enum TraitBoundModifier {
None,
Maybe,
MaybeConst,
}
#[derive(Clone, Debug, HashStable_Generic)]
pub enum GenericBound<'hir> {
Trait(PolyTraitRef<'hir>, TraitBoundModifier),
LangItemTrait(LangItem, Span, HirId, &'hir GenericArgs<'hir>),
Outlives(&'hir Lifetime),
}
impl GenericBound<'_> {
pub fn trait_ref(&self) -> Option<&TraitRef<'_>> {
match self {
GenericBound::Trait(data, _) => Some(&data.trait_ref),
_ => None,
}
}
pub fn span(&self) -> Span {
match self {
GenericBound::Trait(t, ..) => t.span,
GenericBound::LangItemTrait(_, span, ..) => *span,
GenericBound::Outlives(l) => l.ident.span,
}
}
}
pub type GenericBounds<'hir> = &'hir [GenericBound<'hir>];
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Debug, HashStable_Generic)]
pub enum LifetimeParamKind {
Explicit,
Elided,
Error,
}
#[derive(Debug, HashStable_Generic)]
pub enum GenericParamKind<'hir> {
Lifetime {
kind: LifetimeParamKind,
},
Type {
default: Option<&'hir Ty<'hir>>,
synthetic: bool,
},
Const {
ty: &'hir Ty<'hir>,
default: Option<AnonConst>,
},
}
#[derive(Debug, HashStable_Generic)]
pub struct GenericParam<'hir> {
pub hir_id: HirId,
pub def_id: LocalDefId,
pub name: ParamName,
pub span: Span,
pub pure_wrt_drop: bool,
pub kind: GenericParamKind<'hir>,
pub colon_span: Option<Span>,
}
impl<'hir> GenericParam<'hir> {
pub fn is_impl_trait(&self) -> bool {
matches!(self.kind, GenericParamKind::Type { synthetic: true, .. })
}
pub fn is_elided_lifetime(&self) -> bool {
matches!(self.kind, GenericParamKind::Lifetime { kind: LifetimeParamKind::Elided })
}
}
#[derive(Default)]
pub struct GenericParamCount {
pub lifetimes: usize,
pub types: usize,
pub consts: usize,
pub infer: usize,
}
#[derive(Debug, HashStable_Generic)]
pub struct Generics<'hir> {
pub params: &'hir [GenericParam<'hir>],
pub predicates: &'hir [WherePredicate<'hir>],
pub has_where_clause_predicates: bool,
pub where_clause_span: Span,
pub span: Span,
}
impl<'hir> Generics<'hir> {
pub const fn empty() -> &'hir Generics<'hir> {
const NOPE: Generics<'_> = Generics {
params: &[],
predicates: &[],
has_where_clause_predicates: false,
where_clause_span: DUMMY_SP,
span: DUMMY_SP,
};
&NOPE
}
pub fn get_named(&self, name: Symbol) -> Option<&GenericParam<'hir>> {
self.params.iter().find(|¶m| name == param.name.ident().name)
}
pub fn spans(&self) -> MultiSpan {
if self.params.is_empty() {
self.span.into()
} else {
self.params.iter().map(|p| p.span).collect::<Vec<Span>>().into()
}
}
pub fn span_for_lifetime_suggestion(&self) -> Option<Span> {
if let Some(first) = self.params.first()
&& self.span.contains(first.span)
{
Some(first.span.shrink_to_lo())
} else {
None
}
}
pub fn span_for_param_suggestion(&self) -> Option<Span> {
if self.params.iter().any(|p| self.span.contains(p.span)) {
let span = self.span.with_lo(self.span.hi() - BytePos(1)).shrink_to_lo();
Some(span)
} else {
None
}
}
pub fn tail_span_for_predicate_suggestion(&self) -> Span {
let end = self.where_clause_span.shrink_to_hi();
if self.has_where_clause_predicates {
self.predicates
.iter()
.rfind(|&p| p.in_where_clause())
.map_or(end, |p| p.span())
.shrink_to_hi()
.to(end)
} else {
end
}
}
pub fn add_where_or_trailing_comma(&self) -> &'static str {
if self.has_where_clause_predicates {
","
} else if self.where_clause_span.is_empty() {
" where"
} else {
""
}
}
pub fn bounds_for_param(
&self,
param_def_id: LocalDefId,
) -> impl Iterator<Item = &WhereBoundPredicate<'hir>> {
self.predicates.iter().filter_map(move |pred| match pred {
WherePredicate::BoundPredicate(bp) if bp.is_param_bound(param_def_id.to_def_id()) => {
Some(bp)
}
_ => None,
})
}
pub fn outlives_for_param(
&self,
param_def_id: LocalDefId,
) -> impl Iterator<Item = &WhereRegionPredicate<'_>> {
self.predicates.iter().filter_map(move |pred| match pred {
WherePredicate::RegionPredicate(rp) if rp.is_param_bound(param_def_id) => Some(rp),
_ => None,
})
}
pub fn bounds_span_for_suggestions(&self, param_def_id: LocalDefId) -> Option<Span> {
self.bounds_for_param(param_def_id).flat_map(|bp| bp.bounds.iter().rev()).find_map(
|bound| {
let bs = bound.span();
if bs.can_be_used_for_suggestions() { Some(bs.shrink_to_hi()) } else { None }
},
)
}
pub fn span_for_predicate_removal(&self, pos: usize) -> Span {
let predicate = &self.predicates[pos];
let span = predicate.span();
if !predicate.in_where_clause() {
return span;
}
if pos < self.predicates.len() - 1 {
let next_pred = &self.predicates[pos + 1];
if next_pred.in_where_clause() {
return span.until(next_pred.span());
}
}
if pos > 0 {
let prev_pred = &self.predicates[pos - 1];
if prev_pred.in_where_clause() {
return prev_pred.span().shrink_to_hi().to(span);
}
}
self.where_clause_span
}
pub fn span_for_bound_removal(&self, predicate_pos: usize, bound_pos: usize) -> Span {
let predicate = &self.predicates[predicate_pos];
let bounds = predicate.bounds();
if bounds.len() == 1 {
return self.span_for_predicate_removal(predicate_pos);
}
let span = bounds[bound_pos].span();
if bound_pos == 0 {
span.to(bounds[1].span().shrink_to_lo())
} else {
bounds[bound_pos - 1].span().shrink_to_hi().to(span)
}
}
}
#[derive(Debug, HashStable_Generic)]
pub enum WherePredicate<'hir> {
BoundPredicate(WhereBoundPredicate<'hir>),
RegionPredicate(WhereRegionPredicate<'hir>),
EqPredicate(WhereEqPredicate<'hir>),
}
impl<'hir> WherePredicate<'hir> {
pub fn span(&self) -> Span {
match self {
WherePredicate::BoundPredicate(p) => p.span,
WherePredicate::RegionPredicate(p) => p.span,
WherePredicate::EqPredicate(p) => p.span,
}
}
pub fn in_where_clause(&self) -> bool {
match self {
WherePredicate::BoundPredicate(p) => p.origin == PredicateOrigin::WhereClause,
WherePredicate::RegionPredicate(p) => p.in_where_clause,
WherePredicate::EqPredicate(_) => false,
}
}
pub fn bounds(&self) -> GenericBounds<'hir> {
match self {
WherePredicate::BoundPredicate(p) => p.bounds,
WherePredicate::RegionPredicate(p) => p.bounds,
WherePredicate::EqPredicate(_) => &[],
}
}
}
#[derive(Copy, Clone, Debug, HashStable_Generic, PartialEq, Eq)]
pub enum PredicateOrigin {
WhereClause,
GenericParam,
ImplTrait,
}
#[derive(Debug, HashStable_Generic)]
pub struct WhereBoundPredicate<'hir> {
pub hir_id: HirId,
pub span: Span,
pub origin: PredicateOrigin,
pub bound_generic_params: &'hir [GenericParam<'hir>],
pub bounded_ty: &'hir Ty<'hir>,
pub bounds: GenericBounds<'hir>,
}
impl<'hir> WhereBoundPredicate<'hir> {
pub fn is_param_bound(&self, param_def_id: DefId) -> bool {
self.bounded_ty.as_generic_param().map_or(false, |(def_id, _)| def_id == param_def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct WhereRegionPredicate<'hir> {
pub span: Span,
pub in_where_clause: bool,
pub lifetime: &'hir Lifetime,
pub bounds: GenericBounds<'hir>,
}
impl<'hir> WhereRegionPredicate<'hir> {
pub fn is_param_bound(&self, param_def_id: LocalDefId) -> bool {
self.lifetime.res == LifetimeName::Param(param_def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct WhereEqPredicate<'hir> {
pub span: Span,
pub lhs_ty: &'hir Ty<'hir>,
pub rhs_ty: &'hir Ty<'hir>,
}
#[derive(Clone, Debug)]
pub struct ParentedNode<'tcx> {
pub parent: ItemLocalId,
pub node: Node<'tcx>,
}
#[derive(Debug)]
pub struct AttributeMap<'tcx> {
pub map: SortedMap<ItemLocalId, &'tcx [Attribute]>,
pub hash: Fingerprint,
}
impl<'tcx> AttributeMap<'tcx> {
pub const EMPTY: &'static AttributeMap<'static> =
&AttributeMap { map: SortedMap::new(), hash: Fingerprint::ZERO };
#[inline]
pub fn get(&self, id: ItemLocalId) -> &'tcx [Attribute] {
self.map.get(&id).copied().unwrap_or(&[])
}
}
pub struct OwnerNodes<'tcx> {
pub hash_including_bodies: Fingerprint,
pub hash_without_bodies: Fingerprint,
