1894 lines
79 KiB
Rust
1894 lines
79 KiB
Rust
//! AST walker. Each overridden visit method has full control over what
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//! happens with its node, it can do its own traversal of the node's children,
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//! call `visit::walk_*` to apply the default traversal algorithm, or prevent
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//! deeper traversal by doing nothing.
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//!
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//! Note: it is an important invariant that the default visitor walks the body
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//! of a function in "execution order" (more concretely, reverse post-order
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//! with respect to the CFG implied by the AST), meaning that if AST node A may
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//! execute before AST node B, then A is visited first. The borrow checker in
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//! particular relies on this property.
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//!
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//! Note: walking an AST before macro expansion is probably a bad idea. For
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//! instance, a walker looking for item names in a module will miss all of
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//! those that are created by the expansion of a macro.
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pub use rustc_ast_ir::visit::VisitorResult;
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pub use rustc_ast_ir::{try_visit, visit_opt, walk_list, walk_visitable_list};
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use rustc_span::source_map::Spanned;
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use rustc_span::{Ident, Span};
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use thin_vec::ThinVec;
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use crate::ast::*;
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use crate::ptr::P;
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use crate::tokenstream::DelimSpan;
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum AssocCtxt {
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Trait,
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Impl { of_trait: bool },
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}
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum FnCtxt {
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Free,
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Foreign,
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Assoc(AssocCtxt),
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}
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#[derive(Copy, Clone, Debug)]
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pub enum BoundKind {
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/// Trait bounds in generics bounds and type/trait alias.
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/// E.g., `<T: Bound>`, `type A: Bound`, or `where T: Bound`.
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Bound,
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/// Trait bounds in `impl` type.
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/// E.g., `type Foo = impl Bound1 + Bound2 + Bound3`.
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Impl,
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/// Trait bounds in trait object type.
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/// E.g., `dyn Bound1 + Bound2 + Bound3`.
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TraitObject,
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/// Super traits of a trait.
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/// E.g., `trait A: B`
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SuperTraits,
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}
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impl BoundKind {
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pub fn descr(self) -> &'static str {
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match self {
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BoundKind::Bound => "bounds",
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BoundKind::Impl => "`impl Trait`",
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BoundKind::TraitObject => "`dyn` trait object bounds",
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BoundKind::SuperTraits => "supertrait bounds",
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}
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}
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}
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#[derive(Copy, Clone, Debug)]
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pub enum LifetimeCtxt {
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/// Appears in a reference type.
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Ref,
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/// Appears as a bound on a type or another lifetime.
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Bound,
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/// Appears as a generic argument.
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GenericArg,
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}
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#[macro_export]
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macro_rules! common_visitor_and_walkers {
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($(($mut: ident))? $Visitor:ident$(<$lt:lifetime>)?) => {
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$(${ignore($lt)}
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#[derive(Copy, Clone)]
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)?
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#[derive(Debug)]
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pub enum FnKind<'a> {
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/// E.g., `fn foo()`, `fn foo(&self)`, or `extern "Abi" fn foo()`.
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Fn(FnCtxt, &'a $($mut)? Visibility, &'a $($mut)? Fn),
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/// E.g., `|x, y| body`.
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Closure(&'a $($mut)? ClosureBinder, &'a $($mut)? Option<CoroutineKind>, &'a $($mut)? P<FnDecl>, &'a $($mut)? P<Expr>),
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}
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impl<'a> FnKind<'a> {
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pub fn header(&'a $($mut)? self) -> Option<&'a $($mut)? FnHeader> {
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match *self {
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FnKind::Fn(_, _, Fn { sig, .. }) => Some(&$($mut)? sig.header),
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FnKind::Closure(..) => None,
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}
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}
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pub fn ident(&'a $($mut)? self) -> Option<&'a $($mut)? Ident> {
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match self {
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FnKind::Fn(_, _, Fn { ident, .. }) => Some(ident),
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_ => None,
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}
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}
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pub fn decl(&'a $($mut)? self) -> &'a $($mut)? FnDecl {
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match self {
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FnKind::Fn(_, _, Fn { sig, .. }) => &$($mut)? sig.decl,
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FnKind::Closure(_, _, decl, _) => decl,
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}
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}
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pub fn ctxt(&self) -> Option<FnCtxt> {
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match self {
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FnKind::Fn(ctxt, ..) => Some(*ctxt),
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FnKind::Closure(..) => None,
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}
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}
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}
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/// Each method of this trait is a hook to be potentially
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/// overridden. Each method's default implementation recursively visits
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/// the substructure of the input via the corresponding `walk` method;
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#[doc = concat!(" e.g., the `visit_item` method by default calls `visit"$(, "_", stringify!($mut))?, "::walk_item`.")]
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///
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/// If you want to ensure that your code handles every variant
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/// explicitly, you need to override each method. (And you also need
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/// to monitor future changes to this trait in case a new method with a
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/// new default implementation gets introduced.)
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///
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/// Every `walk_*` method uses deconstruction to access fields of structs and
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/// enums. This will result in a compile error if a field is added, which makes
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/// it more likely the appropriate visit call will be added for it.
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pub trait $Visitor<$($lt)?> : Sized $(${ignore($mut)} + MutVisitorResult<Result = ()>)? {
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$(
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${ignore($lt)}
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/// The result type of the `visit_*` methods. Can be either `()`,
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/// or `ControlFlow<T>`.
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type Result: VisitorResult = ();
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)?
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// Methods in this trait have one of three forms, with the last two forms
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// only occurring on `MutVisitor`:
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//
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// fn visit_t(&mut self, t: &mut T); // common
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// fn flat_map_t(&mut self, t: T) -> SmallVec<[T; 1]>; // rare
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// fn filter_map_t(&mut self, t: T) -> Option<T>; // rarest
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//
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// When writing these methods, it is better to use destructuring like this:
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//
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// fn visit_abc(&mut self, ABC { a, b, c: _ }: &mut ABC) {
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// visit_a(a);
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// visit_b(b);
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// }
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//
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// than to use field access like this:
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//
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// fn visit_abc(&mut self, abc: &mut ABC) {
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// visit_a(&mut abc.a);
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// visit_b(&mut abc.b);
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// // ignore abc.c
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// }
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//
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// As well as being more concise, the former is explicit about which fields
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// are skipped. Furthermore, if a new field is added, the destructuring
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// version will cause a compile error, which is good. In comparison, the
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// field access version will continue working and it would be easy to
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// forget to add handling for it.
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fn visit_ident(&mut self, Ident { name: _, span }: &$($lt)? $($mut)? Ident) -> Self::Result {
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visit_span(self, span)
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}
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fn visit_foreign_mod(&mut self, nm: &$($lt)? $($mut)? ForeignMod) -> Self::Result {
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walk_foreign_mod(self, nm)
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}
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fn visit_foreign_item(&mut self, i: &$($lt)? $($mut)? ForeignItem) -> Self::Result {
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walk_item(self, i)
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}
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fn visit_item(&mut self, i: &$($lt)? $($mut)? Item) -> Self::Result {
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walk_item(self, i)
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}
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fn visit_local(&mut self, l: &$($lt)? $($mut)? Local) -> Self::Result {
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walk_local(self, l)
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}
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fn visit_block(&mut self, b: &$($lt)? $($mut)? Block) -> Self::Result {
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walk_block(self, b)
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}
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fn visit_param(&mut self, param: &$($lt)? $($mut)? Param) -> Self::Result {
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walk_param(self, param)
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}
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fn visit_arm(&mut self, a: &$($lt)? $($mut)? Arm) -> Self::Result {
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walk_arm(self, a)
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}
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fn visit_pat(&mut self, p: &$($lt)? $($mut)? Pat) -> Self::Result {
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walk_pat(self, p)
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}
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fn visit_anon_const(&mut self, c: &$($lt)? $($mut)? AnonConst) -> Self::Result {
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walk_anon_const(self, c)
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}
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fn visit_expr(&mut self, ex: &$($lt)? $($mut)? Expr) -> Self::Result {
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walk_expr(self, ex)
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}
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/// This method is a hack to workaround unstable of `stmt_expr_attributes`.
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/// It can be removed once that feature is stabilized.
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fn visit_method_receiver_expr(&mut self, ex: &$($lt)? $($mut)? Expr) -> Self::Result {
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self.visit_expr(ex)
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}
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fn visit_ty(&mut self, t: &$($lt)? $($mut)? Ty) -> Self::Result {
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walk_ty(self, t)
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}
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fn visit_ty_pat(&mut self, t: &$($lt)? $($mut)? TyPat) -> Self::Result {
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walk_ty_pat(self, t)
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}
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fn visit_generic_param(&mut self, param: &$($lt)? $($mut)? GenericParam) -> Self::Result {
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walk_generic_param(self, param)
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}
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fn visit_generics(&mut self, g: &$($lt)? $($mut)? Generics) -> Self::Result {
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walk_generics(self, g)
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}
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fn visit_closure_binder(&mut self, b: &$($lt)? $($mut)? ClosureBinder) -> Self::Result {
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walk_closure_binder(self, b)
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}
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fn visit_contract(&mut self, c: &$($lt)? $($mut)? FnContract) -> Self::Result {
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walk_contract(self, c)
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}
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fn visit_where_predicate(&mut self, p: &$($lt)? $($mut)? WherePredicate) -> Self::Result {
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walk_where_predicate(self, p)
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}
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fn visit_where_predicate_kind(&mut self, k: &$($lt)? $($mut)? WherePredicateKind) -> Self::Result {
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walk_where_predicate_kind(self, k)
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}
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// for `MutVisitor`: `Span` and `NodeId` are mutated at the caller site.
