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use crate::path::GenericPath;
type ParseError<'a> =
lalrpop_util::ParseError<usize, lalrpop_util::lexer::Token<'a>, &'a str>;
#[derive(Debug)]
pub enum Error {
IO(std::io::Error),
Parse(String),
PathListHasEmptyComponents(String),
PathIsAFile(GenericPath),
PathIsRelative(GenericPath),
PathInvalid(GenericPath),
}
impl std::error::Error for Error { }
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Error::IO(e) => e.fmt(f),
Error::Parse(e) => e.fmt(f),
Error::PathListHasEmptyComponents(path_list) =>
f.write_fmt(format_args!(
"Path list has empty components: {}",
path_list)),
Error::PathIsAFile(path) =>
f.write_fmt(format_args!(
"There's a file at {}, not a directory.",
path)),
Error::PathIsRelative(path) =>
f.write_fmt(format_args!(
"The path {} is relative, not absolute.",
path)),
Error::PathInvalid(path) =>
f.write_fmt(format_args!(
"This isn't a valid path. {}",
path)),
}
}
}
impl From<std::io::Error> for Error {
fn from(e: std::io::Error) -> Error {
Error::IO(e)
}
}
impl From<ParseError<'_>> for Error {
fn from(e: ParseError<'_>) -> Error {
Error::Parse(format!("{}", e))
}
}
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