Crate rustc_hir

Expand description

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

Re-exports§

arena 🔒: Declares an arena that can allocate values of any Copy type, and of any !Copy type listed below.
def
def_id
def_path_hash_map
definitions: 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 🔒
intravisit: HIR walker for walking the contents of nodes.
lints
pat_util
stable_hash_impls 🔒
target_impls 🔒: Implements conversions from HIR types to Target.

Arena
HirId: Uniquely identifies a node in the HIR of the current crate. It is composed of the owner, which is the LocalDefId of the directly enclosing hir::Item, hir::TraitItem, or hir::ImplItem (i.e., the closest “item-like”), and the local_id which is unique within the given owner.
ItemLocalId: An ItemLocalId uniquely identifies something within a given “item-like”; that is, within a hir::Item, hir::TraitItem, or hir::ImplItem. There is no guarantee that the numerical value of a given ItemLocalId corresponds to the node’s position within the owning item in any way, but there is a guarantee that the ItemLocalIds within an owner occupy a dense range of integers starting at zero, so a mapping that maps all or most nodes within an “item-like” to something else can be implemented by a Vec instead of a tree or hash map.
OwnerId

CRATE_HIR_ID: The HirId corresponding to CRATE_NODE_ID and CRATE_DEF_ID.
CRATE_OWNER_ID