pub nodes: IndexVec<ItemLocalId, Option<ParentedNode<'tcx>>>,
pub bodies: SortedMap<ItemLocalId, &'tcx Body<'tcx>>,
pub local_id_to_def_id: SortedMap<ItemLocalId, LocalDefId>,
}
impl<'tcx> OwnerNodes<'tcx> {
pub fn node(&self) -> OwnerNode<'tcx> {
use rustc_index::vec::Idx;
let node = self.nodes[ItemLocalId::new(0)].as_ref().unwrap().node;
let node = node.as_owner().unwrap(); node
}
}
impl fmt::Debug for OwnerNodes<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("OwnerNodes")
.field("node", &self.nodes[ItemLocalId::from_u32(0)])
.field(
"parents",
&self
.nodes
.iter_enumerated()
.map(|(id, parented_node)| (id, parented_node.as_ref().map(|node| node.parent)))
.collect::<Vec<_>>(),
)
.field("bodies", &self.bodies)
.field("local_id_to_def_id", &self.local_id_to_def_id)
.field("hash_without_bodies", &self.hash_without_bodies)
.field("hash_including_bodies", &self.hash_including_bodies)
.finish()
}
}
#[derive(Debug, HashStable_Generic)]
pub struct OwnerInfo<'hir> {
pub nodes: OwnerNodes<'hir>,
pub parenting: FxHashMap<LocalDefId, ItemLocalId>,
pub attrs: AttributeMap<'hir>,
pub trait_map: FxHashMap<ItemLocalId, Box<[TraitCandidate]>>,
}
impl<'tcx> OwnerInfo<'tcx> {
#[inline]
pub fn node(&self) -> OwnerNode<'tcx> {
self.nodes.node()
}
}
#[derive(Copy, Clone, Debug, HashStable_Generic)]
pub enum MaybeOwner<T> {
Owner(T),
NonOwner(HirId),
Phantom,
}
impl<T> MaybeOwner<T> {
pub fn as_owner(self) -> Option<T> {
match self {
MaybeOwner::Owner(i) => Some(i),
MaybeOwner::NonOwner(_) | MaybeOwner::Phantom => None,
}
}
pub fn map<U>(self, f: impl FnOnce(T) -> U) -> MaybeOwner<U> {
match self {
MaybeOwner::Owner(i) => MaybeOwner::Owner(f(i)),
MaybeOwner::NonOwner(hir_id) => MaybeOwner::NonOwner(hir_id),
MaybeOwner::Phantom => MaybeOwner::Phantom,
}
}
pub fn unwrap(self) -> T {
match self {
MaybeOwner::Owner(i) => i,
MaybeOwner::NonOwner(_) | MaybeOwner::Phantom => panic!("Not a HIR owner"),
}
}
}
#[derive(Debug)]
pub struct Crate<'hir> {
pub owners: IndexVec<LocalDefId, MaybeOwner<&'hir OwnerInfo<'hir>>>,
pub hir_hash: Fingerprint,
}
#[derive(Debug, HashStable_Generic)]
pub struct Closure<'hir> {
pub def_id: LocalDefId,
pub binder: ClosureBinder,
pub capture_clause: CaptureBy,
pub bound_generic_params: &'hir [GenericParam<'hir>],
pub fn_decl: &'hir FnDecl<'hir>,
pub body: BodyId,
pub fn_decl_span: Span,
pub fn_arg_span: Option<Span>,
pub movability: Option<Movability>,
}
#[derive(Debug, HashStable_Generic)]
pub struct Block<'hir> {
pub stmts: &'hir [Stmt<'hir>],
pub expr: Option<&'hir Expr<'hir>>,
#[stable_hasher(ignore)]
pub hir_id: HirId,
pub rules: BlockCheckMode,
pub span: Span,
pub targeted_by_break: bool,
}
impl<'hir> Block<'hir> {
pub fn innermost_block(&self) -> &Block<'hir> {
let mut block = self;
while let Some(Expr { kind: ExprKind::Block(inner_block, _), .. }) = block.expr {
block = inner_block;
}
block
}
}
#[derive(Debug, HashStable_Generic)]
pub struct Pat<'hir> {
#[stable_hasher(ignore)]
pub hir_id: HirId,
pub kind: PatKind<'hir>,
pub span: Span,
pub default_binding_modes: bool,
}
impl<'hir> Pat<'hir> {
fn walk_short_(&self, it: &mut impl FnMut(&Pat<'hir>) -> bool) -> bool {
if !it(self) {
return false;
}
use PatKind::*;
match self.kind {
Wild | Lit(_) | Range(..) | Binding(.., None) | Path(_) => true,
Box(s) | Ref(s, _) | Binding(.., Some(s)) => s.walk_short_(it),
Struct(_, fields, _) => fields.iter().all(|field| field.pat.walk_short_(it)),
TupleStruct(_, s, _) | Tuple(s, _) | Or(s) => s.iter().all(|p| p.walk_short_(it)),
Slice(before, slice, after) => {
before.iter().chain(slice).chain(after.iter()).all(|p| p.walk_short_(it))
}
}
}
pub fn walk_short(&self, mut it: impl FnMut(&Pat<'hir>) -> bool) -> bool {
self.walk_short_(&mut it)
}
fn walk_(&self, it: &mut impl FnMut(&Pat<'hir>) -> bool) {
if !it(self) {
return;
}
use PatKind::*;
match self.kind {
Wild | Lit(_) | Range(..) | Binding(.., None) | Path(_) => {}
Box(s) | Ref(s, _) | Binding(.., Some(s)) => s.walk_(it),
Struct(_, fields, _) => fields.iter().for_each(|field| field.pat.walk_(it)),
TupleStruct(_, s, _) | Tuple(s, _) | Or(s) => s.iter().for_each(|p| p.walk_(it)),
Slice(before, slice, after) => {
before.iter().chain(slice).chain(after.iter()).for_each(|p| p.walk_(it))
}
}
}
pub fn walk(&self, mut it: impl FnMut(&Pat<'hir>) -> bool) {
self.walk_(&mut it)
}
pub fn walk_always(&self, mut it: impl FnMut(&Pat<'_>)) {
self.walk(|p| {
it(p);
true
})
}
}
#[derive(Debug, HashStable_Generic)]
pub struct PatField<'hir> {
#[stable_hasher(ignore)]
pub hir_id: HirId,
pub ident: Ident,
pub pat: &'hir Pat<'hir>,
pub is_shorthand: bool,
pub span: Span,
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum RangeEnd {
Included,
Excluded,
}
impl fmt::Display for RangeEnd {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match self {
RangeEnd::Included => "..=",
RangeEnd::Excluded => "..",
})
}
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, HashStable_Generic)]
pub struct DotDotPos(u32);
impl DotDotPos {
pub fn new(n: Option<usize>) -> Self {
match n {
Some(n) => {
assert!(n < u32::MAX as usize);
Self(n as u32)
}
None => Self(u32::MAX),
}
}
pub fn as_opt_usize(&self) -> Option<usize> {
if self.0 == u32::MAX { None } else { Some(self.0 as usize) }
}
}
impl fmt::Debug for DotDotPos {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.as_opt_usize().fmt(f)
}
}
#[derive(Debug, HashStable_Generic)]
pub enum PatKind<'hir> {
Wild,
Binding(BindingAnnotation, HirId, Ident, Option<&'hir Pat<'hir>>),
Struct(QPath<'hir>, &'hir [PatField<'hir>], bool),
TupleStruct(QPath<'hir>, &'hir [Pat<'hir>], DotDotPos),
Or(&'hir [Pat<'hir>]),
Path(QPath<'hir>),
Tuple(&'hir [Pat<'hir>], DotDotPos),
Box(&'hir Pat<'hir>),
Ref(&'hir Pat<'hir>, Mutability),
Lit(&'hir Expr<'hir>),
Range(Option<&'hir Expr<'hir>>, Option<&'hir Expr<'hir>>, RangeEnd),
Slice(&'hir [Pat<'hir>], Option<&'hir Pat<'hir>>, &'hir [Pat<'hir>]),
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum BinOpKind {
Add,
Sub,
Mul,
Div,
Rem,
And,
Or,
BitXor,
BitAnd,
BitOr,
Shl,
Shr,
Eq,
Lt,
Le,
Ne,
Ge,
Gt,
}
impl BinOpKind {
pub fn as_str(self) -> &'static str {
match self {
BinOpKind::Add => "+",
BinOpKind::Sub => "-",
BinOpKind::Mul => "*",
BinOpKind::Div => "/",
BinOpKind::Rem => "%",
BinOpKind::And => "&&",
BinOpKind::Or => "||",
BinOpKind::BitXor => "^",
BinOpKind::BitAnd => "&",
BinOpKind::BitOr => "|",
BinOpKind::Shl => "<<",
BinOpKind::Shr => ">>",
BinOpKind::Eq => "==",
BinOpKind::Lt => "<",
BinOpKind::Le => "<=",
BinOpKind::Ne => "!=",
BinOpKind::Ge => ">=",
BinOpKind::Gt => ">",
}
}
pub fn is_lazy(self) -> bool {
matches!(self, BinOpKind::And | BinOpKind::Or)
}
pub fn is_shift(self) -> bool {
matches!(self, BinOpKind::Shl | BinOpKind::Shr)
}
pub fn is_comparison(self) -> bool {
match self {
BinOpKind::Eq
| BinOpKind::Lt
| BinOpKind::Le
| BinOpKind::Ne
| BinOpKind::Gt
| BinOpKind::Ge => true,
BinOpKind::And
| BinOpKind::Or
| BinOpKind::Add
| BinOpKind::Sub
| BinOpKind::Mul
| BinOpKind::Div
| BinOpKind::Rem
| BinOpKind::BitXor
| BinOpKind::BitAnd
| BinOpKind::BitOr
| BinOpKind::Shl
| BinOpKind::Shr => false,
}
}
pub fn is_by_value(self) -> bool {
!self.is_comparison()
}
}
impl Into<ast::BinOpKind> for BinOpKind {
fn into(self) -> ast::BinOpKind {
match self {
BinOpKind::Add => ast::BinOpKind::Add,
BinOpKind::Sub => ast::BinOpKind::Sub,
BinOpKind::Mul => ast::BinOpKind::Mul,
BinOpKind::Div => ast::BinOpKind::Div,
BinOpKind::Rem => ast::BinOpKind::Rem,
BinOpKind::And => ast::BinOpKind::And,
BinOpKind::Or => ast::BinOpKind::Or,
BinOpKind::BitXor => ast::BinOpKind::BitXor,
BinOpKind::BitAnd => ast::BinOpKind::BitAnd,