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fn visit_fn(
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&mut self,
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fk: FnKind<$($lt)? $(${ignore($mut)} '_)?>,
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_: Span,
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_: NodeId
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) -> Self::Result {
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walk_fn(self, fk)
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}
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fn visit_assoc_item(&mut self, i: &$($lt)? $($mut)? AssocItem, ctxt: AssocCtxt) -> Self::Result {
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walk_assoc_item(self, i, ctxt)
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}
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fn visit_trait_ref(&mut self, t: &$($lt)? $($mut)? TraitRef) -> Self::Result {
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walk_trait_ref(self, t)
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}
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fn visit_param_bound(&mut self, bounds: &$($lt)? $($mut)? GenericBound, _ctxt: BoundKind) -> Self::Result {
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walk_param_bound(self, bounds)
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}
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fn visit_precise_capturing_arg(&mut self, arg: &$($lt)? $($mut)? PreciseCapturingArg) -> Self::Result {
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walk_precise_capturing_arg(self, arg)
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}
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fn visit_poly_trait_ref(&mut self, t: &$($lt)? $($mut)? PolyTraitRef) -> Self::Result {
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walk_poly_trait_ref(self, t)
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}
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fn visit_variant_data(&mut self, s: &$($lt)? $($mut)? VariantData) -> Self::Result {
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walk_variant_data(self, s)
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}
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fn visit_field_def(&mut self, s: &$($lt)? $($mut)? FieldDef) -> Self::Result {
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walk_field_def(self, s)
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}
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fn visit_variant(&mut self, v: &$($lt)? $($mut)? Variant) -> Self::Result {
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walk_variant(self, v)
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}
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fn visit_label(&mut self, label: &$($lt)? $($mut)? Label) -> Self::Result {
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walk_label(self, label)
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}
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fn visit_lifetime(&mut self, lifetime: &$($lt)? $($mut)? Lifetime, $(${ignore($lt)} _: LifetimeCtxt )?) -> Self::Result {
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walk_lifetime(self, lifetime)
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}
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fn visit_mac_call(&mut self, mac: &$($lt)? $($mut)? MacCall) -> Self::Result {
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walk_mac(self, mac)
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}
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fn visit_id(&mut self, _id: $(&$mut)? NodeId) -> Self::Result {
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Self::Result::output()
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}
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fn visit_macro_def(&mut self, macro_def: &$($lt)? $($mut)? MacroDef) -> Self::Result {
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walk_macro_def(self, macro_def)
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}
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fn visit_path(&mut self, path: &$($lt)? $($mut)? Path) -> Self::Result {
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walk_path(self, path)
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}
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fn visit_use_tree(&mut self, use_tree: &$($lt)? $($mut)? UseTree) -> Self::Result {
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walk_use_tree(self, use_tree)
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}
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fn visit_path_segment(&mut self, path_segment: &$($lt)? $($mut)? PathSegment) -> Self::Result {
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walk_path_segment(self, path_segment)
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}
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fn visit_generic_args(&mut self, generic_args: &$($lt)? $($mut)? GenericArgs) -> Self::Result {
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walk_generic_args(self, generic_args)
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}
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fn visit_generic_arg(&mut self, generic_arg: &$($lt)? $($mut)? GenericArg) -> Self::Result {
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walk_generic_arg(self, generic_arg)
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}
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fn visit_assoc_item_constraint(
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&mut self,
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constraint: &$($lt)? $($mut)? AssocItemConstraint,
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) -> Self::Result {
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walk_assoc_item_constraint(self, constraint)
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}
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fn visit_attribute(&mut self, attr: &$($lt)? $($mut)? Attribute) -> Self::Result {
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walk_attribute(self, attr)
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}
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fn visit_vis(&mut self, vis: &$($lt)? $($mut)? Visibility) -> Self::Result {
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walk_vis(self, vis)
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}
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fn visit_fn_ret_ty(&mut self, ret_ty: &$($lt)? $($mut)? FnRetTy) -> Self::Result {
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walk_fn_ret_ty(self, ret_ty)
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}
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fn visit_fn_header(&mut self, header: &$($lt)? $($mut)? FnHeader) -> Self::Result {
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walk_fn_header(self, header)
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}
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fn visit_expr_field(&mut self, f: &$($lt)? $($mut)? ExprField) -> Self::Result {
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walk_expr_field(self, f)
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}
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fn visit_pat_field(&mut self, fp: &$($lt)? $($mut)? PatField) -> Self::Result {
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walk_pat_field(self, fp)
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}
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fn visit_crate(&mut self, krate: &$($lt)? $($mut)? Crate) -> Self::Result {
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walk_crate(self, krate)
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}
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fn visit_inline_asm(&mut self, asm: &$($lt)? $($mut)? InlineAsm) -> Self::Result {
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walk_inline_asm(self, asm)
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}
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fn visit_format_args(&mut self, fmt: &$($lt)? $($mut)? FormatArgs) -> Self::Result {
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walk_format_args(self, fmt)
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}
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fn visit_inline_asm_sym(&mut self, sym: &$($lt)? $($mut)? InlineAsmSym) -> Self::Result {
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walk_inline_asm_sym(self, sym)
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}
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fn visit_capture_by(&mut self, capture_by: &$($lt)? $($mut)? CaptureBy) -> Self::Result {
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walk_capture_by(self, capture_by)
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}
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fn visit_coroutine_kind(&mut self, coroutine_kind: &$($lt)? $($mut)? CoroutineKind) -> Self::Result {
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walk_coroutine_kind(self, coroutine_kind)
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}
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fn visit_fn_decl(&mut self, fn_decl: &$($lt)? $($mut)? FnDecl) -> Self::Result {
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walk_fn_decl(self, fn_decl)
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}
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fn visit_qself(&mut self, qs: &$($lt)? $($mut)? Option<P<QSelf>>) -> Self::Result {
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walk_qself(self, qs)
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}
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// (non-mut) `Visitor`-only methods
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$(
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fn visit_stmt(&mut self, s: &$lt Stmt) -> Self::Result {
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walk_stmt(self, s)
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}
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|
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fn visit_nested_use_tree(&mut self, use_tree: &$lt UseTree, id: NodeId) -> Self::Result {
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try_visit!(self.visit_id(id));
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self.visit_use_tree(use_tree)
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}
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)?
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|
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|
// `MutVisitor`-only methods
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|
$(
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fn flat_map_foreign_item(&mut self, ni: P<ForeignItem>) -> SmallVec<[P<ForeignItem>; 1]> {
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walk_flat_map_foreign_item(self, ni)
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|
}
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|
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|
fn flat_map_item(&mut self, i: P<Item>) -> SmallVec<[P<Item>; 1]> {
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walk_flat_map_item(self, i)
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|
}
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|
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|
fn flat_map_field_def(&mut self, fd: FieldDef) -> SmallVec<[FieldDef; 1]> {
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|
walk_flat_map_field_def(self, fd)
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|
}
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|
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|
fn flat_map_assoc_item(
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|
&mut self,
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|
i: P<AssocItem>,
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|
ctxt: AssocCtxt,
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|
) -> SmallVec<[P<AssocItem>; 1]> {
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walk_flat_map_assoc_item(self, i, ctxt)
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|
}
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|
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|
fn flat_map_stmt(&mut self, s: Stmt) -> SmallVec<[Stmt; 1]> {
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|
walk_flat_map_stmt(self, s)
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|
}
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|
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|
fn flat_map_arm(&mut self, arm: Arm) -> SmallVec<[Arm; 1]> {
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|
walk_flat_map_arm(self, arm)
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|
}
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|
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|
fn filter_map_expr(&mut self, e: P<Expr>) -> Option<P<Expr>> {
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|
walk_filter_map_expr(self, e)
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|
}
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|
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|
fn flat_map_variant(&mut self, v: Variant) -> SmallVec<[Variant; 1]> {
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|
walk_flat_map_variant(self, v)
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|
}
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|
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|
fn flat_map_param(&mut self, param: Param) -> SmallVec<[Param; 1]> {
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|
walk_flat_map_param(self, param)
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|
}
|
|
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|
fn flat_map_generic_param(&mut self, param: GenericParam) -> SmallVec<[GenericParam; 1]> {
|
|
walk_flat_map_generic_param(self, param)
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|
}
|
|
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|
fn flat_map_expr_field(&mut self, f: ExprField) -> SmallVec<[ExprField; 1]> {
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|
walk_flat_map_expr_field(self, f)
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|
}
|
|
|
|
fn flat_map_where_predicate(
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|
&mut self,
|
|
where_predicate: WherePredicate,
|
|
) -> SmallVec<[WherePredicate; 1]> {
|
|
walk_flat_map_where_predicate(self, where_predicate)
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|
}
|
|
|
|
// Span visiting is no longer used, but we keep it for now,
|
|
// in case it's needed for something like #127241.
|
|
fn visit_span(&mut self, _sp: &$mut Span) {
|
|
// Do nothing.
