Crate rustc_hir[][src]

Expand description

HIR datatypes. See the rustc dev guide for more info.

Re-exports

pub use hir_id::*;
pub use lang_items::LangItem;
pub use lang_items::LanguageItems;

Modules

For each definition, we track the following data. A definition here is defined somewhat circularly as “something with a DefId”, but it generally corresponds to things like structs, enums, etc. There are also some rather random cases (like const initializer expressions) that are mostly just leftovers.

HIR walker for walking the contents of nodes.

Defines language items.

This module implements some validity checks for attributes. In particular it verifies that #[inline] and #[repr] attributes are attached to items that actually support them and if there are conflicts between multiple such attributes attached to the same item.

Validity checking for weak lang items

Macros

This declares a list of types which can be allocated by Arena.

Structs

A constant (expression) that’s not an item or associated item, but needs its own DefId for type-checking, const-eval, etc. These are usually found nested inside types (e.g., array lengths) or expressions (e.g., repeat counts), and also used to define explicit discriminant values for enum variants.

Represents a single arm of a match expression, e.g. <pat> (if <guard>) => <body>.

A block of statements { .. }, which may have a label (in this case the targeted_by_break field will be true) and may be unsafe by means of the rules being anything but DefaultBlock.

The body of a function, closure, or constant value. In the case of a function, the body contains not only the function body itself (which is an expression), but also the argument patterns, since those are something that the caller doesn’t really care about.

The top-level data structure that stores the entire contents of the crate currently being compiled.

An expression.

Represents the header (not the body) of a function declaration.

Represents a function’s signature in a trait declaration, trait implementation, or a free function.

A reference from a foreign block to one of its items. This contains the item’s ID, naturally, but also the item’s name and some other high-level details (like whether it is an associated type or method, and whether it is public). This allows other passes to find the impl they want without loading the ID (which means fewer edges in the incremental compilation graph).

Represents lifetimes and type parameters attached to a declaration of a function, enum, trait, etc.

Represents anything within an impl block.

A reference from an impl to one of its associated items. This contains the item’s ID, naturally, but also the item’s name and some other high-level details (like whether it is an associated type or method, and whether it is public). This allows other passes to find the impl they want without loading the ID (which means fewer edges in the incremental compilation graph).

An item

Represents a let statement (i.e., let <pat>:<ty> = <expr>;).

Represents a parameter in a function header.

A single field in a struct pattern.

A Path is essentially Rust’s notion of a name; for instance, std::cmp::PartialEq. It’s represented as a sequence of identifiers, along with a bunch of supporting information.

A segment of a path: an identifier, an optional lifetime, and a set of types.

A statement.

Represents an item declaration within a trait declaration, possibly including a default implementation. A trait item is either required (meaning it doesn’t have an implementation, just a signature) or provided (meaning it has a default implementation).

A reference from an trait to one of its associated items. This contains the item’s id, naturally, but also the item’s name and some other high-level details (like whether it is an associated type or method, and whether it is public). This allows other passes to find the impl they want without loading the ID (which means fewer edges in the incremental compilation graph).

References to traits in impls.

Bind a type to an associated type (i.e., A = Foo).

A variable captured by a closure.

A type bound (e.g., for<'c> Foo: Send + Clone + 'c).

A where-clause in a definition.

An equality predicate (e.g., T = int); currently unsupported.

A lifetime predicate (e.g., 'a: 'b + 'c).

Enums

In the case of a generator created as part of an async construct, which kind of async construct caused it to be created?

Explicit binding annotations given in the HIR for a binding. Note that this is not the final binding mode that we infer after type inference.

The kind of borrow in an AddrOf expression, e.g., &place or &raw const place.

A capture clause used in closures and async blocks.

The kind of an item that requires const-checking.

An item within an extern block.

The type of source expression that caused this generator to be created.

The AST represents all type param bounds as types. typeck::collect::compute_bounds matches these against the “special” built-in traits (see middle::lang_items) and detects Copy, Send and Sync.

Represents various kinds of content within an impl.

Represents what type of implicit self a function has, if any.

Is the trait definition an auto trait?

Hints at the original code for a let statement.

The loop type that yielded an ExprKind::Loop.

Hints at the original code for a match _ { .. }.

The movability of a generator / closure literal: whether a generator contains self-references, causing it to be !Unpin.

From whence the opaque type came.

Not represented directly in the AST; referred to by name through a ty_path.

Represents an optionally Self-qualified value/type path or associated extension.

The contents of a statement.

Synthetic type parameters are converted to another form during lowering; this allows us to track the original form they had, and is useful for error messages.

A modifier on a bound, currently this is only used for ?Sized, where the modifier is Maybe. Negative bounds should also be handled here.

Represents a trait method’s body (or just argument names).

Represents a trait method or associated constant or type

The various kinds of types recognized by the compiler.

Fields and constructor IDs of enum variants and structs.

A single predicate in a where-clause.

The yield kind that caused an ExprKind::Yield.

Constants

Traits

Requirements for a StableHashingContext to be used in this crate. This is a hack to allow using the HashStable_Generic derive macro instead of implementing everything in rustc_middle.

Functions

Checks if the specified expression is a built-in range literal. (See: LoweringContext::lower_expr()).

Type Definitions

A literal.