BinOpKind::BitOr => ast::BinOpKind::BitOr,
BinOpKind::Shl => ast::BinOpKind::Shl,
BinOpKind::Shr => ast::BinOpKind::Shr,
BinOpKind::Eq => ast::BinOpKind::Eq,
BinOpKind::Lt => ast::BinOpKind::Lt,
BinOpKind::Le => ast::BinOpKind::Le,
BinOpKind::Ne => ast::BinOpKind::Ne,
BinOpKind::Ge => ast::BinOpKind::Ge,
BinOpKind::Gt => ast::BinOpKind::Gt,
}
}
}
pub type BinOp = Spanned<BinOpKind>;
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum UnOp {
Deref,
Not,
Neg,
}
impl UnOp {
pub fn as_str(self) -> &'static str {
match self {
Self::Deref => "*",
Self::Not => "!",
Self::Neg => "-",
}
}
pub fn is_by_value(self) -> bool {
matches!(self, Self::Neg | Self::Not)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct Stmt<'hir> {
pub hir_id: HirId,
pub kind: StmtKind<'hir>,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub enum StmtKind<'hir> {
Local(&'hir Local<'hir>),
Item(ItemId),
Expr(&'hir Expr<'hir>),
Semi(&'hir Expr<'hir>),
}
#[derive(Debug, HashStable_Generic)]
pub struct Local<'hir> {
pub pat: &'hir Pat<'hir>,
pub ty: Option<&'hir Ty<'hir>>,
pub init: Option<&'hir Expr<'hir>>,
pub els: Option<&'hir Block<'hir>>,
pub hir_id: HirId,
pub span: Span,
pub source: LocalSource,
}
#[derive(Debug, HashStable_Generic)]
pub struct Arm<'hir> {
#[stable_hasher(ignore)]
pub hir_id: HirId,
pub span: Span,
pub pat: &'hir Pat<'hir>,
pub guard: Option<Guard<'hir>>,
pub body: &'hir Expr<'hir>,
}
#[derive(Debug, HashStable_Generic)]
pub struct Let<'hir> {
pub hir_id: HirId,
pub span: Span,
pub pat: &'hir Pat<'hir>,
pub ty: Option<&'hir Ty<'hir>>,
pub init: &'hir Expr<'hir>,
}
#[derive(Debug, HashStable_Generic)]
pub enum Guard<'hir> {
If(&'hir Expr<'hir>),
IfLet(&'hir Let<'hir>),
}
impl<'hir> Guard<'hir> {
pub fn body(&self) -> &'hir Expr<'hir> {
match self {
Guard::If(e) | Guard::IfLet(Let { init: e, .. }) => e,
}
}
}
#[derive(Debug, HashStable_Generic)]
pub struct ExprField<'hir> {
#[stable_hasher(ignore)]
pub hir_id: HirId,
pub ident: Ident,
pub expr: &'hir Expr<'hir>,
pub span: Span,
pub is_shorthand: bool,
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum BlockCheckMode {
DefaultBlock,
UnsafeBlock(UnsafeSource),
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum UnsafeSource {
CompilerGenerated,
UserProvided,
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Hash, Debug)]
pub struct BodyId {
pub hir_id: HirId,
}
#[derive(Debug, HashStable_Generic)]
pub struct Body<'hir> {
pub params: &'hir [Param<'hir>],
pub value: &'hir Expr<'hir>,
pub generator_kind: Option<GeneratorKind>,
}
impl<'hir> Body<'hir> {
pub fn id(&self) -> BodyId {
BodyId { hir_id: self.value.hir_id }
}
pub fn generator_kind(&self) -> Option<GeneratorKind> {
self.generator_kind
}
}
#[derive(Clone, PartialEq, PartialOrd, Eq, Hash, Debug, Copy)]
#[derive(HashStable_Generic, Encodable, Decodable)]
pub enum GeneratorKind {
Async(AsyncGeneratorKind),
Gen,
}
impl fmt::Display for GeneratorKind {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
GeneratorKind::Async(k) => fmt::Display::fmt(k, f),
GeneratorKind::Gen => f.write_str("generator"),
}
}
}
impl GeneratorKind {
pub fn descr(&self) -> &'static str {
match self {
GeneratorKind::Async(ask) => ask.descr(),
GeneratorKind::Gen => "generator",
}
}
}
#[derive(Clone, PartialEq, PartialOrd, Eq, Hash, Debug, Copy)]
#[derive(HashStable_Generic, Encodable, Decodable)]
pub enum AsyncGeneratorKind {
Block,
Closure,
Fn,
}
impl fmt::Display for AsyncGeneratorKind {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match self {
AsyncGeneratorKind::Block => "async block",
AsyncGeneratorKind::Closure => "async closure body",
AsyncGeneratorKind::Fn => "async fn body",
})
}
}
impl AsyncGeneratorKind {
pub fn descr(&self) -> &'static str {
match self {
AsyncGeneratorKind::Block => "`async` block",
AsyncGeneratorKind::Closure => "`async` closure body",
AsyncGeneratorKind::Fn => "`async fn` body",
}
}
}
#[derive(Copy, Clone, Debug)]
pub enum BodyOwnerKind {
Fn,
Closure,
Const,
Static(Mutability),
}
impl BodyOwnerKind {
pub fn is_fn_or_closure(self) -> bool {
match self {
BodyOwnerKind::Fn | BodyOwnerKind::Closure => true,
BodyOwnerKind::Const | BodyOwnerKind::Static(_) => false,
}
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum ConstContext {
ConstFn,
Static(Mutability),
Const,
}
impl ConstContext {
pub fn keyword_name(self) -> &'static str {
match self {
Self::Const => "const",
Self::Static(Mutability::Not) => "static",
Self::Static(Mutability::Mut) => "static mut",
Self::ConstFn => "const fn",
}
}
}
impl fmt::Display for ConstContext {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
Self::Const => write!(f, "constant"),
Self::Static(_) => write!(f, "static"),
Self::ConstFn => write!(f, "constant function"),
}
}
}
pub type Lit = Spanned<LitKind>;
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Debug, HashStable_Generic)]
pub enum ArrayLen {
Infer(HirId, Span),
Body(AnonConst),
}
impl ArrayLen {
pub fn hir_id(&self) -> HirId {
match self {
&ArrayLen::Infer(hir_id, _) | &ArrayLen::Body(AnonConst { hir_id, .. }) => hir_id,
}
}
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Debug, HashStable_Generic)]
pub struct AnonConst {
pub hir_id: HirId,
pub def_id: LocalDefId,
pub body: BodyId,
}
#[derive(Debug, HashStable_Generic)]
pub struct Expr<'hir> {
pub hir_id: HirId,
pub kind: ExprKind<'hir>,
pub span: Span,
}
impl Expr<'_> {
pub fn precedence(&self) -> ExprPrecedence {
match self.kind {
ExprKind::Box(_) => ExprPrecedence::Box,
ExprKind::ConstBlock(_) => ExprPrecedence::ConstBlock,
ExprKind::Array(_) => ExprPrecedence::Array,
ExprKind::Call(..) => ExprPrecedence::Call,
ExprKind::MethodCall(..) => ExprPrecedence::MethodCall,
ExprKind::Tup(_) => ExprPrecedence::Tup,
ExprKind::Binary(op, ..) => ExprPrecedence::Binary(op.node.into()),
ExprKind::Unary(..) => ExprPrecedence::Unary,
ExprKind::Lit(_) => ExprPrecedence::Lit,
ExprKind::Type(..) | ExprKind::Cast(..) => ExprPrecedence::Cast,
ExprKind::DropTemps(ref expr, ..) => expr.precedence(),
ExprKind::If(..) => ExprPrecedence::If,
ExprKind::Let(..) => ExprPrecedence::Let,
ExprKind::Loop(..) => ExprPrecedence::Loop,
ExprKind::Match(..) => ExprPrecedence::Match,
ExprKind::Closure { .. } => ExprPrecedence::Closure,
ExprKind::Block(..) => ExprPrecedence::Block,
ExprKind::Assign(..) => ExprPrecedence::Assign,
ExprKind::AssignOp(..) => ExprPrecedence::AssignOp,
ExprKind::Field(..) => ExprPrecedence::Field,
ExprKind::Index(..) => ExprPrecedence::Index,
ExprKind::Path(..) => ExprPrecedence::Path,
ExprKind::AddrOf(..) => ExprPrecedence::AddrOf,
ExprKind::Break(..) => ExprPrecedence::Break,
ExprKind::Continue(..) => ExprPrecedence::Continue,
ExprKind::Ret(..) => ExprPrecedence::Ret,
ExprKind::InlineAsm(..) => ExprPrecedence::InlineAsm,
ExprKind::Struct(..) => ExprPrecedence::Struct,
ExprKind::Repeat(..) => ExprPrecedence::Repeat,
ExprKind::Yield(..) => ExprPrecedence::Yield,
ExprKind::Err => ExprPrecedence::Err,
}
}
pub fn is_syntactic_place_expr(&self) -> bool {
self.is_place_expr(|_| true)
}
pub fn is_place_expr(&self, mut allow_projections_from: impl FnMut(&Self) -> bool) -> bool {
match self.kind {
ExprKind::Path(QPath::Resolved(_, ref path)) => {
matches!(path.res, Res::Local(..) | Res::Def(DefKind::Static(_), _) | Res::Err)
}
ExprKind::Type(ref e, _) => e.is_place_expr(allow_projections_from),
ExprKind::Unary(UnOp::Deref, _) => true,
ExprKind::Field(ref base, _) | ExprKind::Index(ref base, _) => {
allow_projections_from(base) || base.is_place_expr(allow_projections_from)
}
ExprKind::Path(QPath::LangItem(..)) => false,
ExprKind::Path(QPath::TypeRelative(..))
