Struct rustc_data_structures::bitvec::SparseBitMatrix

pub struct SparseBitMatrix<R, C> where
    R: Idx,
    C: Idx,  {
    columns: usize,
    vector: IndexVec<R, BitVector<C>>,
}

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

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A moderately sparse bit matrix: rows are appended lazily, but columns within appended rows are instantiated fully upon creation.

Fields

columns: usize

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

vector: IndexVec<R, BitVector<C>>

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Methods

impl<R: Idx, C: Idx> SparseBitMatrix<R, C>

pub fn new(columns: usize) -> Self

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

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Create a new empty sparse bit matrix with no rows or columns.

fn ensure_row(&mut self, row: R)

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

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pub fn add(&mut self, row: R, column: C) -> bool

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

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Sets the cell at (row, column) to true. Put another way, insert column to the bitset for row.

Returns true if this changed the matrix, and false otherwise.

pub fn contains(&self, row: R, column: C) -> bool

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

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Do the bits from row contain column? Put another way, is the matrix cell at (row, column) true? Put yet another way, if the matrix represents (transitive) reachability, can row reach column?

pub fn merge(&mut self, read: R, write: R) -> bool

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

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Add the bits from row read to the bits from row write, return true if anything changed.

This is used when computing transitive reachability because if you have an edge write -> read, because in that case write can reach everything that read can (and potentially more).

pub fn merge_into(&mut self, into: R, from: &BitVector<C>) -> bool

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

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Merge a row, from, into the into row.

pub fn add_all(&mut self, row: R)

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

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Add all bits to the given row.

pub fn len(&self) -> usize

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

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Number of elements in the matrix.

pub fn rows(&self) ->

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

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pub fn iter<'a>(&'a self, row: R) -> <'a>

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Iterates through all the columns set to true in a given row of the matrix.

pub fn iter_enumerated<'a>(&'a self) -> <'a>

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

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Iterates through each row and the accompanying bit set.

pub fn row(&self, row: R) -> Option<&BitVector<C>>

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

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Trait Implementations

impl<R: Clone, C: Clone> Clone for SparseBitMatrix<R, C> where     R: Idx,     C: Idx,

fn clone(&self) -> SparseBitMatrix<R, C>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<R: Debug, C: Debug> Debug for SparseBitMatrix<R, C> where     R: Idx,     C: Idx,

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

Formats the value using the given formatter.