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|
}
|
|
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|
fn flat_map_pat_field(&mut self, fp: PatField) -> SmallVec<[PatField; 1]> {
|
|
walk_flat_map_pat_field(self, fp)
|
|
}
|
|
)?
|
|
}
|
|
|
|
pub trait WalkItemKind {
|
|
type Ctxt;
|
|
fn walk<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
&$($lt)? $($mut)? self,
|
|
span: Span,
|
|
id: NodeId,
|
|
visibility: &$($lt)? $($mut)? Visibility,
|
|
ctxt: Self::Ctxt,
|
|
vis: &mut V,
|
|
) -> V::Result;
|
|
}
|
|
|
|
// this is only used by the MutVisitor. We include this symmetry here to make writing other functions easier
|
|
$(${ignore($lt)}
|
|
#[expect(unused, rustc::pass_by_value)]
|
|
#[inline]
|
|
)?
|
|
fn visit_span<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, span: &$($lt)? $($mut)? Span) -> V::Result {
|
|
$(
|
|
${ignore($mut)}
|
|
vis.visit_span(span);
|
|
)?
|
|
V::Result::output()
|
|
}
|
|
|
|
/// helper since `Visitor` wants `NodeId` but `MutVisitor` wants `&mut NodeId`
|
|
$(${ignore($lt)}
|
|
#[expect(rustc::pass_by_value)]
|
|
)?
|
|
#[inline]
|
|
fn visit_id<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, id: &$($lt)? $($mut)? NodeId) -> V::Result {
|
|
// deref `&NodeId` into `NodeId` only for `Visitor`
|
|
vis.visit_id( $(${ignore($lt)} * )? id)
|
|
}
|
|
|
|
// this is only used by the MutVisitor. We include this symmetry here to make writing other functions easier
|
|
fn visit_safety<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, safety: &$($lt)? $($mut)? Safety) -> V::Result {
|
|
match safety {
|
|
Safety::Unsafe(span) => visit_span(vis, span),
|
|
Safety::Safe(span) => visit_span(vis, span),
|
|
Safety::Default => { V::Result::output() }
|
|
}
|
|
}
|
|
|
|
fn visit_constness<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, constness: &$($lt)? $($mut)? Const) -> V::Result {
|
|
match constness {
|
|
Const::Yes(span) => visit_span(vis, span),
|
|
Const::No => {
|
|
V::Result::output()
|
|
}
|
|
}
|
|
}
|
|
|
|
fn visit_defaultness<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, defaultness: &$($lt)? $($mut)? Defaultness) -> V::Result {
|
|
match defaultness {
|
|
Defaultness::Default(span) => visit_span(vis, span),
|
|
Defaultness::Final => {
|
|
V::Result::output()
|
|
}
|
|
}
|
|
}
|
|
|
|
fn visit_polarity<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
polarity: &$($lt)? $($mut)? ImplPolarity,
|
|
) -> V::Result {
|
|
match polarity {
|
|
ImplPolarity::Positive => { V::Result::output() }
|
|
ImplPolarity::Negative(span) => visit_span(vis, span),
|
|
}
|
|
}
|
|
|
|
$(${ignore($lt)}
|
|
#[inline]
|
|
)?
|
|
fn visit_modifiers<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
m: &$($lt)? $($mut)? TraitBoundModifiers
|
|
) -> V::Result {
|
|
let TraitBoundModifiers { constness, asyncness, polarity } = m;
|
|
match constness {
|
|
BoundConstness::Never => {}
|
|
BoundConstness::Always(span) | BoundConstness::Maybe(span) => try_visit!(visit_span(vis, span)),
|
|
}
|
|
match asyncness {
|
|
BoundAsyncness::Normal => {}
|
|
BoundAsyncness::Async(span) => try_visit!(visit_span(vis, span)),
|
|
}
|
|
match polarity {
|
|
BoundPolarity::Positive => {}
|
|
BoundPolarity::Negative(span) | BoundPolarity::Maybe(span) => try_visit!(visit_span(vis, span)),
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
$(${ignore($lt)}
|
|
#[inline]
|
|
)?
|
|
fn walk_capture_by<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
capture_by: &$($lt)? $($mut)? CaptureBy
|
|
) -> V::Result {
|
|
match capture_by {
|
|
CaptureBy::Ref => { V::Result::output() }
|
|
CaptureBy::Value { move_kw } => {
|
|
visit_span(vis, move_kw)
|
|
}
|
|
CaptureBy::Use { use_kw } => {
|
|
visit_span(vis, use_kw)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn visit_bounds<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, bounds: &$($lt)? $($mut)? GenericBounds, ctxt: BoundKind) -> V::Result {
|
|
walk_list!(visitor, visit_param_bound, bounds, ctxt);
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_label<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, Label { ident }: &$($lt)? $($mut)? Label) -> V::Result {
|
|
visitor.visit_ident(ident)
|
|
}
|
|
|
|
pub fn walk_fn_header<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, header: &$($lt)? $($mut)? FnHeader) -> V::Result {
|
|
let FnHeader { safety, coroutine_kind, constness, ext: _ } = header;
|
|
try_visit!(visit_constness(visitor, constness));
|
|
visit_opt!(visitor, visit_coroutine_kind, coroutine_kind);
|
|
visit_safety(visitor, safety)
|
|
}
|
|
|
|
pub fn walk_lifetime<$($lt,)? V: $Visitor$(<$lt>)?>(visitor: &mut V, Lifetime { id, ident }: &$($lt)? $($mut)? Lifetime) -> V::Result {
|
|
try_visit!(visit_id(visitor, id));
|
|
visitor.visit_ident(ident)
|
|
}
|
|
|
|
fn walk_item_ctxt<$($lt,)? V: $Visitor$(<$lt>)?, K: WalkItemKind>(
|
|
visitor: &mut V,
|
|
item: &$($mut)? $($lt)? Item<K>,
|
|
ctxt: K::Ctxt,
|
|
) -> V::Result {
|
|
let Item { attrs, id, kind, vis, span, tokens: _ } = item;
|
|
try_visit!(visit_id(visitor, id));
|
|
walk_list!(visitor, visit_attribute, attrs);
|
|
try_visit!(visitor.visit_vis(vis));
|
|
try_visit!(kind.walk(*span, *id, vis, ctxt, visitor));
|
|
visit_span(visitor, span)
|
|
}
|
|
|
|
pub fn walk_item<$($lt,)? V: $Visitor$(<$lt>)?, K: WalkItemKind<Ctxt = ()>>(
|
|
visitor: &mut V,
|
|
item: &$($mut)? $($lt)? Item<K>,
|
|
) -> V::Result {
|
|
walk_item_ctxt(visitor, item, ())
|
|
}
|
|
|
|
pub fn walk_assoc_item<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
visitor: &mut V,
|
|
item: &$($mut)? $($lt)? AssocItem,
|
|
ctxt: AssocCtxt,
|
|
) -> V::Result {
|
|
walk_item_ctxt(visitor, item, ctxt)
|
|
}
|
|
|
|
impl WalkItemKind for ItemKind {
|
|
type Ctxt = ();
|
|
fn walk<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
&$($lt)? $($mut)? self,
|
|
span: Span,
|
|
id: NodeId,
|
|
visibility: &$($lt)? $($mut)? Visibility,
|
|
_ctxt: Self::Ctxt,
|
|
vis: &mut V,
|
|
) -> V::Result {
|
|
match self {
|
|
ItemKind::ExternCrate(_orig_name, ident) => vis.visit_ident(ident),
|
|
ItemKind::Use(use_tree) => vis.visit_use_tree(use_tree),
|
|
ItemKind::Static(box StaticItem {
|
|
ident,
|
|
ty,
|
|
safety: _,
|
|
mutability: _,
|
|
expr,
|
|
define_opaque,
|
|
}) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_opt!(vis, visit_expr, expr);
|
|
walk_define_opaques(vis, define_opaque)
|
|
}
|
|
ItemKind::Const(item) => {
|
|
walk_const_item(vis, item)
|
|
}
|
|
ItemKind::Fn(func) => {
|
|
let kind = FnKind::Fn(FnCtxt::Free, visibility, &$($mut)? *func);
|
|
vis.visit_fn(kind, span, id)
|
|
}
|
|
ItemKind::Mod(safety, ident, mod_kind) => {
|
|
try_visit!(visit_safety(vis, safety));
|
|
try_visit!(vis.visit_ident(ident));
|
|
match mod_kind {
|
|
ModKind::Loaded(
|
|
items,
|
|
_inline,
|
|
ModSpans { inner_span, inject_use_span },
|
|
_,
|
|
) => {
|
|
try_visit!(visit_items(vis, items));
|
|
try_visit!(visit_span(vis, inner_span));
|
|
try_visit!(visit_span(vis, inject_use_span));
|
|
}
|
|
ModKind::Unloaded => {}
|
|
}
|
|
V::Result::output()
|
|
}
|
|
ItemKind::ForeignMod(nm) => vis.visit_foreign_mod(nm),
|
|
ItemKind::GlobalAsm(asm) => vis.visit_inline_asm(asm),
|
|
ItemKind::TyAlias(box TyAlias {
|
|
defaultness,
|
|
ident,
|
|
generics,
|
|
$(${ignore($lt)} #[expect(unused)])?
|
|
where_clauses,
|
|
bounds,
|
|
ty,
|
|
}) => {
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(visit_bounds(vis, bounds, BoundKind::Bound));
|
|
visit_opt!(vis, visit_ty, ty);
|
|
$(${ignore($mut)}
|
|
walk_ty_alias_where_clauses(vis, where_clauses);
|
|
)?
