[][src]Struct rustc_borrowck::dataflow::DataFlowContext

pub struct DataFlowContext<'a, 'tcx: 'a, O> {
    tcx: TyCtxt<'a, 'tcx, 'tcx>,
    analysis_name: &'static str,
    oper: O,
    bits_per_id: usize,
    words_per_id: usize,
    local_id_to_index: FxHashMap<ItemLocalId, Vec<CFGIndex>>,
    gens: Vec<usize>,
    scope_kills: Vec<usize>,
    action_kills: Vec<usize>,
    on_entry: Vec<usize>,
}
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Fields

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a name for the analysis using this dataflow instance

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the data flow operator

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number of bits to propagate per id

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number of words we will use to store bits_per_id. equal to bits_per_id/usize::BITS rounded up.

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bits generated as we exit the cfg node. Updated by add_gen().

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bits killed as we exit the cfg node, or non-locally jump over it. Updated by add_kill(KillFrom::ScopeEnd).

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bits killed as we exit the cfg node directly; if it is jumped over, e.g. via break, the kills are not reflected in the jump's effects. Updated by add_kill(KillFrom::Execution).

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bits that are valid on entry to the cfg node. Updated by propagate().

Methods

impl<'a, 'tcx, O: DataFlowOperator> DataFlowContext<'a, 'tcx, O>
[src]

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impl<'a, 'tcx, O: DataFlowOperator> DataFlowContext<'a, 'tcx, O>
[src]

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Indicates that id generates bit

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Indicates that id kills bit

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Applies the gen and kill sets for cfgidx to bits

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Iterates through each bit that is set on entry to id. Only useful after propagate() has been called.

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Iterates through each bit that is set on entry/exit to cfgidx. Only useful after propagate() has been called.

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Iterates through each bit in the gen set for id.

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Helper for iterating over the bits in a bit set. Returns false on the first call to f that returns false; if all calls to f return true, then returns true.

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Whenever you have a break or continue statement, flow exits through any number of enclosing scopes on its way to the new destination. This function infers the kill bits of those control operators based on the kill bits associated with those scopes.

This is usually called (if it is called at all), after all add_gen and add_kill calls, but before propagate.

impl<'a, 'tcx, O: DataFlowOperator + Clone + 'static> DataFlowContext<'a, 'tcx, O>
[src]

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Performs the data flow analysis.

Trait Implementations

impl<'a, 'tcx: 'a, O: Clone> Clone for DataFlowContext<'a, 'tcx, O>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'a, 'tcx, O: DataFlowOperator> PpAnn for DataFlowContext<'a, 'tcx, O>
[src]

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

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Auto Trait Implementations

impl<'a, 'tcx, O> !Send for DataFlowContext<'a, 'tcx, O>

impl<'a, 'tcx, O> !Sync for DataFlowContext<'a, 'tcx, O>

Blanket Implementations

impl<T> ToOwned for T where
    T: Clone
[src]

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
[src]

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
[src]

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
[src]

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

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
[src]

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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this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<E> SpecializationError for E
[src]

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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

impl<T> MaybeResult for T
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impl<'a, T> Captures for T where
    T: ?Sized
[src]