Struct ConnectionMatrix 

pub struct ConnectionMatrix { /* private fields */ }

Connection matrix storing transition costs

Implementations

impl ConnectionMatrix

pub fn from_mmap(mmap: Arc<Mmap>) -> Result<Self>

Load connection matrix from memory-mapped file

Errors

Returns an error if the file is corrupted.

pub fn cost(&self, right_id: u16, left_id: u16) -> i16

Get the connection cost between right and left context IDs

This matches MeCab’s Connector::transition_cost function: return matrix_[rcAttr + lsize_ * lcAttr];

Arguments

• right_id - Right context attribute of the LEFT node
• left_id - Left context attribute of the RIGHT node

pub unsafe fn cost_unchecked(&self, right_id: u16, left_id: u16) -> i16

Get connection cost without bounds checking (hot path optimization)

Safety

The caller must ensure that right_id < rsize and left_id < lsize. Context IDs from validated dictionary entries are always in bounds.

pub fn left_size(&self) -> usize

Get the number of left context IDs

pub fn right_size(&self) -> usize

Get the number of right context IDs

pub fn size(&self) -> usize

Get total number of entries

Trait Implementations

impl Debug for ConnectionMatrix

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

Formats the value using the given formatter.

impl Send for ConnectionMatrix

impl Sync for ConnectionMatrix