use std::path::Path;
use std::io;
use std::fmt::{self, Display, Formatter};
use std::str::{Utf8Error, ParseBoolError};
use std::num::ParseIntError;
use hex::FromHexError;
#[derive(Debug)]
pub enum ErrorKind {
Invalid,
Module,
Format,
}
#[derive(Debug)]
pub struct Error {
kind: ErrorKind,
message: String,
source: Option<Box<dyn std::error::Error>>,
}
impl Error {
pub(super) fn invalid(source: &str, reason: &str) -> Self {
Self {
kind: ErrorKind::Invalid,
message: format!("attempted to interpret an invalid parse tree ({}, {})", source, reason),
source: None,
}
}
pub(super) fn missing_module(error: io::Error, path: &Path) -> Self {
Self {
kind: ErrorKind::Module,
message: format!("could not locate module \"{}\"", path.display()),
source: Some(Box::new(error)),
}
}
pub(super) fn color_format() -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("named color literal is invalid"),
source: None,
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
self.message.fmt(f)
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
self.source.as_ref().map(|b| &**b)
}
}
impl From<Utf8Error> for Error {
fn from(error: Utf8Error) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("file does not contain valid utf8"),
source: Some(Box::new(error)),
}
}
}
impl From<ParseIntError> for Error {
fn from(error: ParseIntError) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("integer literal is invalid"),
source: Some(Box::new(error)),
}
}
}
impl From<ParseBoolError> for Error {
fn from(error: ParseBoolError) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("boolean literal is invalid"),
source: Some(Box::new(error)),
}
}
}
impl From<FromHexError> for Error {
fn from(error: FromHexError) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("hex color literal is invalid"),
source: Some(Box::new(error)),
}
}
}
impl From<enquote::Error> for Error {
fn from(error: enquote::Error) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("string literal is quoted incorrectly"),
source: Some(Box::new(error)),
}
}
}
impl From<regex::Error> for Error {
fn from(error: regex::Error) -> Self {
Self {
kind: ErrorKind::Format,
message: String::from("regex literal is invalid"),
source: Some(Box::new(error)),
}
}
}
pub type Result<T> = std::result::Result<T, Error>;