| ExprKind::Call(..)
| ExprKind::MethodCall(..)
| ExprKind::Struct(..)
| ExprKind::Tup(..)
| ExprKind::If(..)
| ExprKind::Match(..)
| ExprKind::Closure { .. }
| ExprKind::Block(..)
| ExprKind::Repeat(..)
| ExprKind::Array(..)
| ExprKind::Break(..)
| ExprKind::Continue(..)
| ExprKind::Ret(..)
| ExprKind::Let(..)
| ExprKind::Loop(..)
| ExprKind::Assign(..)
| ExprKind::InlineAsm(..)
| ExprKind::AssignOp(..)
| ExprKind::Lit(_)
| ExprKind::ConstBlock(..)
| ExprKind::Unary(..)
| ExprKind::Box(..)
| ExprKind::AddrOf(..)
| ExprKind::Binary(..)
| ExprKind::Yield(..)
| ExprKind::Cast(..)
| ExprKind::DropTemps(..)
| ExprKind::Err => false,
}
}
pub fn peel_drop_temps(&self) -> &Self {
let mut expr = self;
while let ExprKind::DropTemps(inner) = &expr.kind {
expr = inner;
}
expr
}
pub fn peel_blocks(&self) -> &Self {
let mut expr = self;
while let ExprKind::Block(Block { expr: Some(inner), .. }, _) = &expr.kind {
expr = inner;
}
expr
}
pub fn can_have_side_effects(&self) -> bool {
match self.peel_drop_temps().kind {
ExprKind::Path(_) | ExprKind::Lit(_) => false,
ExprKind::Type(base, _)
| ExprKind::Unary(_, base)
| ExprKind::Field(base, _)
| ExprKind::Index(base, _)
| ExprKind::AddrOf(.., base)
| ExprKind::Cast(base, _) => {
base.can_have_side_effects()
}
ExprKind::Struct(_, fields, init) => fields
.iter()
.map(|field| field.expr)
.chain(init.into_iter())
.all(|e| e.can_have_side_effects()),
ExprKind::Array(args)
| ExprKind::Tup(args)
| ExprKind::Call(
Expr {
kind:
ExprKind::Path(QPath::Resolved(
None,
Path { res: Res::Def(DefKind::Ctor(_, CtorKind::Fn), _), .. },
)),
..
},
args,
) => args.iter().all(|arg| arg.can_have_side_effects()),
ExprKind::If(..)
| ExprKind::Match(..)
| ExprKind::MethodCall(..)
| ExprKind::Call(..)
| ExprKind::Closure { .. }
| ExprKind::Block(..)
| ExprKind::Repeat(..)
| ExprKind::Break(..)
| ExprKind::Continue(..)
| ExprKind::Ret(..)
| ExprKind::Let(..)
| ExprKind::Loop(..)
| ExprKind::Assign(..)
| ExprKind::InlineAsm(..)
| ExprKind::AssignOp(..)
| ExprKind::ConstBlock(..)
| ExprKind::Box(..)
| ExprKind::Binary(..)
| ExprKind::Yield(..)
| ExprKind::DropTemps(..)
| ExprKind::Err => true,
}
}
pub fn is_approximately_pattern(&self) -> bool {
match &self.kind {
ExprKind::Box(_)
| ExprKind::Array(_)
| ExprKind::Call(..)
| ExprKind::Tup(_)
| ExprKind::Lit(_)
| ExprKind::Path(_)
| ExprKind::Struct(..) => true,
_ => false,
}
}
pub fn method_ident(&self) -> Option<Ident> {
match self.kind {
ExprKind::MethodCall(receiver_method, ..) => Some(receiver_method.ident),
ExprKind::Unary(_, expr) | ExprKind::AddrOf(.., expr) => expr.method_ident(),
_ => None,
}
}
}
pub fn is_range_literal(expr: &Expr<'_>) -> bool {
match expr.kind {
ExprKind::Struct(ref qpath, _, _) => matches!(
**qpath,
QPath::LangItem(
LangItem::Range
| LangItem::RangeTo
| LangItem::RangeFrom
| LangItem::RangeFull
| LangItem::RangeToInclusive,
..
)
),
ExprKind::Call(ref func, _) => {
matches!(func.kind, ExprKind::Path(QPath::LangItem(LangItem::RangeInclusiveNew, ..)))
}
_ => false,
}
}
#[derive(Debug, HashStable_Generic)]
pub enum ExprKind<'hir> {
Box(&'hir Expr<'hir>),
ConstBlock(AnonConst),
Array(&'hir [Expr<'hir>]),
Call(&'hir Expr<'hir>, &'hir [Expr<'hir>]),
MethodCall(&'hir PathSegment<'hir>, &'hir Expr<'hir>, &'hir [Expr<'hir>], Span),
Tup(&'hir [Expr<'hir>]),
Binary(BinOp, &'hir Expr<'hir>, &'hir Expr<'hir>),
Unary(UnOp, &'hir Expr<'hir>),
Lit(Lit),
Cast(&'hir Expr<'hir>, &'hir Ty<'hir>),
Type(&'hir Expr<'hir>, &'hir Ty<'hir>),
DropTemps(&'hir Expr<'hir>),
Let(&'hir Let<'hir>),
If(&'hir Expr<'hir>, &'hir Expr<'hir>, Option<&'hir Expr<'hir>>),
Loop(&'hir Block<'hir>, Option<Label>, LoopSource, Span),
Match(&'hir Expr<'hir>, &'hir [Arm<'hir>], MatchSource),
Closure(&'hir Closure<'hir>),
Block(&'hir Block<'hir>, Option<Label>),
Assign(&'hir Expr<'hir>, &'hir Expr<'hir>, Span),
AssignOp(BinOp, &'hir Expr<'hir>, &'hir Expr<'hir>),
Field(&'hir Expr<'hir>, Ident),
Index(&'hir Expr<'hir>, &'hir Expr<'hir>),
Path(QPath<'hir>),
AddrOf(BorrowKind, Mutability, &'hir Expr<'hir>),
Break(Destination, Option<&'hir Expr<'hir>>),
Continue(Destination),
Ret(Option<&'hir Expr<'hir>>),
InlineAsm(&'hir InlineAsm<'hir>),
Struct(&'hir QPath<'hir>, &'hir [ExprField<'hir>], Option<&'hir Expr<'hir>>),
Repeat(&'hir Expr<'hir>, ArrayLen),
Yield(&'hir Expr<'hir>, YieldSource),
Err,
}
#[derive(Debug, HashStable_Generic)]
pub enum QPath<'hir> {
Resolved(Option<&'hir Ty<'hir>>, &'hir Path<'hir>),
TypeRelative(&'hir Ty<'hir>, &'hir PathSegment<'hir>),
LangItem(LangItem, Span, Option<HirId>),
}
impl<'hir> QPath<'hir> {
pub fn span(&self) -> Span {
match *self {
QPath::Resolved(_, path) => path.span,
QPath::TypeRelative(qself, ps) => qself.span.to(ps.ident.span),
QPath::LangItem(_, span, _) => span,
}
}
pub fn qself_span(&self) -> Span {
match *self {
QPath::Resolved(_, path) => path.span,
QPath::TypeRelative(qself, _) => qself.span,
QPath::LangItem(_, span, _) => span,
}
}
pub fn last_segment_span(&self) -> Span {
match *self {
QPath::Resolved(_, path) => path.segments.last().unwrap().ident.span,
QPath::TypeRelative(_, segment) => segment.ident.span,
QPath::LangItem(_, span, _) => span,
}
}
}
#[derive(Copy, Clone, Encodable, Debug, HashStable_Generic)]
pub enum LocalSource {
Normal,
AsyncFn,
AwaitDesugar,
AssignDesugar(Span),
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Hash, Debug)]
#[derive(HashStable_Generic)]
pub enum MatchSource {
Normal,
ForLoopDesugar,
TryDesugar,
AwaitDesugar,
}
impl MatchSource {
#[inline]
pub const fn name(self) -> &'static str {
use MatchSource::*;
match self {
Normal => "match",
ForLoopDesugar => "for",
TryDesugar => "?",
AwaitDesugar => ".await",
}
}
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum LoopSource {
Loop,
While,
ForLoop,
}
impl LoopSource {
pub fn name(self) -> &'static str {
match self {
LoopSource::Loop => "loop",
LoopSource::While => "while",
LoopSource::ForLoop => "for",
}
}
}
#[derive(Copy, Clone, Encodable, Debug, HashStable_Generic)]
pub enum LoopIdError {
OutsideLoopScope,
UnlabeledCfInWhileCondition,
UnresolvedLabel,
}
impl fmt::Display for LoopIdError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match self {
LoopIdError::OutsideLoopScope => "not inside loop scope",
LoopIdError::UnlabeledCfInWhileCondition => {
"unlabeled control flow (break or continue) in while condition"
}
LoopIdError::UnresolvedLabel => "label not found",
})
}
}
#[derive(Copy, Clone, Encodable, Debug, HashStable_Generic)]
pub struct Destination {
pub label: Option<Label>,
pub target_id: Result<HirId, LoopIdError>,
}
