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use std::fmt;
#[cfg(feature="std")]
use std::any::Any;
#[cfg(feature="std")]
use std::error::Error;
/// Error value indicating insufficient capacity
#[derive(Clone, Copy, Eq, Ord, PartialEq, PartialOrd)]
pub struct CapacityError<T = ()> {
element: T,
}
impl<T> CapacityError<T> {
/// Create a new `CapacityError` from `element`.
pub const fn new(element: T) -> CapacityError<T> {
CapacityError {
element: element,
}
}
/// Extract the overflowing element
pub fn element(self) -> T {
self.element
}
/// Convert into a `CapacityError` that does not carry an element.
pub fn simplify(self) -> CapacityError {
CapacityError { element: () }
}
}
const CAPERROR: &'static str = "insufficient capacity";
#[cfg(feature="std")]
/// Requires `features="std"`.
impl<T: Any> Error for CapacityError<T> {}
impl<T> fmt::Display for CapacityError<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", CAPERROR)
}
}
impl<T> fmt::Debug for CapacityError<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}: {}", "CapacityError", CAPERROR)
}
}