|
|
V::Result::output()
|
|
}
|
|
ItemKind::Enum(ident, generics, enum_definition) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
visit_variants(vis, &$($mut)? enum_definition.variants)
|
|
}
|
|
ItemKind::Struct(ident, generics, variant_data)
|
|
| ItemKind::Union(ident, generics, variant_data) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
vis.visit_variant_data(variant_data)
|
|
}
|
|
ItemKind::Impl(box Impl {
|
|
defaultness,
|
|
safety,
|
|
generics,
|
|
constness,
|
|
polarity,
|
|
of_trait,
|
|
self_ty,
|
|
items,
|
|
}) => {
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(visit_safety(vis, safety));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(visit_constness(vis, constness));
|
|
try_visit!(visit_polarity(vis, polarity));
|
|
visit_opt!(vis, visit_trait_ref, of_trait);
|
|
try_visit!(vis.visit_ty(self_ty));
|
|
visit_assoc_items(vis, items, AssocCtxt::Impl { of_trait: of_trait.is_some() })
|
|
}
|
|
ItemKind::Trait(box Trait { safety, is_auto: _, ident, generics, bounds, items }) => {
|
|
try_visit!(visit_safety(vis, safety));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(visit_bounds(vis, bounds, BoundKind::Bound));
|
|
visit_assoc_items(vis, items, AssocCtxt::Trait)
|
|
}
|
|
ItemKind::TraitAlias(ident, generics, bounds) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
visit_bounds(vis, bounds, BoundKind::Bound)
|
|
}
|
|
ItemKind::MacCall(m) => vis.visit_mac_call(m),
|
|
ItemKind::MacroDef(ident, def) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
vis.visit_macro_def(def)
|
|
}
|
|
ItemKind::Delegation(box Delegation {
|
|
id,
|
|
qself,
|
|
path,
|
|
ident,
|
|
rename,
|
|
body,
|
|
from_glob: _,
|
|
}) => {
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_qself(qself));
|
|
try_visit!(vis.visit_path(path));
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_ident, rename);
|
|
visit_opt!(vis, visit_block, body);
|
|
V::Result::output()
|
|
}
|
|
ItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
|
|
try_visit!(vis.visit_qself(qself));
|
|
try_visit!(vis.visit_path(prefix));
|
|
if let Some(suffixes) = suffixes {
|
|
for (ident, rename) in suffixes {
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_ident, rename);
|
|
}
|
|
}
|
|
visit_opt!(vis, visit_block, body);
|
|
V::Result::output()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn walk_const_item<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
item: &$($lt)? $($mut)? ConstItem,
|
|
) -> V::Result {
|
|
let ConstItem { defaultness, ident, generics, ty, expr, define_opaque } = item;
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_opt!(vis, visit_expr, expr);
|
|
walk_define_opaques(vis, define_opaque)
|
|
}
|
|
|
|
fn walk_foreign_mod<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, foreign_mod: &$($lt)? $($mut)? ForeignMod) -> V::Result {
|
|
let ForeignMod { extern_span: _, safety, abi: _, items } = foreign_mod;
|
|
try_visit!(visit_safety(vis, safety));
|
|
visit_foreign_items(vis, items)
|
|
}
|
|
|
|
fn walk_define_opaques<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
visitor: &mut V,
|
|
define_opaque: &$($lt)? $($mut)? Option<ThinVec<(NodeId, Path)>>,
|
|
) -> V::Result {
|
|
if let Some(define_opaque) = define_opaque {
|
|
for (id, path) in define_opaque {
|
|
try_visit!(visit_id(visitor, id));
|
|
try_visit!(visitor.visit_path(path));
|
|
}
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
impl WalkItemKind for AssocItemKind {
|
|
type Ctxt = AssocCtxt;
|
|
fn walk<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
&$($lt)? $($mut)? self,
|
|
span: Span,
|
|
id: NodeId,
|
|
visibility: &$($lt)? $($mut)? Visibility,
|
|
ctxt: Self::Ctxt,
|
|
vis: &mut V,
|
|
) -> V::Result {
|
|
match self {
|
|
AssocItemKind::Const(item) => {
|
|
walk_const_item(vis, item)
|
|
}
|
|
AssocItemKind::Fn(func) => {
|
|
vis.visit_fn(FnKind::Fn(FnCtxt::Assoc(ctxt), visibility, &$($mut)? *func), span, id)
|
|
}
|
|
AssocItemKind::Type(box TyAlias {
|
|
generics,
|
|
ident,
|
|
bounds,
|
|
ty,
|
|
defaultness,
|
|
$(${ignore($lt)} #[expect(unused)])?
|
|
where_clauses,
|
|
}) => {
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(visit_bounds(vis, bounds, BoundKind::Bound));
|
|
visit_opt!(vis, visit_ty, ty);
|
|
$(${ignore($mut)}
|
|
walk_ty_alias_where_clauses(vis, where_clauses);
|
|
)?
|
|
V::Result::output()
|
|
}
|
|
AssocItemKind::MacCall(mac) => {
|
|
vis.visit_mac_call(mac)
|
|
}
|
|
AssocItemKind::Delegation(box Delegation {
|
|
id,
|
|
qself,
|
|
path,
|
|
ident,
|
|
rename,
|
|
body,
|
|
from_glob: _,
|
|
}) => {
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_qself(qself));
|
|
try_visit!(vis.visit_path(path));
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_ident, rename);
|
|
visit_opt!(vis, visit_block, body);
|
|
V::Result::output()
|
|
}
|
|
AssocItemKind::DelegationMac(box DelegationMac { qself, prefix, suffixes, body }) => {
|
|
try_visit!(vis.visit_qself(qself));
|
|
try_visit!(vis.visit_path(prefix));
|
|
if let Some(suffixes) = suffixes {
|
|
for (ident, rename) in suffixes {
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_ident, rename);
|
|
}
|
|
}
|
|
visit_opt!(vis, visit_block, body);
|
|
V::Result::output()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl WalkItemKind for ForeignItemKind {
|
|
type Ctxt = ();
|
|
fn walk<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
&$($lt)? $($mut)? self,
|
|
span: Span,
|
|
id: NodeId,
|
|
visibility: &$($lt)? $($mut)? Visibility,
|
|
_ctxt: Self::Ctxt,
|
|
vis: &mut V,
|
|
) -> V::Result {
|
|
match self {
|
|
ForeignItemKind::Static(box StaticItem {
|
|
ident,
|
|
ty,
|
|
mutability: _,
|
|
expr,
|
|
safety: _,
|
|
define_opaque,
|
|
}) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_opt!(vis, visit_expr, expr);
|
|
walk_define_opaques(vis, define_opaque)
|
|
}
|
|
ForeignItemKind::Fn(func) => {
|
|
vis.visit_fn(FnKind::Fn(FnCtxt::Foreign, visibility, &$($mut)?*func), span, id)
|
|
}
|
|
ForeignItemKind::TyAlias(box TyAlias {
|
|
defaultness,
|
|
ident,
|
|
generics,
|
|
bounds,
|
|
ty,
|
|
$(${ignore($lt)} #[expect(unused)])?
|
|
where_clauses,
|
|
}) => {
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(visit_bounds(vis, bounds, BoundKind::Bound));
|
|
visit_opt!(vis, visit_ty, ty);
|
|
$(${ignore($mut)}
|
|
walk_ty_alias_where_clauses(vis, where_clauses);
|
|
)?
