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use std::error;
use std::fmt;
use ndarray::{Ixs, ShapeError};
pub type Result<T> = ::std::result::Result<T, LinalgError>;
#[derive(Debug, EnumError)]
pub enum LinalgError {
NotSquare(NotSquareError),
Lapack(LapackError),
Stride(StrideError),
MemoryCont(MemoryContError),
Shape(ShapeError),
}
#[derive(Debug, new)]
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, new)]
pub struct NotSquareError {
pub rows: i32,
pub cols: i32,
}
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, new)]
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, new)]
pub struct MemoryContError {}
impl fmt::Display for MemoryContError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Memory is not contiguous")
}
}
impl error::Error for MemoryContError {
fn description(&self) -> &str {
"Memory is not contiguous"
}
}