Method end

crates/rustc_codegen_spirv/src/abi.rs:225–262

(
        &self,
        cx: &CodegenCx<'tcx>,
        span: Span,
        pointee: PointeeTy<'tcx>,
        pointee_spv: Word,
    )

    }

    fn end(
        &self,
        cx: &CodegenCx<'tcx>,
        span: Span,
        pointee: PointeeTy<'tcx>,
        pointee_spv: Word,
    ) -> Word {
        match self.map.borrow_mut().entry(pointee) {
            // We should have hit begin() on this type already, which always inserts an entry.
            Entry::Vacant(_) => {
                span_bug!(span, "RecursivePointeeCache::end should always have entry")
            }
            Entry::Occupied(mut entry) => match *entry.get() {
                // State: There have been no recursive references to this type while defining it, and so no
                // OpTypeForwardPointer has been emitted. This is the most common case.
                PointeeDefState::Defining => {
                    let id = SpirvType::Pointer {
                        pointee: pointee_spv,
                    }
                    .def(span, cx);
                    entry.insert(PointeeDefState::Defined(id));
                    id
                }
                // State: There was a recursive reference to this type, and so an OpTypeForwardPointer has been emitted.
                // Make sure to use the same ID.
                PointeeDefState::DefiningWithForward(id) => {
                    entry.insert(PointeeDefState::Defined(id));
                    SpirvType::Pointer {
                        pointee: pointee_spv,
                    }
                    .def_with_id(cx, span, id)
                }
                PointeeDefState::Defined(_) => {
                    span_bug!(span, "RecursivePointeeCache::end defined pointer twice")
                }
            },
        }
    }
}

#[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]