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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use std::error;
use std::fmt;
pub use crate::bindgen::cargo::cargo_expand::Error as CargoExpandError;
pub use crate::bindgen::cargo::cargo_metadata::Error as CargoMetadataError;
pub use crate::bindgen::cargo::cargo_toml::Error as CargoTomlError;
pub use syn::parse::Error as ParseError;
#[derive(Debug)]
#[allow(clippy::enum_variant_names)]
pub enum Error {
CargoMetadata(String, CargoMetadataError),
CargoToml(String, CargoTomlError),
CargoExpand(String, CargoExpandError),
ParseSyntaxError {
crate_name: String,
src_path: String,
error: ParseError,
},
ParseCannotOpenFile {
crate_name: String,
src_path: String,
},
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::CargoMetadata(ref path, ref error) => write!(
f,
"Couldn't execute `cargo metadata` with manifest {:?}: {:?}",
path, error
),
Error::CargoToml(ref path, ref error) => {
write!(f, "Couldn't load manifest file {:?}: {:?}", path, error)
}
Error::CargoExpand(ref crate_name, ref error) => write!(
f,
"Parsing crate `{}`: couldn't run `cargo rustc -Zunpretty=expanded`: {:?}",
crate_name, error
),
Error::ParseSyntaxError {
ref crate_name,
ref src_path,
ref error,
} => {
write!(
f,
"Parsing crate `{}`:`{}`:\n{:?}",
crate_name, src_path, error
)?;
if !src_path.is_empty() {
write!(
f,
"\nTry running `rustc -Z parse-only {}` to see a nicer error message",
src_path,
)?
}
Ok(())
}
Error::ParseCannotOpenFile {
ref crate_name,
ref src_path,
} => write!(
f,
"Parsing crate `{}`: cannot open file `{}`.",
crate_name, src_path
),
}
}
}
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match self {
Error::CargoMetadata(_, ref error) => Some(error),
Error::CargoToml(_, ref error) => Some(error),
Error::CargoExpand(_, ref error) => Some(error),
Error::ParseSyntaxError { ref error, .. } => Some(error),
Error::ParseCannotOpenFile { .. } => None,
}
}
}
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