[][src]Struct rustc::dep_graph::graph::DepGraph

pub struct DepGraph {
    data: Option<Lrc<DepGraphData>>,
    fingerprints: Lrc<Lock<IndexVec<DepNodeIndex, Fingerprint>>>,
}
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Fields

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Methods

impl DepGraph
[src]

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True if we are actually building the full dep-graph.

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Starts a new dep-graph task. Dep-graph tasks are specified using a free function (task) and not a closure -- this is intentional because we want to exercise tight control over what state they have access to. In particular, we want to prevent implicit 'leaks' of tracked state into the task (which could then be read without generating correct edges in the dep-graph -- see the rustc guide for more details on the dep-graph). To this end, the task function gets exactly two pieces of state: the context cx and an argument arg. Both of these bits of state must be of some type that implements DepGraphSafe and hence does not leak.

The choice of two arguments is not fundamental. One argument would work just as well, since multiple values can be collected using tuples. However, using two arguments works out to be quite convenient, since it is common to need a context (cx) and some argument (e.g., a DefId identifying what item to process).

For cases where you need some other number of arguments:

  • If you only need one argument, just use () for the arg parameter.
  • If you need 3+ arguments, use a tuple for the arg parameter.

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Creates a new dep-graph input with value input

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Execute something within an "anonymous" task, that is, a task the DepNode of which is determined by the list of inputs it read from.

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Execute something within an "eval-always" task which is a task

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Check whether a previous work product exists for v and, if so, return the path that leads to it. Used to skip doing work.

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Access the map of work-products created during the cached run. Only used during saving of the dep-graph.

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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Trait Implementations

impl Clone for DepGraph
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Auto Trait Implementations

impl !Send for DepGraph

impl !Sync for DepGraph

Blanket Implementations

impl<T> MaybeResult for T
[src]

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impl<'a, T> Captures for T where
    T: ?Sized
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impl<T> ToOwned for T where
    T: Clone
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Creates owned data from borrowed data, usually by cloning. Read more

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recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
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Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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Gets the TypeId of self. Read more

impl<E> SpecializationError for E
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
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impl<T> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T