|
|
V::Result::output()
|
|
}
|
|
ForeignItemKind::MacCall(mac) => {
|
|
vis.visit_mac_call(mac)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn walk_coroutine_kind<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
coroutine_kind: &$($lt)? $($mut)? CoroutineKind,
|
|
) -> V::Result {
|
|
let (CoroutineKind::Async { span, closure_id, return_impl_trait_id }
|
|
| CoroutineKind::Gen { span, closure_id, return_impl_trait_id }
|
|
| CoroutineKind::AsyncGen { span, closure_id, return_impl_trait_id })
|
|
= coroutine_kind;
|
|
try_visit!(visit_id(vis, closure_id));
|
|
try_visit!(visit_id(vis, return_impl_trait_id));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_pat<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
pattern: &$($lt)? $($mut)? Pat
|
|
) -> V::Result {
|
|
let Pat { id, kind, span, tokens: _ } = pattern;
|
|
try_visit!(visit_id(vis, id));
|
|
match kind {
|
|
PatKind::Err(_guar) => {}
|
|
PatKind::Missing | PatKind::Wild | PatKind::Rest | PatKind::Never => {}
|
|
PatKind::Ident(_bmode, ident, optional_subpattern) => {
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_pat, optional_subpattern);
|
|
}
|
|
PatKind::Expr(expression) => try_visit!(vis.visit_expr(expression)),
|
|
PatKind::TupleStruct(opt_qself, path, elems) => {
|
|
try_visit!(vis.visit_qself(opt_qself));
|
|
try_visit!(vis.visit_path(path));
|
|
walk_list!(vis, visit_pat, elems);
|
|
}
|
|
PatKind::Path(opt_qself, path) => {
|
|
try_visit!(vis.visit_qself(opt_qself));
|
|
try_visit!(vis.visit_path(path))
|
|
}
|
|
PatKind::Struct(opt_qself, path, fields, _rest) => {
|
|
try_visit!(vis.visit_qself(opt_qself));
|
|
try_visit!(vis.visit_path(path));
|
|
try_visit!(visit_pat_fields(vis, fields));
|
|
}
|
|
PatKind::Box(subpattern) | PatKind::Deref(subpattern) | PatKind::Paren(subpattern) => {
|
|
try_visit!(vis.visit_pat(subpattern));
|
|
}
|
|
PatKind::Ref(subpattern, _ /*mutbl*/) => {
|
|
try_visit!(vis.visit_pat(subpattern));
|
|
}
|
|
PatKind::Range(lower_bound, upper_bound, _end) => {
|
|
visit_opt!(vis, visit_expr, lower_bound);
|
|
visit_opt!(vis, visit_expr, upper_bound);
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
PatKind::Guard(subpattern, guard_condition) => {
|
|
try_visit!(vis.visit_pat(subpattern));
|
|
try_visit!(vis.visit_expr(guard_condition));
|
|
}
|
|
PatKind::Tuple(elems) | PatKind::Slice(elems) | PatKind::Or(elems) => {
|
|
walk_list!(vis, visit_pat, elems);
|
|
}
|
|
PatKind::MacCall(mac) => try_visit!(vis.visit_mac_call(mac)),
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_anon_const<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
constant: &$($lt)? $($mut)? AnonConst,
|
|
) -> V::Result {
|
|
let AnonConst { id, value } = constant;
|
|
try_visit!(visit_id(vis, id));
|
|
vis.visit_expr(value)
|
|
}
|
|
|
|
pub fn walk_path_segment<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
segment: &$($lt)? $($mut)? PathSegment,
|
|
) -> V::Result {
|
|
let PathSegment { ident, id, args } = segment;
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_generic_args, args);
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_block<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
block: &$($lt)? $($mut)? Block
|
|
) -> V::Result {
|
|
let Block { stmts, id, rules: _, span, tokens: _ } = block;
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(visit_stmts(vis, stmts));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
|
|
pub fn walk_ty<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V, ty: &$($lt)? $($mut)? Ty
|
|
) -> V::Result {
|
|
let Ty { id, kind, span, tokens: _ } = ty;
|
|
try_visit!(visit_id(vis, id));
|
|
match kind {
|
|
TyKind::Err(_guar) => {}
|
|
TyKind::Infer | TyKind::ImplicitSelf | TyKind::Dummy | TyKind::Never | TyKind::CVarArgs => {}
|
|
TyKind::Slice(ty) | TyKind::Paren(ty) => try_visit!(vis.visit_ty(ty)),
|
|
TyKind::Ptr(MutTy { ty, mutbl: _ }) => try_visit!(vis.visit_ty(ty)),
|
|
TyKind::Ref(opt_lifetime, MutTy { ty, mutbl: _ })
|
|
| TyKind::PinnedRef(opt_lifetime, MutTy { ty, mutbl: _ }) => {
|
|
// FIXME(fee1-dead) asymmetry
|
|
visit_opt!(vis, visit_lifetime, opt_lifetime$(${ignore($lt)}, LifetimeCtxt::Ref)?);
|
|
try_visit!(vis.visit_ty(ty));
|
|
}
|
|
TyKind::Tup(tuple_element_types) => {
|
|
walk_list!(vis, visit_ty, tuple_element_types);
|
|
}
|
|
TyKind::BareFn(function_declaration) => {
|
|
let BareFnTy { safety, ext: _, generic_params, decl, decl_span } =
|
|
&$($mut)? **function_declaration;
|
|
try_visit!(visit_safety(vis, safety));
|
|
try_visit!(visit_generic_params(vis, generic_params));
|
|
try_visit!(vis.visit_fn_decl(decl));
|
|
try_visit!(visit_span(vis, decl_span));
|
|
}
|
|
TyKind::UnsafeBinder(binder) => {
|
|
try_visit!(visit_generic_params(vis, &$($mut)? binder.generic_params));
|
|
try_visit!(vis.visit_ty(&$($mut)? binder.inner_ty));
|
|
}
|
|
TyKind::Path(maybe_qself, path) => {
|
|
try_visit!(vis.visit_qself(maybe_qself));
|
|
try_visit!(vis.visit_path(path));
|
|
}
|
|
TyKind::Pat(ty, pat) => {
|
|
try_visit!(vis.visit_ty(ty));
|
|
try_visit!(vis.visit_ty_pat(pat));
|
|
}
|
|
TyKind::Array(ty, length) => {
|
|
try_visit!(vis.visit_ty(ty));
|
|
try_visit!(vis.visit_anon_const(length));
|
|
}
|
|
TyKind::TraitObject(bounds, _syntax) => {
|
|
walk_list!(vis, visit_param_bound, bounds, BoundKind::TraitObject);
|
|
}
|
|
TyKind::ImplTrait(id, bounds) => {
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_param_bound, bounds, BoundKind::Impl);
|
|
}
|
|
TyKind::Typeof(expression) => try_visit!(vis.visit_anon_const(expression)),
|
|
|
|
TyKind::MacCall(mac) => try_visit!(vis.visit_mac_call(mac)),
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_crate<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
krate: &$($lt)? $($mut)? Crate,
|
|
) -> V::Result {
|
|
let Crate { attrs, items, spans, id, is_placeholder: _ } = krate;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(visit_items(vis, items));
|
|
let ModSpans { inner_span, inject_use_span } = spans;
|
|
try_visit!(visit_span(vis, inner_span));
|
|
visit_span(vis, inject_use_span)
|
|
}
|
|
|
|
pub fn walk_local<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
local: &$($lt)? $($mut)? Local,
|
|
) -> V::Result {
|
|
let Local { id, super_, pat, ty, kind, span, colon_sp, attrs, tokens: _ } = local;
|
|
if let Some(sp) = super_ {
|
|
try_visit!(visit_span(vis, sp));
|
|
}
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_pat(pat));
|
|
visit_opt!(vis, visit_ty, ty);
|
|
match kind {
|
|
LocalKind::Decl => {}
|
|
LocalKind::Init(init) => {
|
|
try_visit!(vis.visit_expr(init))
|
|
}
|
|
LocalKind::InitElse(init, els) => {
|
|
try_visit!(vis.visit_expr(init));
|
|
try_visit!(vis.visit_block(els));
|
|
}
|
|
}
|
|
if let Some(sp) = colon_sp {
|
|
try_visit!(visit_span(vis, sp));
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_poly_trait_ref<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
p: &$($lt)? $($mut)? PolyTraitRef,
|
|
) -> V::Result {
|
|
let PolyTraitRef { bound_generic_params, modifiers, trait_ref, span } = p;
|
|
try_visit!(visit_modifiers(vis, modifiers));
|
|
try_visit!(visit_generic_params(vis, bound_generic_params));
|
|
try_visit!(vis.visit_trait_ref(trait_ref));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_trait_ref<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
TraitRef { path, ref_id }: &$($lt)? $($mut)? TraitRef,
|
|
) -> V::Result {
|
|
try_visit!(vis.visit_path(path));
|
|
visit_id(vis, ref_id)
|
|
}
|
|
|
|
pub fn walk_variant<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
variant: &$($lt)? $($mut)? Variant,
|
|
) -> V::Result {
|
|
let Variant { attrs, id, span, vis: visibility, ident, data, disr_expr, is_placeholder: _ } = variant;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_vis(visibility));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_variant_data(data));
|
|
visit_opt!(vis, visit_anon_const, disr_expr);
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_expr_field<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
f: &$($lt)? $($mut)? ExprField,
|
|
) -> V::Result {
|
|
let ExprField { attrs, id, span, ident, expr, is_shorthand: _, is_placeholder: _ } = f;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_expr(expr));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_pat_field<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
fp: &$($lt)? $($mut)? PatField,
|
|
) -> V::Result {
|
|
let PatField { ident, pat, is_shorthand: _, attrs, id, span, is_placeholder: _ } = fp;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_pat(pat));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_ty_pat<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
tp: &$($lt)? $($mut)? TyPat,
|
|
) -> V::Result {
|
|
let TyPat { id, kind, span, tokens: _ } = tp;
|
|
try_visit!(visit_id(vis, id));
|
|
match kind {
|
|
TyPatKind::Range(start, end, _include_end) => {
|
|
visit_opt!(vis, visit_anon_const, start);
|
|
visit_opt!(vis, visit_anon_const, end);
|
|
}
|
|
TyPatKind::Or(variants) => walk_list!(vis, visit_ty_pat, variants),
|
|
TyPatKind::Err(_) => {}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
fn walk_qself<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
qself: &$($lt)? $($mut)? Option<P<QSelf>>,
|
|
) -> V::Result {
|
|
if let Some(qself) = qself {
|
|
let QSelf { ty, path_span, position: _ } = &$($mut)? **qself;
|
|
try_visit!(vis.visit_ty(ty));
|
|
try_visit!(visit_span(vis, path_span));
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_path<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
path: &$($lt)? $($mut)? Path,
|
|
) -> V::Result {
|
|
let Path { span, segments, tokens: _ } = path;
|
|
walk_list!(vis, visit_path_segment, segments);
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_use_tree<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
use_tree: &$($lt)? $($mut)? UseTree,
|
|
) -> V::Result {
|
|
let UseTree { prefix, kind, span } = use_tree;
|
|
try_visit!(vis.visit_path(prefix));
|
|
match kind {
|
|
UseTreeKind::Simple(rename) => {
|
|
// The extra IDs are handled during AST lowering.