#[derive(Copy, Clone, PartialEq, Eq, Debug, Encodable, Decodable, HashStable_Generic)]
pub enum YieldSource {
Await { expr: Option<HirId> },
Yield,
}
impl YieldSource {
pub fn is_await(&self) -> bool {
matches!(self, YieldSource::Await { .. })
}
}
impl fmt::Display for YieldSource {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match self {
YieldSource::Await { .. } => "`await`",
YieldSource::Yield => "`yield`",
})
}
}
impl From<GeneratorKind> for YieldSource {
fn from(kind: GeneratorKind) -> Self {
match kind {
GeneratorKind::Gen => Self::Yield,
GeneratorKind::Async(_) => Self::Await { expr: None },
}
}
}
#[derive(Debug, HashStable_Generic)]
pub struct MutTy<'hir> {
pub ty: &'hir Ty<'hir>,
pub mutbl: Mutability,
}
#[derive(Debug, HashStable_Generic)]
pub struct FnSig<'hir> {
pub header: FnHeader,
pub decl: &'hir FnDecl<'hir>,
pub span: Span,
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, HashStable_Generic)]
pub struct TraitItemId {
pub owner_id: OwnerId,
}
impl TraitItemId {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct TraitItem<'hir> {
pub ident: Ident,
pub owner_id: OwnerId,
pub generics: &'hir Generics<'hir>,
pub kind: TraitItemKind<'hir>,
pub span: Span,
pub defaultness: Defaultness,
}
impl TraitItem<'_> {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
pub fn trait_item_id(&self) -> TraitItemId {
TraitItemId { owner_id: self.owner_id }
}
}
#[derive(Encodable, Debug, HashStable_Generic)]
pub enum TraitFn<'hir> {
Required(&'hir [Ident]),
Provided(BodyId),
}
#[derive(Debug, HashStable_Generic)]
pub enum TraitItemKind<'hir> {
Const(&'hir Ty<'hir>, Option<BodyId>),
Fn(FnSig<'hir>, TraitFn<'hir>),
Type(GenericBounds<'hir>, Option<&'hir Ty<'hir>>),
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, HashStable_Generic)]
pub struct ImplItemId {
pub owner_id: OwnerId,
}
impl ImplItemId {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct ImplItem<'hir> {
pub ident: Ident,
pub owner_id: OwnerId,
pub generics: &'hir Generics<'hir>,
pub kind: ImplItemKind<'hir>,
pub defaultness: Defaultness,
pub span: Span,
pub vis_span: Span,
}
impl ImplItem<'_> {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
pub fn impl_item_id(&self) -> ImplItemId {
ImplItemId { owner_id: self.owner_id }
}
}
#[derive(Debug, HashStable_Generic)]
pub enum ImplItemKind<'hir> {
Const(&'hir Ty<'hir>, BodyId),
Fn(FnSig<'hir>, BodyId),
Type(&'hir Ty<'hir>),
}
pub const FN_OUTPUT_NAME: Symbol = sym::Output;
#[derive(Debug, HashStable_Generic)]
pub struct TypeBinding<'hir> {
pub hir_id: HirId,
pub ident: Ident,
pub gen_args: &'hir GenericArgs<'hir>,
pub kind: TypeBindingKind<'hir>,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub enum Term<'hir> {
Ty(&'hir Ty<'hir>),
Const(AnonConst),
}
impl<'hir> From<&'hir Ty<'hir>> for Term<'hir> {
fn from(ty: &'hir Ty<'hir>) -> Self {
Term::Ty(ty)
}
}
impl<'hir> From<AnonConst> for Term<'hir> {
fn from(c: AnonConst) -> Self {
Term::Const(c)
}
}
#[derive(Debug, HashStable_Generic)]
pub enum TypeBindingKind<'hir> {
Constraint { bounds: &'hir [GenericBound<'hir>] },
Equality { term: Term<'hir> },
}
impl TypeBinding<'_> {
pub fn ty(&self) -> &Ty<'_> {
match self.kind {
TypeBindingKind::Equality { term: Term::Ty(ref ty) } => ty,
_ => panic!("expected equality type binding for parenthesized generic args"),
}
}
pub fn opt_const(&self) -> Option<&'_ AnonConst> {
match self.kind {
TypeBindingKind::Equality { term: Term::Const(ref c) } => Some(c),
_ => None,
}
}
}
#[derive(Debug, HashStable_Generic)]
pub struct Ty<'hir> {
pub hir_id: HirId,
pub kind: TyKind<'hir>,
pub span: Span,
}
impl<'hir> Ty<'hir> {
pub fn as_generic_param(&self) -> Option<(DefId, Ident)> {
let TyKind::Path(QPath::Resolved(None, path)) = self.kind else {
return None;
};
let [segment] = &path.segments else {
return None;
};
match path.res {
Res::Def(DefKind::TyParam, def_id) | Res::SelfTyParam { trait_: def_id } => {
Some((def_id, segment.ident))
}
_ => None,
}
}
pub fn peel_refs(&self) -> &Self {
let mut final_ty = self;
while let TyKind::Rptr(_, MutTy { ty, .. }) = &final_ty.kind {
final_ty = ty;
}
final_ty
}
pub fn find_self_aliases(&self) -> Vec<Span> {
use crate::intravisit::Visitor;
struct MyVisitor(Vec<Span>);
impl<'v> Visitor<'v> for MyVisitor {
fn visit_ty(&mut self, t: &'v Ty<'v>) {
if matches!(
&t.kind,
TyKind::Path(QPath::Resolved(
_,
Path { res: crate::def::Res::SelfTyAlias { .. }, .. },
))
) {
self.0.push(t.span);
return;
}
crate::intravisit::walk_ty(self, t);
}
}
let mut my_visitor = MyVisitor(vec![]);
my_visitor.visit_ty(self);
my_visitor.0
}
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Hash, Debug)]
#[derive(HashStable_Generic)]
pub enum PrimTy {
Int(IntTy),
Uint(UintTy),
Float(FloatTy),
Str,
Bool,
Char,
}
impl PrimTy {
pub const ALL: [Self; 17] = [
Self::Int(IntTy::I8),
Self::Int(IntTy::I16),
Self::Int(IntTy::I32),
Self::Int(IntTy::I64),
Self::Int(IntTy::I128),
Self::Int(IntTy::Isize),
Self::Uint(UintTy::U8),
Self::Uint(UintTy::U16),
Self::Uint(UintTy::U32),
Self::Uint(UintTy::U64),
Self::Uint(UintTy::U128),
Self::Uint(UintTy::Usize),
Self::Float(FloatTy::F32),
Self::Float(FloatTy::F64),
Self::Bool,
Self::Char,
Self::Str,
];
pub fn name_str(self) -> &'static str {
match self {
PrimTy::Int(i) => i.name_str(),
PrimTy::Uint(u) => u.name_str(),
PrimTy::Float(f) => f.name_str(),
PrimTy::Str => "str",
PrimTy::Bool => "bool",
PrimTy::Char => "char",
}
}
pub fn name(self) -> Symbol {
match self {
PrimTy::Int(i) => i.name(),
PrimTy::Uint(u) => u.name(),
PrimTy::Float(f) => f.name(),
PrimTy::Str => sym::str,
PrimTy::Bool => sym::bool,
PrimTy::Char => sym::char,
}
}
pub fn from_name(name: Symbol) -> Option<Self> {
let ty = match name {
sym::i8 => Self::Int(IntTy::I8),
sym::i16 => Self::Int(IntTy::I16),
sym::i32 => Self::Int(IntTy::I32),
sym::i64 => Self::Int(IntTy::I64),
sym::i128 => Self::Int(IntTy::I128),
sym::isize => Self::Int(IntTy::Isize),
sym::u8 => Self::Uint(UintTy::U8),
sym::u16 => Self::Uint(UintTy::U16),
sym::u32 => Self::Uint(UintTy::U32),
sym::u64 => Self::Uint(UintTy::U64),
sym::u128 => Self::Uint(UintTy::U128),
sym::usize => Self::Uint(UintTy::Usize),
sym::f32 => Self::Float(FloatTy::F32),
sym::f64 => Self::Float(FloatTy::F64),
sym::bool => Self::Bool,
sym::char => Self::Char,
sym::str => Self::Str,
_ => return None,
};
Some(ty)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct BareFnTy<'hir> {
pub unsafety: Unsafety,
pub abi: Abi,
pub generic_params: &'hir [GenericParam<'hir>],
pub decl: &'hir FnDecl<'hir>,
pub param_names: &'hir [Ident],
}
