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use crate::css::Value;
#[cfg(feature = "clap")]
use clap;
use nom;
use nom::types::CompleteByteSlice as Input;
use std::convert::From;
use std::path::PathBuf;
use std::string::FromUtf8Error;
use std::{fmt, io};
#[derive(Debug)]
pub enum Error {
Input(PathBuf, io::Error),
IoError(io::Error),
Encoding(FromUtf8Error),
BadValue(String),
BadArguments(String),
ParseError(nom::ErrorKind),
S(String),
UndefinedVariable(String),
}
impl Error {
pub fn bad_value(expected: &str, actual: &Value) -> Self {
Error::BadValue(format!(
"expected {}, got {} = {}",
expected,
actual.type_name(),
actual
))
}
pub fn badarg(expected: &str, actual: &Value) -> Error {
Error::BadArguments(format!(
"expected {}, got {} = {}",
expected,
actual.type_name(),
actual
))
}
pub fn badargs(expected: &[&str], actual: &[&Value]) -> Error {
Error::BadArguments(format!(
"expected {:?}, got {:?}",
expected, actual
))
}
pub fn undefined_variable(name: &str) -> Self {
Error::UndefinedVariable(name.to_string())
}
}
impl fmt::Display for Error {
fn fmt(&self, out: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::S(ref s) => write!(out, "{}", s),
Error::Input(ref p, ref e) => {
write!(out, "Failed to read {:?}: {}", p, e)
}
Error::UndefinedVariable(ref name) => {
write!(out, "Undefined variable: \"${}\"", name)
}
ref x => write!(out, "{:?}", x),
}
}
}
impl From<io::Error> for Error {
fn from(e: io::Error) -> Self {
Error::IoError(e)
}
}
impl From<FromUtf8Error> for Error {
fn from(e: FromUtf8Error) -> Self {
Error::Encoding(e)
}
}
impl From<nom::ErrorKind> for Error {
fn from(e: nom::ErrorKind) -> Self {
Error::ParseError(e)
}
}
impl<'a> From<nom::Err<Input<'a>>> for Error {
fn from(e: nom::Err<Input<'a>>) -> Self {
Error::S(format!("Parse error: {:?}", e))
}
}
#[cfg(feature = "clap")]
impl<'a> From<clap::Error> for Error {
fn from(e: clap::Error) -> Self {
Error::S(format!("{}", e))
}
}