fn insert()

in tools/hakari/src/hakari.rs [1171:1268]
87 lines of code
10 McCabe index (conditional complexity)

    fn insert(
        self,
        output_single_feature: bool,
        unify_target_host: UnifyTargetHostImpl,
        mut insert_cb: impl FnMut(BuildPlatform, &'a ComputedInnerMap<'g>),
    ) {
        use BuildPlatform::*;

        match self {
            ValueDescribe::None => {
                // Empty, ignore. (This should probably never happen anyway.)
            }
            ValueDescribe::SingleTarget(target_inner) => {
                // Just one way to unify these.
                if output_single_feature {
                    insert_cb(Target, target_inner);
                    if unify_target_host == UnifyTargetHostImpl::ReplicateTargetOnHost {
                        insert_cb(Host, target_inner);
                    }
                }
            }
            ValueDescribe::SingleHost(host_inner) => {
                // Just one way to unify other.
                if output_single_feature {
                    insert_cb(Host, host_inner);
                }
            }
            ValueDescribe::MultiTarget(target_inner) => {
                // Unify features for target.
                insert_cb(Target, target_inner);
                if unify_target_host == UnifyTargetHostImpl::ReplicateTargetOnHost {
                    insert_cb(Host, target_inner);
                }
            }
            ValueDescribe::MultiHost(host_inner) => {
                // Unify features for host.
                insert_cb(Host, host_inner);
            }
            ValueDescribe::SingleMatchingBoth {
                target_inner,
                host_inner,
            } => {
                // Just one way to unify across both.
                if output_single_feature {
                    insert_cb(Target, target_inner);
                    insert_cb(Host, host_inner);
                }
            }
            ValueDescribe::SingleNonMatchingBoth {
                target_inner,
                host_inner,
            } => {
                // Unify features for both across both.
                insert_cb(Target, target_inner);
                insert_cb(Host, host_inner);
                if unify_target_host != UnifyTargetHostImpl::None {
                    insert_cb(Target, host_inner);
                    insert_cb(Host, target_inner);
                }
            }
            ValueDescribe::MultiTargetSingleHost {
                target_inner,
                host_inner,
            } => {
                // Unify features for both across both.
                insert_cb(Target, target_inner);
                insert_cb(Host, host_inner);
                if unify_target_host != UnifyTargetHostImpl::None {
                    insert_cb(Target, host_inner);
                    insert_cb(Host, target_inner);
                }
            }
            ValueDescribe::MultiHostSingleTarget {
                target_inner,
                host_inner,
            } => {
                // Unify features for both across both.
                insert_cb(Target, target_inner);
                insert_cb(Host, host_inner);
                if unify_target_host != UnifyTargetHostImpl::None {
                    insert_cb(Target, host_inner);
                    insert_cb(Host, target_inner);
                }
            }
            ValueDescribe::MultiBoth {
                target_inner,
                host_inner,
            } => {
                // Unify features for both across both.
                insert_cb(Target, target_inner);
                insert_cb(Host, host_inner);
                if unify_target_host != UnifyTargetHostImpl::None {
                    insert_cb(Target, host_inner);
                    insert_cb(Host, target_inner);
                }
            }
        }
    }