#[derive(Debug, HashStable_Generic)]
pub struct OpaqueTy<'hir> {
pub generics: &'hir Generics<'hir>,
pub bounds: GenericBounds<'hir>,
pub origin: OpaqueTyOrigin,
pub in_trait: bool,
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, HashStable_Generic)]
pub enum OpaqueTyOrigin {
FnReturn(LocalDefId),
AsyncFn(LocalDefId),
TyAlias,
}
#[derive(Debug, HashStable_Generic)]
pub enum TyKind<'hir> {
Slice(&'hir Ty<'hir>),
Array(&'hir Ty<'hir>, ArrayLen),
Ptr(MutTy<'hir>),
Rptr(&'hir Lifetime, MutTy<'hir>),
BareFn(&'hir BareFnTy<'hir>),
Never,
Tup(&'hir [Ty<'hir>]),
Path(QPath<'hir>),
OpaqueDef(ItemId, &'hir [GenericArg<'hir>], bool),
TraitObject(&'hir [PolyTraitRef<'hir>], &'hir Lifetime, TraitObjectSyntax),
Typeof(AnonConst),
Infer,
Err,
}
#[derive(Debug, HashStable_Generic)]
pub enum InlineAsmOperand<'hir> {
In {
reg: InlineAsmRegOrRegClass,
expr: &'hir Expr<'hir>,
},
Out {
reg: InlineAsmRegOrRegClass,
late: bool,
expr: Option<&'hir Expr<'hir>>,
},
InOut {
reg: InlineAsmRegOrRegClass,
late: bool,
expr: &'hir Expr<'hir>,
},
SplitInOut {
reg: InlineAsmRegOrRegClass,
late: bool,
in_expr: &'hir Expr<'hir>,
out_expr: Option<&'hir Expr<'hir>>,
},
Const {
anon_const: AnonConst,
},
SymFn {
anon_const: AnonConst,
},
SymStatic {
path: QPath<'hir>,
def_id: DefId,
},
}
impl<'hir> InlineAsmOperand<'hir> {
pub fn reg(&self) -> Option<InlineAsmRegOrRegClass> {
match *self {
Self::In { reg, .. }
| Self::Out { reg, .. }
| Self::InOut { reg, .. }
| Self::SplitInOut { reg, .. } => Some(reg),
Self::Const { .. } | Self::SymFn { .. } | Self::SymStatic { .. } => None,
}
}
pub fn is_clobber(&self) -> bool {
matches!(
self,
InlineAsmOperand::Out { reg: InlineAsmRegOrRegClass::Reg(_), late: _, expr: None }
)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct InlineAsm<'hir> {
pub template: &'hir [InlineAsmTemplatePiece],
pub template_strs: &'hir [(Symbol, Option<Symbol>, Span)],
pub operands: &'hir [(InlineAsmOperand<'hir>, Span)],
pub options: InlineAsmOptions,
pub line_spans: &'hir [Span],
}
#[derive(Debug, HashStable_Generic)]
pub struct Param<'hir> {
pub hir_id: HirId,
pub pat: &'hir Pat<'hir>,
pub ty_span: Span,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub struct FnDecl<'hir> {
pub inputs: &'hir [Ty<'hir>],
pub output: FnRetTy<'hir>,
pub c_variadic: bool,
pub implicit_self: ImplicitSelfKind,
pub lifetime_elision_allowed: bool,
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, HashStable_Generic)]
pub enum ImplicitSelfKind {
Imm,
Mut,
ImmRef,
MutRef,
None,
}
impl ImplicitSelfKind {
pub fn has_implicit_self(&self) -> bool {
!matches!(*self, ImplicitSelfKind::None)
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Encodable, Decodable, Debug)]
#[derive(HashStable_Generic)]
pub enum IsAsync {
Async,
NotAsync,
}
impl IsAsync {
pub fn is_async(self) -> bool {
self == IsAsync::Async
}
}
#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, Encodable, Decodable, HashStable_Generic)]
pub enum Defaultness {
Default { has_value: bool },
Final,
}
impl Defaultness {
pub fn has_value(&self) -> bool {
match *self {
Defaultness::Default { has_value } => has_value,
Defaultness::Final => true,
}
}
pub fn is_final(&self) -> bool {
*self == Defaultness::Final
}
pub fn is_default(&self) -> bool {
matches!(*self, Defaultness::Default { .. })
}
}
#[derive(Debug, HashStable_Generic)]
pub enum FnRetTy<'hir> {
DefaultReturn(Span),
Return(&'hir Ty<'hir>),
}
impl FnRetTy<'_> {
#[inline]
pub fn span(&self) -> Span {
match *self {
Self::DefaultReturn(span) => span,
Self::Return(ref ty) => ty.span,
}
}
}
#[derive(Copy, Clone, Debug, HashStable_Generic)]
pub enum ClosureBinder {
Default,
For { span: Span },
}
#[derive(Encodable, Debug, HashStable_Generic)]
pub struct Mod<'hir> {
pub spans: ModSpans,
pub item_ids: &'hir [ItemId],
}
#[derive(Copy, Clone, Debug, HashStable_Generic, Encodable)]
pub struct ModSpans {
pub inner_span: Span,
pub inject_use_span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub struct EnumDef<'hir> {
pub variants: &'hir [Variant<'hir>],
}
#[derive(Debug, HashStable_Generic)]
pub struct Variant<'hir> {
pub ident: Ident,
pub hir_id: HirId,
pub def_id: LocalDefId,
pub data: VariantData<'hir>,
pub disr_expr: Option<AnonConst>,
pub span: Span,
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum UseKind {
Single,
Glob,
ListStem,
}
#[derive(Clone, Debug, HashStable_Generic)]
pub struct TraitRef<'hir> {
pub path: &'hir Path<'hir>,
#[stable_hasher(ignore)]
pub hir_ref_id: HirId,
}
impl TraitRef<'_> {
pub fn trait_def_id(&self) -> Option<DefId> {
match self.path.res {
Res::Def(DefKind::Trait | DefKind::TraitAlias, did) => Some(did),
Res::Err => None,
_ => unreachable!(),
}
}
}
#[derive(Clone, Debug, HashStable_Generic)]
pub struct PolyTraitRef<'hir> {
pub bound_generic_params: &'hir [GenericParam<'hir>],
pub trait_ref: TraitRef<'hir>,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub struct FieldDef<'hir> {
pub span: Span,
pub vis_span: Span,
pub ident: Ident,
pub hir_id: HirId,
pub def_id: LocalDefId,
pub ty: &'hir Ty<'hir>,
}
impl FieldDef<'_> {
pub fn is_positional(&self) -> bool {
let first = self.ident.as_str().as_bytes()[0];
(b'0'..=b'9').contains(&first)
}
}
#[derive(Debug, HashStable_Generic)]
pub enum VariantData<'hir> {
Struct(&'hir [FieldDef<'hir>], bool),
Tuple(&'hir [FieldDef<'hir>], HirId, LocalDefId),
Unit(HirId, LocalDefId),
}
impl<'hir> VariantData<'hir> {
pub fn fields(&self) -> &'hir [FieldDef<'hir>] {
match *self {
VariantData::Struct(ref fields, ..) | VariantData::Tuple(ref fields, ..) => fields,
_ => &[],
}
}
pub fn ctor(&self) -> Option<(CtorKind, HirId, LocalDefId)> {
match *self {
VariantData::Tuple(_, hir_id, def_id) => Some((CtorKind::Fn, hir_id, def_id)),
VariantData::Unit(hir_id, def_id) => Some((CtorKind::Const, hir_id, def_id)),
VariantData::Struct(..) => None,
}
}
#[inline]
pub fn ctor_kind(&self) -> Option<CtorKind> {
self.ctor().map(|(kind, ..)| kind)
}
#[inline]
pub fn ctor_hir_id(&self) -> Option<HirId> {
self.ctor().map(|(_, hir_id, _)| hir_id)
}
#[inline]
pub fn ctor_def_id(&self) -> Option<LocalDefId> {
self.ctor().map(|(.., def_id)| def_id)
}
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, Hash, HashStable_Generic)]
pub struct ItemId {
pub owner_id: OwnerId,
}
impl ItemId {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct Item<'hir> {
pub ident: Ident,
pub owner_id: OwnerId,
pub kind: ItemKind<'hir>,
pub span: Span,
pub vis_span: Span,
}
impl Item<'_> {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
pub fn item_id(&self) -> ItemId {