|
|
visit_opt!(vis, visit_ident, rename);
|
|
}
|
|
UseTreeKind::Glob => {}
|
|
UseTreeKind::Nested { items, span } => {
|
|
for (nested_tree, nested_id) in items {
|
|
try_visit!(visit_nested_use_tree(vis, nested_tree, nested_id));
|
|
}
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_generic_args<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
generic_args: &$($lt)? $($mut)? GenericArgs
|
|
) -> V::Result {
|
|
match generic_args {
|
|
GenericArgs::AngleBracketed(AngleBracketedArgs { span, args }) => {
|
|
for arg in args {
|
|
match arg {
|
|
AngleBracketedArg::Arg(a) => try_visit!(vis.visit_generic_arg(a)),
|
|
AngleBracketedArg::Constraint(c) => {
|
|
try_visit!(vis.visit_assoc_item_constraint(c))
|
|
}
|
|
}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
GenericArgs::Parenthesized(data) => {
|
|
let ParenthesizedArgs { span, inputs, inputs_span, output } = data;
|
|
walk_list!(vis, visit_ty, inputs);
|
|
try_visit!(vis.visit_fn_ret_ty(output));
|
|
try_visit!(visit_span(vis, span));
|
|
visit_span(vis, inputs_span)
|
|
}
|
|
GenericArgs::ParenthesizedElided(span) => visit_span(vis, span)
|
|
}
|
|
}
|
|
|
|
pub fn walk_generic_arg<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
generic_arg: &$($lt)? $($mut)? GenericArg,
|
|
) -> V::Result {
|
|
match generic_arg {
|
|
GenericArg::Lifetime(lt) => vis.visit_lifetime(lt, $(${ignore($lt)} LifetimeCtxt::GenericArg)? ),
|
|
GenericArg::Type(ty) => vis.visit_ty(ty),
|
|
GenericArg::Const(ct) => vis.visit_anon_const(ct),
|
|
}
|
|
}
|
|
|
|
pub fn walk_assoc_item_constraint<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
constraint: &$($lt)? $($mut)? AssocItemConstraint,
|
|
) -> V::Result {
|
|
let AssocItemConstraint { id, ident, gen_args, kind, span } = constraint;
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_ident(ident));
|
|
visit_opt!(vis, visit_generic_args, gen_args);
|
|
match kind {
|
|
AssocItemConstraintKind::Equality { term } => match term {
|
|
Term::Ty(ty) => try_visit!(vis.visit_ty(ty)),
|
|
Term::Const(c) => try_visit!(vis.visit_anon_const(c)),
|
|
},
|
|
AssocItemConstraintKind::Bound { bounds } => {
|
|
try_visit!(visit_bounds(vis, bounds, BoundKind::Bound));
|
|
}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_param_bound<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, bound: &$($lt)? $($mut)? GenericBound) -> V::Result {
|
|
match bound {
|
|
GenericBound::Trait(trait_ref) => vis.visit_poly_trait_ref(trait_ref),
|
|
GenericBound::Outlives(lifetime) => vis.visit_lifetime(lifetime, $(${ignore($lt)} LifetimeCtxt::Bound)?),
|
|
GenericBound::Use(args, span) => {
|
|
walk_list!(vis, visit_precise_capturing_arg, args);
|
|
visit_span(vis, span)
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn walk_precise_capturing_arg<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
arg: &$($lt)? $($mut)? PreciseCapturingArg,
|
|
) -> V::Result {
|
|
match arg {
|
|
PreciseCapturingArg::Lifetime(lt) => vis.visit_lifetime(lt, $(${ignore($lt)} LifetimeCtxt::GenericArg)?),
|
|
PreciseCapturingArg::Arg(path, id) => {
|
|
try_visit!(visit_id(vis, id));
|
|
vis.visit_path(path)
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn walk_generic_param<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
param: &$($lt)? $($mut)? GenericParam,
|
|
) -> V::Result {
|
|
let GenericParam { id, ident, attrs, bounds, is_placeholder: _, kind, colon_span } =
|
|
param;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_ident(ident));
|
|
walk_list!(vis, visit_param_bound, bounds, BoundKind::Bound);
|
|
match kind {
|
|
GenericParamKind::Lifetime => (),
|
|
GenericParamKind::Type { default } => visit_opt!(vis, visit_ty, default),
|
|
GenericParamKind::Const { ty, default, kw_span: _ } => {
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_opt!(vis, visit_anon_const, default);
|
|
}
|
|
}
|
|
if let Some(sp) = colon_span {
|
|
try_visit!(visit_span(vis, sp))
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_generics<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, generics: &$($lt)? $($mut)? Generics) -> V::Result {
|
|
let Generics { params, where_clause, span } = generics;
|
|
let WhereClause { has_where_token: _, predicates, span: where_clause_span } = where_clause;
|
|
try_visit!(visit_generic_params(vis, params));
|
|
try_visit!(visit_where_predicates(vis, predicates));
|
|
try_visit!(visit_span(vis, span));
|
|
visit_span(vis, where_clause_span)
|
|
}
|
|
|
|
pub fn walk_contract<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, c: &$($lt)? $($mut)? FnContract) -> V::Result {
|
|
let FnContract { requires, ensures } = c;
|
|
visit_opt!(vis, visit_expr, requires);
|
|
visit_opt!(vis, visit_expr, ensures);
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_where_predicate<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
predicate: &$($lt)? $($mut)? WherePredicate,
|
|
) -> V::Result {
|
|
let WherePredicate { attrs, kind, id, span, is_placeholder: _ } = predicate;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(visit_span(vis, span));
|
|
vis.visit_where_predicate_kind(kind)
|
|
}
|
|
|
|
pub fn walk_closure_binder<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
binder: &$($lt)? $($mut)? ClosureBinder,
|
|
) -> V::Result {
|
|
match binder {
|
|
ClosureBinder::NotPresent => {}
|
|
ClosureBinder::For { generic_params, span } => {
|
|
try_visit!(visit_generic_params(vis, generic_params));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_where_predicate_kind<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
kind: &$($lt)? $($mut)? WherePredicateKind,
|
|
) -> V::Result {
|
|
match kind {
|
|
WherePredicateKind::BoundPredicate(WhereBoundPredicate {
|
|
bounded_ty,
|
|
bounds,
|
|
bound_generic_params,
|
|
}) => {
|
|
try_visit!(visit_generic_params(vis, bound_generic_params));
|
|
try_visit!(vis.visit_ty(bounded_ty));
|
|
walk_list!(vis, visit_param_bound, bounds, BoundKind::Bound);
|
|
}
|
|
WherePredicateKind::RegionPredicate(WhereRegionPredicate { lifetime, bounds }) => {
|
|
try_visit!(vis.visit_lifetime(lifetime, $(${ignore($lt)} LifetimeCtxt::Bound )?));
|
|
walk_list!(vis, visit_param_bound, bounds, BoundKind::Bound);
|
|
}
|
|
WherePredicateKind::EqPredicate(WhereEqPredicate { lhs_ty, rhs_ty }) => {
|
|
try_visit!(vis.visit_ty(lhs_ty));
|
|
try_visit!(vis.visit_ty(rhs_ty));
|
|
}
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_fn_decl<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
FnDecl { inputs, output }: &$($lt)? $($mut)? FnDecl,
|
|
) -> V::Result {
|
|
try_visit!(visit_params(vis, inputs));
|
|
vis.visit_fn_ret_ty(output)
|
|
}
|
|
|
|
pub fn walk_fn_ret_ty<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, ret_ty: &$($lt)? $($mut)? FnRetTy) -> V::Result {
|
|
match ret_ty {
|
|
FnRetTy::Default(span) => visit_span(vis, span),
|
|
FnRetTy::Ty(output_ty) => vis.visit_ty(output_ty),
|
|
}
|
|
}
|
|
|
|
pub fn walk_fn<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, kind: FnKind<$($lt)? $(${ignore($mut)} '_)?>) -> V::Result {
|
|
match kind {
|
|
FnKind::Fn(
|
|
_ctxt,
|
|
_vis,
|
|
Fn {
|
|
defaultness,
|
|
ident,
|
|
sig: FnSig { header, decl, span },
|
|
generics,
|
|
contract,
|
|
body,
|
|
define_opaque,
|
|
},
|
|
) => {
|
|
// Visibility is visited as a part of the item.
