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Document opt_local_def_id

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Santiago Pastorino 2022-08-03 17:26:38 -03:00
parent 966269a464
commit c946cdceb4
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compiler/rustc_ast_lowering/src/lib.rs
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@ -482,6 +482,17 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
start start
} }
/// Given the id of some node in the AST, finds the `LocalDefId` associated with it by the name
/// resolver (if any), after applying any remapping from `get_remapped_def_id`.
///
/// For example: for each captured lifetime (e.g., 'a), we create a new lifetime parameter that is a generic
/// defined on the TAIT, so we have type Foo<'a1> = ... and we establish a mapping from the
/// original parameter 'a to the new parameter 'a1.
///
/// This method will return, given `'a` node id, `'a1` def id, going through, as a mid step,
/// the def_id of `'a`.
/// For cases when there are no mappings, it will just return the def_id that correspond to the
/// given node_id.
fn opt_local_def_id(&self, node: NodeId) -> Option<LocalDefId> { fn opt_local_def_id(&self, node: NodeId) -> Option<LocalDefId> {
self.resolver self.resolver
.node_id_to_def_id .node_id_to_def_id