ItemId { owner_id: self.owner_id }
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[derive(Encodable, Decodable, HashStable_Generic)]
pub enum Unsafety {
Unsafe,
Normal,
}
impl Unsafety {
pub fn prefix_str(&self) -> &'static str {
match self {
Self::Unsafe => "unsafe ",
Self::Normal => "",
}
}
}
impl fmt::Display for Unsafety {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match *self {
Self::Unsafe => "unsafe",
Self::Normal => "normal",
})
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[derive(Encodable, Decodable, HashStable_Generic)]
pub enum Constness {
Const,
NotConst,
}
impl fmt::Display for Constness {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match *self {
Self::Const => "const",
Self::NotConst => "non-const",
})
}
}
#[derive(Copy, Clone, Encodable, Debug, HashStable_Generic)]
pub struct FnHeader {
pub unsafety: Unsafety,
pub constness: Constness,
pub asyncness: IsAsync,
pub abi: Abi,
}
impl FnHeader {
pub fn is_async(&self) -> bool {
matches!(&self.asyncness, IsAsync::Async)
}
pub fn is_const(&self) -> bool {
matches!(&self.constness, Constness::Const)
}
pub fn is_unsafe(&self) -> bool {
matches!(&self.unsafety, Unsafety::Unsafe)
}
}
#[derive(Debug, HashStable_Generic)]
pub enum ItemKind<'hir> {
ExternCrate(Option<Symbol>),
Use(&'hir UsePath<'hir>, UseKind),
Static(&'hir Ty<'hir>, Mutability, BodyId),
Const(&'hir Ty<'hir>, BodyId),
Fn(FnSig<'hir>, &'hir Generics<'hir>, BodyId),
Macro(ast::MacroDef, MacroKind),
Mod(&'hir Mod<'hir>),
ForeignMod { abi: Abi, items: &'hir [ForeignItemRef] },
GlobalAsm(&'hir InlineAsm<'hir>),
TyAlias(&'hir Ty<'hir>, &'hir Generics<'hir>),
OpaqueTy(OpaqueTy<'hir>),
Enum(EnumDef<'hir>, &'hir Generics<'hir>),
Struct(VariantData<'hir>, &'hir Generics<'hir>),
Union(VariantData<'hir>, &'hir Generics<'hir>),
Trait(IsAuto, Unsafety, &'hir Generics<'hir>, GenericBounds<'hir>, &'hir [TraitItemRef]),
TraitAlias(&'hir Generics<'hir>, GenericBounds<'hir>),
Impl(&'hir Impl<'hir>),
}
#[derive(Debug, HashStable_Generic)]
pub struct Impl<'hir> {
pub unsafety: Unsafety,
pub polarity: ImplPolarity,
pub defaultness: Defaultness,
pub defaultness_span: Option<Span>,
pub constness: Constness,
pub generics: &'hir Generics<'hir>,
pub of_trait: Option<TraitRef<'hir>>,
pub self_ty: &'hir Ty<'hir>,
pub items: &'hir [ImplItemRef],
}
impl ItemKind<'_> {
pub fn generics(&self) -> Option<&Generics<'_>> {
Some(match *self {
ItemKind::Fn(_, ref generics, _)
| ItemKind::TyAlias(_, ref generics)
| ItemKind::OpaqueTy(OpaqueTy { ref generics, .. })
| ItemKind::Enum(_, ref generics)
| ItemKind::Struct(_, ref generics)
| ItemKind::Union(_, ref generics)
| ItemKind::Trait(_, _, ref generics, _, _)
| ItemKind::TraitAlias(ref generics, _)
| ItemKind::Impl(Impl { ref generics, .. }) => generics,
_ => return None,
})
}
pub fn descr(&self) -> &'static str {
match self {
ItemKind::ExternCrate(..) => "extern crate",
ItemKind::Use(..) => "`use` import",
ItemKind::Static(..) => "static item",
ItemKind::Const(..) => "constant item",
ItemKind::Fn(..) => "function",
ItemKind::Macro(..) => "macro",
ItemKind::Mod(..) => "module",
ItemKind::ForeignMod { .. } => "extern block",
ItemKind::GlobalAsm(..) => "global asm item",
ItemKind::TyAlias(..) => "type alias",
ItemKind::OpaqueTy(..) => "opaque type",
ItemKind::Enum(..) => "enum",
ItemKind::Struct(..) => "struct",
ItemKind::Union(..) => "union",
ItemKind::Trait(..) => "trait",
ItemKind::TraitAlias(..) => "trait alias",
ItemKind::Impl(..) => "implementation",
}
}
}
#[derive(Encodable, Debug, HashStable_Generic)]
pub struct TraitItemRef {
pub id: TraitItemId,
pub ident: Ident,
pub kind: AssocItemKind,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub struct ImplItemRef {
pub id: ImplItemId,
pub ident: Ident,
pub kind: AssocItemKind,
pub span: Span,
pub trait_item_def_id: Option<DefId>,
}
#[derive(Copy, Clone, PartialEq, Encodable, Debug, HashStable_Generic)]
pub enum AssocItemKind {
Const,
Fn { has_self: bool },
Type,
}
#[derive(Copy, Clone, PartialEq, Eq, Encodable, Decodable, Debug, HashStable_Generic)]
pub struct ForeignItemId {
pub owner_id: OwnerId,
}
impl ForeignItemId {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
}
#[derive(Debug, HashStable_Generic)]
pub struct ForeignItemRef {
pub id: ForeignItemId,
pub ident: Ident,
pub span: Span,
}
#[derive(Debug, HashStable_Generic)]
pub struct ForeignItem<'hir> {
pub ident: Ident,
pub kind: ForeignItemKind<'hir>,
pub owner_id: OwnerId,
pub span: Span,
pub vis_span: Span,
}
impl ForeignItem<'_> {
#[inline]
pub fn hir_id(&self) -> HirId {
HirId::make_owner(self.owner_id.def_id)
}
pub fn foreign_item_id(&self) -> ForeignItemId {
ForeignItemId { owner_id: self.owner_id }
}
}
#[derive(Debug, HashStable_Generic)]
pub enum ForeignItemKind<'hir> {
Fn(&'hir FnDecl<'hir>, &'hir [Ident], &'hir Generics<'hir>),
Static(&'hir Ty<'hir>, Mutability),
Type,
}
#[derive(Debug, Copy, Clone, Encodable, HashStable_Generic)]
pub struct Upvar {
pub span: Span,
}
#[derive(Encodable, Decodable, Clone, Debug, HashStable_Generic)]
pub struct TraitCandidate {
pub def_id: DefId,
pub import_ids: SmallVec<[LocalDefId; 1]>,
}
#[derive(Copy, Clone, Debug, HashStable_Generic)]
pub enum OwnerNode<'hir> {
Item(&'hir Item<'hir>),
ForeignItem(&'hir ForeignItem<'hir>),
TraitItem(&'hir TraitItem<'hir>),
ImplItem(&'hir ImplItem<'hir>),
Crate(&'hir Mod<'hir>),
}
impl<'hir> OwnerNode<'hir> {
pub fn ident(&self) -> Option<Ident> {
match self {
OwnerNode::Item(Item { ident, .. })
| OwnerNode::ForeignItem(ForeignItem { ident, .. })
| OwnerNode::ImplItem(ImplItem { ident, .. })
| OwnerNode::TraitItem(TraitItem { ident, .. }) => Some(*ident),
OwnerNode::Crate(..) => None,
}
}
pub fn span(&self) -> Span {
match self {
OwnerNode::Item(Item { span, .. })
| OwnerNode::ForeignItem(ForeignItem { span, .. })
| OwnerNode::ImplItem(ImplItem { span, .. })
| OwnerNode::TraitItem(TraitItem { span, .. }) => *span,
OwnerNode::Crate(Mod { spans: ModSpans { inner_span, .. }, .. }) => *inner_span,
}
}
pub fn fn_decl(self) -> Option<&'hir FnDecl<'hir>> {
match self {
OwnerNode::TraitItem(TraitItem { kind: TraitItemKind::Fn(fn_sig, _), .. })
| OwnerNode::ImplItem(ImplItem { kind: ImplItemKind::Fn(fn_sig, _), .. })
| OwnerNode::Item(Item { kind: ItemKind::Fn(fn_sig, _, _), .. }) => Some(fn_sig.decl),
OwnerNode::ForeignItem(ForeignItem {
kind: ForeignItemKind::Fn(fn_decl, _, _),
..
}) => Some(fn_decl),
_ => None,
}
}
pub fn body_id(&self) -> Option<BodyId> {
match self {
OwnerNode::TraitItem(TraitItem {
kind: TraitItemKind::Fn(_, TraitFn::Provided(body_id)),
..
