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flow_pacmap/
error.rs

1//! Error types for flow-pacmap.
2
3use thiserror::Error;
4
5#[derive(Debug, Error)]
6pub enum PaCMAPError {
7    #[error("Dataset too small: need at least 2 points, got {n}")]
8    DatasetTooSmall { n: usize },
9
10    #[error("Dimension mismatch: data slice length {len} is not divisible by d={d}")]
11    DimensionMismatch { len: usize, d: usize },
12
13    #[error("n={n} exceeds u32::MAX — indices would overflow pair storage")]
14    DatasetTooLarge { n: usize },
15
16    #[error("Pair count overflow: n={n} × k={k} would overflow usize")]
17    PairCountOverflow { n: usize, k: usize },
18
19    #[error(
20        "Insufficient memory: embedding requires ~{required_bytes} bytes but only \
21         {available_bytes} bytes are available"
22    )]
23    InsufficientMemory {
24        required_bytes: usize,
25        available_bytes: usize,
26    },
27
28    #[error("KNN method not implemented: {method}")]
29    MethodNotImplemented { method: String },
30
31    #[error("KNN index error: {0}")]
32    KnnIndex(String),
33
34    #[error("PCA failed: {0}")]
35    Pca(String),
36
37    #[error("Run cancelled by caller")]
38    Cancelled,
39}