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use std::error;
use std::fmt;
use ndarray::Ixs;
#[derive(Debug)]
pub struct LapackError {
pub return_code: i32,
}
impl fmt::Display for LapackError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "LAPACK: return_code = {}", self.return_code)
}
}
impl error::Error for LapackError {
fn description(&self) -> &str {
"LAPACK subroutine returns non-zero code"
}
}
impl From<i32> for LapackError {
fn from(code: i32) -> LapackError {
LapackError { return_code: code }
}
}
#[derive(Debug)]
pub struct NotSquareError {
pub rows: usize,
pub cols: usize,
}
impl fmt::Display for NotSquareError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Not square: rows({}) != cols({})", self.rows, self.cols)
}
}
impl error::Error for NotSquareError {
fn description(&self) -> &str {
"Matrix is not square"
}
}
#[derive(Debug)]
pub struct StrideError {
pub s0: Ixs,
pub s1: Ixs,
}
impl fmt::Display for StrideError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "invalid stride: s0={}, s1={}", self.s0, self.s1)
}
}
impl error::Error for StrideError {
fn description(&self) -> &str {
"invalid stride"
}
}
#[derive(Debug)]
pub enum LinalgError {
NotSquare(NotSquareError),
Lapack(LapackError),
Stride(StrideError),
}
impl fmt::Display for LinalgError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
LinalgError::NotSquare(ref err) => err.fmt(f),
LinalgError::Lapack(ref err) => err.fmt(f),
LinalgError::Stride(ref err) => err.fmt(f),
}
}
}
impl error::Error for LinalgError {
fn description(&self) -> &str {
match *self {
LinalgError::NotSquare(ref err) => err.description(),
LinalgError::Lapack(ref err) => err.description(),
LinalgError::Stride(ref err) => err.description(),
}
}
}
impl From<NotSquareError> for LinalgError {
fn from(err: NotSquareError) -> LinalgError {
LinalgError::NotSquare(err)
}
}
impl From<LapackError> for LinalgError {
fn from(err: LapackError) -> LinalgError {
LinalgError::Lapack(err)
}
}
impl From<StrideError> for LinalgError {
fn from(err: StrideError) -> LinalgError {
LinalgError::Stride(err)
}
}