})
| OwnerNode::ImplItem(ImplItem { kind: ImplItemKind::Fn(_, body_id), .. })
| OwnerNode::Item(Item { kind: ItemKind::Fn(.., body_id), .. }) => Some(*body_id),
_ => None,
}
}
pub fn generics(self) -> Option<&'hir Generics<'hir>> {
Node::generics(self.into())
}
pub fn def_id(self) -> OwnerId {
match self {
OwnerNode::Item(Item { owner_id, .. })
| OwnerNode::TraitItem(TraitItem { owner_id, .. })
| OwnerNode::ImplItem(ImplItem { owner_id, .. })
| OwnerNode::ForeignItem(ForeignItem { owner_id, .. }) => *owner_id,
OwnerNode::Crate(..) => crate::CRATE_HIR_ID.owner,
}
}
pub fn expect_item(self) -> &'hir Item<'hir> {
match self {
OwnerNode::Item(n) => n,
_ => panic!(),
}
}
pub fn expect_foreign_item(self) -> &'hir ForeignItem<'hir> {
match self {
OwnerNode::ForeignItem(n) => n,
_ => panic!(),
}
}
pub fn expect_impl_item(self) -> &'hir ImplItem<'hir> {
match self {
OwnerNode::ImplItem(n) => n,
_ => panic!(),
}
}
pub fn expect_trait_item(self) -> &'hir TraitItem<'hir> {
match self {
OwnerNode::TraitItem(n) => n,
_ => panic!(),
}
}
}
impl<'hir> Into<OwnerNode<'hir>> for &'hir Item<'hir> {
fn into(self) -> OwnerNode<'hir> {
OwnerNode::Item(self)
}
}
impl<'hir> Into<OwnerNode<'hir>> for &'hir ForeignItem<'hir> {
fn into(self) -> OwnerNode<'hir> {
OwnerNode::ForeignItem(self)
}
}
impl<'hir> Into<OwnerNode<'hir>> for &'hir ImplItem<'hir> {
fn into(self) -> OwnerNode<'hir> {
OwnerNode::ImplItem(self)
}
}
impl<'hir> Into<OwnerNode<'hir>> for &'hir TraitItem<'hir> {
fn into(self) -> OwnerNode<'hir> {
OwnerNode::TraitItem(self)
}
}
impl<'hir> Into<Node<'hir>> for OwnerNode<'hir> {
fn into(self) -> Node<'hir> {
match self {
OwnerNode::Item(n) => Node::Item(n),
OwnerNode::ForeignItem(n) => Node::ForeignItem(n),
OwnerNode::ImplItem(n) => Node::ImplItem(n),
OwnerNode::TraitItem(n) => Node::TraitItem(n),
OwnerNode::Crate(n) => Node::Crate(n),
}
}
}
#[derive(Copy, Clone, Debug, HashStable_Generic)]
pub enum Node<'hir> {
Param(&'hir Param<'hir>),
Item(&'hir Item<'hir>),
ForeignItem(&'hir ForeignItem<'hir>),
TraitItem(&'hir TraitItem<'hir>),
ImplItem(&'hir ImplItem<'hir>),
Variant(&'hir Variant<'hir>),
Field(&'hir FieldDef<'hir>),
AnonConst(&'hir AnonConst),
Expr(&'hir Expr<'hir>),
ExprField(&'hir ExprField<'hir>),
Stmt(&'hir Stmt<'hir>),
PathSegment(&'hir PathSegment<'hir>),
Ty(&'hir Ty<'hir>),
TypeBinding(&'hir TypeBinding<'hir>),
TraitRef(&'hir TraitRef<'hir>),
Pat(&'hir Pat<'hir>),
PatField(&'hir PatField<'hir>),
Arm(&'hir Arm<'hir>),
Block(&'hir Block<'hir>),
Local(&'hir Local<'hir>),
Ctor(&'hir VariantData<'hir>),
Lifetime(&'hir Lifetime),
GenericParam(&'hir GenericParam<'hir>),
Crate(&'hir Mod<'hir>),
Infer(&'hir InferArg),
}
impl<'hir> Node<'hir> {
pub fn ident(&self) -> Option<Ident> {
match self {
Node::TraitItem(TraitItem { ident, .. })
| Node::ImplItem(ImplItem { ident, .. })
| Node::ForeignItem(ForeignItem { ident, .. })
| Node::Field(FieldDef { ident, .. })
| Node::Variant(Variant { ident, .. })
| Node::Item(Item { ident, .. })
| Node::PathSegment(PathSegment { ident, .. }) => Some(*ident),
Node::Lifetime(lt) => Some(lt.ident),
Node::GenericParam(p) => Some(p.name.ident()),
Node::TypeBinding(b) => Some(b.ident),
Node::Param(..)
| Node::AnonConst(..)
| Node::Expr(..)
| Node::Stmt(..)
| Node::Block(..)
| Node::Ctor(..)
| Node::Pat(..)
| Node::PatField(..)
| Node::ExprField(..)
| Node::Arm(..)
| Node::Local(..)
| Node::Crate(..)
| Node::Ty(..)
| Node::TraitRef(..)
| Node::Infer(..) => None,
}
}
pub fn fn_decl(self) -> Option<&'hir FnDecl<'hir>> {
match self {
Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(fn_sig, _), .. })
| Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(fn_sig, _), .. })
| Node::Item(Item { kind: ItemKind::Fn(fn_sig, _, _), .. }) => Some(fn_sig.decl),
Node::Expr(Expr { kind: ExprKind::Closure(Closure { fn_decl, .. }), .. })
| Node::ForeignItem(ForeignItem { kind: ForeignItemKind::Fn(fn_decl, _, _), .. }) => {
Some(fn_decl)
}
_ => None,
}
}
pub fn fn_sig(self) -> Option<&'hir FnSig<'hir>> {
match self {
Node::TraitItem(TraitItem { kind: TraitItemKind::Fn(fn_sig, _), .. })
| Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(fn_sig, _), .. })
| Node::Item(Item { kind: ItemKind::Fn(fn_sig, _, _), .. }) => Some(fn_sig),
_ => None,
}
}
pub fn body_id(&self) -> Option<BodyId> {
match self {
Node::TraitItem(TraitItem {
kind: TraitItemKind::Fn(_, TraitFn::Provided(body_id)),
..
})
| Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(_, body_id), .. })
| Node::Item(Item { kind: ItemKind::Fn(.., body_id), .. }) => Some(*body_id),
_ => None,
}
}
pub fn generics(self) -> Option<&'hir Generics<'hir>> {
match self {
Node::ForeignItem(ForeignItem {
kind: ForeignItemKind::Fn(_, _, generics), ..
})
| Node::TraitItem(TraitItem { generics, .. })
| Node::ImplItem(ImplItem { generics, .. }) => Some(generics),
Node::Item(item) => item.kind.generics(),
_ => None,
}
}
pub fn as_owner(self) -> Option<OwnerNode<'hir>> {
match self {
Node::Item(i) => Some(OwnerNode::Item(i)),
Node::ForeignItem(i) => Some(OwnerNode::ForeignItem(i)),
Node::TraitItem(i) => Some(OwnerNode::TraitItem(i)),
Node::ImplItem(i) => Some(OwnerNode::ImplItem(i)),
Node::Crate(i) => Some(OwnerNode::Crate(i)),
_ => None,
}
}
pub fn fn_kind(self) -> Option<FnKind<'hir>> {
match self {
Node::Item(i) => match i.kind {
ItemKind::Fn(ref sig, ref generics, _) => {
Some(FnKind::ItemFn(i.ident, generics, sig.header))
}
_ => None,
},
Node::TraitItem(ti) => match ti.kind {
TraitItemKind::Fn(ref sig, TraitFn::Provided(_)) => {
Some(FnKind::Method(ti.ident, sig))
}
_ => None,
},
Node::ImplItem(ii) => match ii.kind {
ImplItemKind::Fn(ref sig, _) => Some(FnKind::Method(ii.ident, sig)),
_ => None,
},
Node::Expr(e) => match e.kind {
ExprKind::Closure { .. } => Some(FnKind::Closure),
_ => None,
},
_ => None,
}
}
pub fn tuple_fields(&self) -> Option<&'hir [FieldDef<'hir>]> {
if let Node::Ctor(&VariantData::Tuple(fields, _, _)) = self { Some(fields) } else { None }
}
}
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
mod size_asserts {
use super::*;
static_assert_size!(Block<'_>, 48);
static_assert_size!(Body<'_>, 32);
static_assert_size!(Expr<'_>, 64);
static_assert_size!(ExprKind<'_>, 48);
static_assert_size!(FnDecl<'_>, 40);
static_assert_size!(ForeignItem<'_>, 72);
static_assert_size!(ForeignItemKind<'_>, 40);
static_assert_size!(GenericArg<'_>, 32);
static_assert_size!(GenericBound<'_>, 48);
static_assert_size!(Generics<'_>, 56);
static_assert_size!(Impl<'_>, 80);
static_assert_size!(ImplItem<'_>, 80);
static_assert_size!(ImplItemKind<'_>, 32);
static_assert_size!(Item<'_>, 80);
static_assert_size!(ItemKind<'_>, 48);
static_assert_size!(Local<'_>, 64);
static_assert_size!(Param<'_>, 32);
static_assert_size!(Pat<'_>, 72);
static_assert_size!(Path<'_>, 40);
static_assert_size!(PathSegment<'_>, 48);
static_assert_size!(PatKind<'_>, 48);
static_assert_size!(QPath<'_>, 24);
static_assert_size!(Res, 12);
static_assert_size!(Stmt<'_>, 32);
static_assert_size!(StmtKind<'_>, 16);
#[cfg(bootstrap)]
static_assert_size!(TraitItem<'_>, 88);
#[cfg(not(bootstrap))]
static_assert_size!(TraitItem<'_>, 80);
#[cfg(bootstrap)]
static_assert_size!(TraitItemKind<'_>, 48);
#[cfg(not(bootstrap))]
static_assert_size!(TraitItemKind<'_>, 40);
static_assert_size!(Ty<'_>, 48);
static_assert_size!(TyKind<'_>, 32);
}