Enum TaskDepsRef

pub enum TaskDepsRef<'a> {
    Allow(&'a Lock<TaskDeps>),
    EvalAlways,
    Ignore,
    Forbid,
}

Variants

Allow(&'a Lock<TaskDeps>)

New dependencies can be added to the TaskDeps. This is used when executing a ‘normal’ query (no eval_always modifier)

EvalAlways

This is used when executing an eval_always query. We don’t need to track dependencies for a query that’s always re-executed – but we need to know that this is an eval_always query in order to emit dependencies to DepNodeIndex::FOREVER_RED_NODE when directly feeding other queries.

Ignore

New dependencies are ignored. This is also used for dep_graph.with_ignore.

Forbid

Any attempt to add new dependencies will cause a panic. This is used when decoding a query result from disk, to ensure that the decoding process doesn’t itself require the execution of any queries.

Trait Implementations

impl<'a> Clone for TaskDepsRef<'a>

fn clone(&self) -> TaskDepsRef<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for TaskDepsRef<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Copy for TaskDepsRef<'a>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes

Size for each variant:

• Allow: 8 bytes
• EvalAlways: 0 bytes
• Ignore: 0 bytes
• Forbid: 0 bytes