adaptivegrain/vapoursynth/src/map/errors.rs
2019-05-30 11:06:53 +00:00

45 lines
1.3 KiB
Rust

use std::ffi::NulError;
use std::result;
/// The error type for `Map` operations.
#[derive(Fail, Debug, Eq, PartialEq)]
pub enum Error {
#[fail(display = "The requested key wasn't found in the map")]
KeyNotFound,
#[fail(display = "The requested index was out of bounds")]
IndexOutOfBounds,
#[fail(display = "The given/requested value type doesn't match the type of the property")]
WrongValueType,
#[fail(display = "The key is invalid")]
InvalidKey(#[cause] InvalidKeyError),
#[fail(display = "Couldn't convert to a CString")]
CStringConversion(#[cause] NulError),
}
/// A specialized `Result` type for `Map` operations.
pub type Result<T> = result::Result<T, Error>;
/// An error indicating the map key is invalid.
#[derive(Fail, Debug, Eq, PartialEq)]
#[cfg_attr(rustfmt, rustfmt_skip)]
pub enum InvalidKeyError {
#[fail(display = "The key is empty")]
EmptyKey,
#[fail(display = "The key contains an invalid character at index {}", _0)]
InvalidCharacter(usize),
}
impl From<InvalidKeyError> for Error {
#[inline]
fn from(x: InvalidKeyError) -> Self {
Error::InvalidKey(x)
}
}
impl From<NulError> for Error {
#[inline]
fn from(x: NulError) -> Self {
Error::CStringConversion(x)
}
}