|
|
try_visit!(visit_defaultness(vis, defaultness));
|
|
try_visit!(vis.visit_ident(ident));
|
|
try_visit!(vis.visit_fn_header(header));
|
|
try_visit!(vis.visit_generics(generics));
|
|
try_visit!(vis.visit_fn_decl(decl));
|
|
visit_opt!(vis, visit_contract, contract);
|
|
visit_opt!(vis, visit_block, body);
|
|
try_visit!(visit_span(vis, span));
|
|
walk_define_opaques(vis, define_opaque)
|
|
}
|
|
FnKind::Closure(binder, coroutine_kind, decl, body) => {
|
|
try_visit!(vis.visit_closure_binder(binder));
|
|
visit_opt!(vis, visit_coroutine_kind, coroutine_kind);
|
|
try_visit!(vis.visit_fn_decl(decl));
|
|
vis.visit_expr(body)
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn walk_variant_data<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, data: &$($lt)? $($mut)? VariantData) -> V::Result {
|
|
match data {
|
|
VariantData::Struct { fields, recovered: _ } => {
|
|
visit_field_defs(vis, fields)
|
|
}
|
|
VariantData::Tuple(fields, id) => {
|
|
try_visit!(visit_id(vis, id));
|
|
visit_field_defs(vis, fields)
|
|
}
|
|
VariantData::Unit(id) => visit_id(vis, id),
|
|
}
|
|
}
|
|
|
|
pub fn walk_field_def<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, field: &$($lt)? $($mut)? FieldDef) -> V::Result {
|
|
let FieldDef { attrs, id, span, vis: visibility, ident, ty, is_placeholder: _, safety: _, default } =
|
|
field;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_vis(visibility));
|
|
visit_opt!(vis, visit_ident, ident);
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_opt!(vis, visit_anon_const, default);
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
fn visit_delim_args<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, args: &$($lt)? $($mut)? DelimArgs) -> V::Result {
|
|
let DelimArgs { dspan, delim: _, tokens: _ } = args;
|
|
let DelimSpan { open, close } = dspan;
|
|
try_visit!(visit_span(vis, open));
|
|
visit_span(vis, close)
|
|
}
|
|
|
|
pub fn walk_mac<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, mac: &$($lt)? $($mut)? MacCall) -> V::Result {
|
|
let MacCall { path, args } = mac;
|
|
try_visit!(vis.visit_path(path));
|
|
visit_delim_args(vis, args)
|
|
}
|
|
|
|
fn walk_macro_def<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, macro_def: &$($lt)? $($mut)? MacroDef) -> V::Result {
|
|
let MacroDef { body, macro_rules: _ } = macro_def;
|
|
visit_delim_args(vis, body)
|
|
}
|
|
|
|
pub fn walk_inline_asm<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, asm: &$($lt)? $($mut)? InlineAsm) -> V::Result {
|
|
// FIXME: Visit spans inside all this currently ignored stuff.
|
|
let InlineAsm {
|
|
asm_macro: _,
|
|
template: _,
|
|
template_strs: _,
|
|
operands,
|
|
clobber_abis: _,
|
|
options: _,
|
|
line_spans: _,
|
|
} = asm;
|
|
for (op, span) in operands {
|
|
match op {
|
|
InlineAsmOperand::In { expr, reg: _ }
|
|
| InlineAsmOperand::Out { expr: Some(expr), reg: _, late: _ }
|
|
| InlineAsmOperand::InOut { expr, reg: _, late: _ } => {
|
|
try_visit!(vis.visit_expr(expr))
|
|
}
|
|
InlineAsmOperand::Out { expr: None, reg: _, late: _ } => {}
|
|
InlineAsmOperand::SplitInOut { in_expr, out_expr, reg: _, late: _ } => {
|
|
try_visit!(vis.visit_expr(in_expr));
|
|
visit_opt!(vis, visit_expr, out_expr);
|
|
}
|
|
InlineAsmOperand::Const { anon_const } => {
|
|
try_visit!(vis.visit_anon_const(anon_const))
|
|
}
|
|
InlineAsmOperand::Sym { sym } => try_visit!(vis.visit_inline_asm_sym(sym)),
|
|
InlineAsmOperand::Label { block } => try_visit!(vis.visit_block(block)),
|
|
}
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
V::Result::output()
|
|
}
|
|
|
|
pub fn walk_inline_asm_sym<$($lt,)? V: $Visitor$(<$lt>)?>(
|
|
vis: &mut V,
|
|
InlineAsmSym { id, qself, path }: &$($lt)? $($mut)? InlineAsmSym,
|
|
) -> V::Result {
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_qself(qself));
|
|
vis.visit_path(path)
|
|
}
|
|
|
|
// FIXME: visit the template exhaustively.
|
|
pub fn walk_format_args<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, fmt: &$($lt)? $($mut)? FormatArgs) -> V::Result {
|
|
let FormatArgs { span, template: _, arguments, uncooked_fmt_str: _, is_source_literal: _ } = fmt;
|
|
let args = $(${ignore($mut)} arguments.all_args_mut())? $(${ignore($lt)} arguments.all_args())? ;
|
|
for FormatArgument { kind, expr } in args {
|
|
match kind {
|
|
FormatArgumentKind::Named(ident) | FormatArgumentKind::Captured(ident) => {
|
|
try_visit!(vis.visit_ident(ident))
|
|
}
|
|
FormatArgumentKind::Normal => {}
|
|
}
|
|
try_visit!(vis.visit_expr(expr));
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_expr<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, expression: &$($lt)? $($mut)? Expr) -> V::Result {
|
|
let Expr { id, kind, span, attrs, tokens: _ } = expression;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
match kind {
|
|
ExprKind::Array(exprs) => {
|
|
try_visit!(visit_exprs(vis, exprs));
|
|
}
|
|
ExprKind::ConstBlock(anon_const) => try_visit!(vis.visit_anon_const(anon_const)),
|
|
ExprKind::Repeat(element, count) => {
|
|
try_visit!(vis.visit_expr(element));
|
|
try_visit!(vis.visit_anon_const(count));
|
|
}
|
|
ExprKind::Struct(se) => {
|
|
let StructExpr { qself, path, fields, rest } = &$($mut)?**se;
|
|
try_visit!(vis.visit_qself(qself));
|
|
try_visit!(vis.visit_path(path));
|
|
try_visit!(visit_expr_fields(vis, fields));
|
|
match rest {
|
|
StructRest::Base(expr) => try_visit!(vis.visit_expr(expr)),
|
|
StructRest::Rest(_span) => {}
|
|
StructRest::None => {}
|
|
}
|
|
}
|
|
ExprKind::Tup(exprs) => {
|
|
try_visit!(visit_exprs(vis, exprs));
|
|
}
|
|
ExprKind::Call(callee_expression, arguments) => {
|
|
try_visit!(vis.visit_expr(callee_expression));
|
|
try_visit!(visit_exprs(vis, arguments));
|
|
}
|
|
ExprKind::MethodCall(box MethodCall { seg, receiver, args, span }) => {
|
|
try_visit!(vis.visit_method_receiver_expr(receiver));
|
|
try_visit!(vis.visit_path_segment(seg));
|
|
try_visit!(visit_exprs(vis, args));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
ExprKind::Binary(Spanned { span, node: _ }, left_expression, right_expression) => {
|
|
try_visit!(vis.visit_expr(left_expression));
|
|
try_visit!(vis.visit_expr(right_expression));
|
|
try_visit!(visit_span(vis, span))
|
|
}
|
|
ExprKind::AddrOf(_kind, _mutbl, subexpression) => {
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
}
|
|
ExprKind::Unary(_op, subexpression) => {
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
}
|
|
ExprKind::Cast(subexpression, typ) | ExprKind::Type(subexpression, typ) => {
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
try_visit!(vis.visit_ty(typ));
|
|
}
|
|
ExprKind::Let(pat, expr, span, _recovered) => {
|
|
try_visit!(vis.visit_pat(pat));
|
|
try_visit!(vis.visit_expr(expr));
|
|
try_visit!(visit_span(vis, span))
|
|
}
|
|
ExprKind::If(head_expression, if_block, optional_else) => {
|
|
try_visit!(vis.visit_expr(head_expression));
|
|
try_visit!(vis.visit_block(if_block));
|
|
visit_opt!(vis, visit_expr, optional_else);
|
|
}
|
|
ExprKind::While(subexpression, block, opt_label) => {
|
|
visit_opt!(vis, visit_label, opt_label);
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
try_visit!(vis.visit_block(block));
|
|
}
|
|
ExprKind::ForLoop { pat, iter, body, label, kind: _ } => {
|
|
visit_opt!(vis, visit_label, label);
|
|
try_visit!(vis.visit_pat(pat));
|
|
try_visit!(vis.visit_expr(iter));
|
|
try_visit!(vis.visit_block(body));
|
|
}
|
|
ExprKind::Loop(block, opt_label, span) => {
|
|
visit_opt!(vis, visit_label, opt_label);
|
|
try_visit!(vis.visit_block(block));
|
|
try_visit!(visit_span(vis, span))
|
|
}
|
|
ExprKind::Match(subexpression, arms, _kind) => {
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
try_visit!(visit_arms(vis, arms));
|
|
}
|
|
ExprKind::Closure(box Closure {
|
|
binder,
|
|
