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use std::fmt;
use std::error::Error;
use super::{
Ix,
};
#[derive(Clone, Debug)]
pub enum ShapeError {
IncompatibleShapes(Box<[Ix]>, Box<[Ix]>),
IncompatibleLayout,
DimensionTooLarge(Box<[Ix]>),
}
impl Error for ShapeError {
fn description(&self) -> &str {
match *self {
ShapeError::IncompatibleShapes(..) =>
"incompatible shapes in reshape",
ShapeError::IncompatibleLayout =>
"incompatible layout: not not contiguous",
ShapeError::DimensionTooLarge(..) =>
"dimension too large",
}
}
}
impl fmt::Display for ShapeError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
ShapeError::IncompatibleShapes(ref a, ref b) => {
write!(f, "incompatible shapes, attempted from: {:?}, to: {:?}",
a, b)
}
ShapeError::IncompatibleLayout => {
write!(f, "{}", self.description())
}
ShapeError::DimensionTooLarge(ref a) => {
write!(f, "dimension too large in shape {:?}", a)
}
}
}
}