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use std::borrow::Cow;
use std::error;
use std::fmt;
use std::io;
use nom::IError;
#[derive(Debug)]
pub enum Error {
IoError(io::Error),
NoFilename,
ParsingIncomplete,
ParsingError,
DecodeError(Cow<'static, str>),
}
impl From<IError> for Error {
fn from(error: IError) -> Self {
match error {
IError::Error(_) => Error::ParsingError,
_ => Error::ParsingIncomplete,
}
}
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Self {
Error::IoError(error)
}
}
impl From<Cow<'static, str>> for Error {
fn from(error: Cow<'static, str>) -> Self {
Error::DecodeError(error)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::IoError(ref x) => x.fmt(f),
Error::NoFilename => write!(f, "The plugin path has no filename part"),
Error::ParsingIncomplete => write!(f, "More input was expected by the plugin parser"),
Error::ParsingError => {
write!(f, "{}", "An error was encountered while parsing a plugin")
}
Error::DecodeError(_) => {
write!(
f,
"{}",
"Plugin string content could not be decoded from Windows-1252"
)
}
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::IoError(ref x) => x.description(),
Error::NoFilename => "The plugin path has no filename part",
Error::ParsingIncomplete => "More input was expected by the plugin parser",
Error::ParsingError => "An error was encountered while parsing a plugin",
Error::DecodeError(_) => "Plugin string content could not be decoded from Windows-1252",
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::IoError(ref x) => Some(x),
Error::NoFilename => None,
Error::ParsingIncomplete => None,
Error::ParsingError => None,
Error::DecodeError(_) => None,
}
}
}