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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
use core::any;
use core::fmt;
/// A generic error type to be used for decoding slices of ULE types
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[non_exhaustive]
pub enum ZeroVecError {
/// Attempted to parse a buffer into a slice of the given ULE type but its
/// length was not compatible
InvalidLength { ty: &'static str, len: usize },
/// The byte sequence provided for `ty` failed to parse correctly
ParseError { ty: &'static str },
/// The byte buffer was not in the appropriate format for VarZeroVec
VarZeroVecFormatError,
}
impl fmt::Display for ZeroVecError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
match *self {
ZeroVecError::InvalidLength { ty, len } => {
write!(f, "Invalid length {len} for slice of type {ty}")
}
ZeroVecError::ParseError { ty } => {
write!(f, "Could not parse bytes to slice of type {ty}")
}
ZeroVecError::VarZeroVecFormatError => {
write!(f, "Invalid format for VarZeroVec buffer")
}
}
}
}
impl ZeroVecError {
/// Construct a parse error for the given type
pub fn parse<T: ?Sized + 'static>() -> ZeroVecError {
ZeroVecError::ParseError {
ty: any::type_name::<T>(),
}
}
/// Construct an "invalid length" error for the given type and length
pub fn length<T: ?Sized + 'static>(len: usize) -> ZeroVecError {
ZeroVecError::InvalidLength {
ty: any::type_name::<T>(),
len,
}
}
}
#[cfg(feature = "std")]
impl ::std::error::Error for ZeroVecError {}
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