capture_clause,
|
|
coroutine_kind,
|
|
constness,
|
|
movability: _,
|
|
fn_decl,
|
|
body,
|
|
fn_decl_span,
|
|
fn_arg_span,
|
|
}) => {
|
|
try_visit!(visit_constness(vis, constness));
|
|
try_visit!(vis.visit_capture_by(capture_clause));
|
|
try_visit!(vis.visit_fn(
|
|
FnKind::Closure(binder, coroutine_kind, fn_decl, body),
|
|
*span,
|
|
*id
|
|
));
|
|
try_visit!(visit_span(vis, fn_decl_span));
|
|
try_visit!(visit_span(vis, fn_arg_span));
|
|
}
|
|
ExprKind::Block(block, opt_label) => {
|
|
visit_opt!(vis, visit_label, opt_label);
|
|
try_visit!(vis.visit_block(block));
|
|
}
|
|
ExprKind::Gen(_capt, body, _kind, decl_span) => {
|
|
try_visit!(vis.visit_block(body));
|
|
try_visit!(visit_span(vis, decl_span));
|
|
}
|
|
ExprKind::Await(expr, span) => {
|
|
try_visit!(vis.visit_expr(expr));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
ExprKind::Use(expr, span) => {
|
|
try_visit!(vis.visit_expr(expr));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
ExprKind::Assign(lhs, rhs, span) => {
|
|
try_visit!(vis.visit_expr(lhs));
|
|
try_visit!(vis.visit_expr(rhs));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
ExprKind::AssignOp(_op, left_expression, right_expression) => {
|
|
try_visit!(vis.visit_expr(left_expression));
|
|
try_visit!(vis.visit_expr(right_expression));
|
|
}
|
|
ExprKind::Field(subexpression, ident) => {
|
|
try_visit!(vis.visit_expr(subexpression));
|
|
try_visit!(vis.visit_ident(ident));
|
|
}
|
|
ExprKind::Index(main_expression, index_expression, span) => {
|
|
try_visit!(vis.visit_expr(main_expression));
|
|
try_visit!(vis.visit_expr(index_expression));
|
|
try_visit!(visit_span(vis, span));
|
|
}
|
|
ExprKind::Range(start, end, _limit) => {
|
|
visit_opt!(vis, visit_expr, start);
|
|
visit_opt!(vis, visit_expr, end);
|
|
}
|
|
ExprKind::Underscore => {}
|
|
ExprKind::Path(maybe_qself, path) => {
|
|
try_visit!(vis.visit_qself(maybe_qself));
|
|
try_visit!(vis.visit_path(path));
|
|
}
|
|
ExprKind::Break(opt_label, opt_expr) => {
|
|
visit_opt!(vis, visit_label, opt_label);
|
|
visit_opt!(vis, visit_expr, opt_expr);
|
|
}
|
|
ExprKind::Continue(opt_label) => {
|
|
visit_opt!(vis, visit_label, opt_label);
|
|
}
|
|
ExprKind::Ret(optional_expression) => {
|
|
visit_opt!(vis, visit_expr, optional_expression);
|
|
}
|
|
ExprKind::Yeet(optional_expression) => {
|
|
visit_opt!(vis, visit_expr, optional_expression);
|
|
}
|
|
ExprKind::Become(expr) => try_visit!(vis.visit_expr(expr)),
|
|
ExprKind::MacCall(mac) => try_visit!(vis.visit_mac_call(mac)),
|
|
ExprKind::Paren(subexpression) => try_visit!(vis.visit_expr(subexpression)),
|
|
ExprKind::InlineAsm(asm) => try_visit!(vis.visit_inline_asm(asm)),
|
|
ExprKind::FormatArgs(f) => try_visit!(vis.visit_format_args(f)),
|
|
ExprKind::OffsetOf(container, fields) => {
|
|
try_visit!(vis.visit_ty(container));
|
|
walk_list!(vis, visit_ident, fields);
|
|
}
|
|
ExprKind::Yield(kind) => {
|
|
match kind {
|
|
YieldKind::Postfix(expr) => {
|
|
try_visit!(vis.visit_expr(expr));
|
|
}
|
|
YieldKind::Prefix(expr) => {
|
|
visit_opt!(vis, visit_expr, expr);
|
|
}
|
|
}
|
|
}
|
|
ExprKind::Try(subexpression) => try_visit!(vis.visit_expr(subexpression)),
|
|
ExprKind::TryBlock(body) => try_visit!(vis.visit_block(body)),
|
|
ExprKind::Lit(_token) => {}
|
|
ExprKind::IncludedBytes(_bytes) => {}
|
|
ExprKind::UnsafeBinderCast(_kind, expr, ty) => {
|
|
try_visit!(vis.visit_expr(expr));
|
|
visit_opt!(vis, visit_ty, ty);
|
|
}
|
|
ExprKind::Err(_guar) => {}
|
|
ExprKind::Dummy => {}
|
|
}
|
|
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_param<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, param: &$($lt)? $($mut)? Param) -> V::Result {
|
|
let Param { attrs, ty, pat, id, span, is_placeholder: _ } = param;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_pat(pat));
|
|
try_visit!(vis.visit_ty(ty));
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_arm<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, arm: &$($lt)? $($mut)? Arm) -> V::Result {
|
|
let Arm { attrs, pat, guard, body, span, id, is_placeholder: _ } = arm;
|
|
try_visit!(visit_id(vis, id));
|
|
walk_list!(vis, visit_attribute, attrs);
|
|
try_visit!(vis.visit_pat(pat));
|
|
visit_opt!(vis, visit_expr, guard);
|
|
visit_opt!(vis, visit_expr, body);
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_vis<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, visibility: &$($lt)? $($mut)? Visibility) -> V::Result {
|
|
let Visibility { kind, span, tokens: _ } = visibility;
|
|
match kind {
|
|
VisibilityKind::Restricted { path, id, shorthand: _ } => {
|
|
try_visit!(visit_id(vis, id));
|
|
try_visit!(vis.visit_path(path));
|
|
}
|
|
VisibilityKind::Public | VisibilityKind::Inherited => {}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_attribute<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, attr: &$($lt)? $($mut)? Attribute) -> V::Result {
|
|
let Attribute { kind, id: _, style: _, span } = attr;
|
|
match kind {
|
|
AttrKind::Normal(normal) => {
|
|
let NormalAttr { item, tokens: _ } = &$($mut)?**normal;
|
|
let AttrItem { unsafety: _, path, args, tokens: _ } = item;
|
|
try_visit!(vis.visit_path(path));
|
|
try_visit!(walk_attr_args(vis, args));
|
|
}
|
|
AttrKind::DocComment(_kind, _sym) => {}
|
|
}
|
|
visit_span(vis, span)
|
|
}
|
|
|
|
pub fn walk_attr_args<$($lt,)? V: $Visitor$(<$lt>)?>(vis: &mut V, args: &$($lt)? $($mut)? AttrArgs) -> V::Result {
|
|
match args {
|
|
AttrArgs::Empty => {}
|
|
AttrArgs::Delimited(args) => try_visit!(visit_delim_args(vis, args)),
|
|
AttrArgs::Eq { eq_span, expr } => {
|
|
try_visit!(vis.visit_expr(expr));
|
|
try_visit!(visit_span(vis, eq_span));
|
|
}
|
|
}
|
|
V::Result::output()
|
|
}
|
|
};
|
|
}
|
|
|
|
common_visitor_and_walkers!(Visitor<'a>);
|
|
|
|
macro_rules! generate_list_visit_fns {
|
|
($($name:ident, $Ty:ty, $visit_fn:ident$(, $param:ident: $ParamTy:ty)*;)+) => {
|
|
$(
|
|
fn $name<'a, V: Visitor<'a>>(
|
|
vis: &mut V,
|
|
values: &'a ThinVec<$Ty>,
|
|
$(
|
|
$param: $ParamTy,
|
|
)*
|
|
) -> V::Result {
|
|
walk_list!(vis, $visit_fn, values$(,$param)*);
|
|
V::Result::output()
|
|
}
|
|
)+
|
|
}
|
|
}
|
|
|
|
generate_list_visit_fns! {
|
|
visit_items, P<Item>, visit_item;
|
|
visit_foreign_items, P<ForeignItem>, visit_foreign_item;
|
|
visit_generic_params, GenericParam, visit_generic_param;
|
|
visit_stmts, Stmt, visit_stmt;
|
|
visit_exprs, P<Expr>, visit_expr;
|
|
visit_expr_fields, ExprField, visit_expr_field;
|
|
visit_pat_fields, PatField, visit_pat_field;
|
|
visit_variants, Variant, visit_variant;
|
|
visit_assoc_items, P<AssocItem>, visit_assoc_item, ctxt: AssocCtxt;
|
|
visit_where_predicates, WherePredicate, visit_where_predicate;
|
|
visit_params, Param, visit_param;
|
|
visit_field_defs, FieldDef, visit_field_def;
|
|
visit_arms, Arm, visit_arm;
|
|
}
|
|
|
|
#[expect(rustc::pass_by_value)] // needed for symmetry with mut_visit
|
|
fn visit_nested_use_tree<'a, V: Visitor<'a>>(
|
|
vis: &mut V,
|
|
nested_tree: &'a UseTree,
|
|
&nested_id: &NodeId,
|
|
) -> V::Result {
|
|
vis.visit_nested_use_tree(nested_tree, nested_id)
|
|
}
|
|
|
|
pub fn walk_stmt<'a, V: Visitor<'a>>(visitor: &mut V, statement: &'a Stmt) -> V::Result {
|
|
let Stmt { id, kind, span: _ } = statement;
|
|
try_visit!(visit_id(visitor, id));
|
|
match kind {
|
|
StmtKind::Let(local) => try_visit!(visitor.visit_local(local)),
|
|
StmtKind::Item(item) => try_visit!(visitor.visit_item(item)),
|
|
StmtKind::Expr(expr) | StmtKind::Semi(expr) => try_visit!(visitor.visit_expr(expr)),
|
|
StmtKind::Empty => {}
|
|
StmtKind::MacCall(mac) => {
|
|
let MacCallStmt { mac, attrs, style: _, tokens: _ } = &**mac;
|
|
walk_list!(visitor, visit_attribute, attrs);
|
|
try_visit!(visitor.visit_mac_call(mac));
|
|
}
|
|
}
|
|
V::Result::output()
|
|
}
|