Module user_ty 

Helper code for building a linked list of user-type projections on the stack while visiting a THIR pattern.

This avoids having to repeatedly clone a partly-built UserTypeProjections at every step of the traversal, which is what the previous code was doing.

Re-exports

use std::assert_matches; 🔒

use std::iter; 🔒

use rustc_abi::FieldIdx; 🔒

use rustc_abi::VariantIdx; 🔒

use rustc_data_structures::smallvec::SmallVec; 🔒

use rustc_middle::mir::ProjectionElem; 🔒

use rustc_middle::mir::UserTypeProjection; 🔒

use rustc_middle::mir::UserTypeProjections; 🔒

use rustc_middle::ty::AdtDef; 🔒

use rustc_middle::ty::UserTypeAnnotationIndex; 🔒

use rustc_span::Symbol; 🔒

Enums

ProjectedUserTypesNode 🔒

ProjectedUserTypesOp 🔒

One of a list of “operations” that can be used to lazily build projections of user-specified types.

Type Aliases

UserTypeIndices 🔒

A single thir::Pat node should almost never have more than 0-2 user types. We can store up to 4 inline in the same size as an ordinary Vec.