cbindgen/bindgen/
error.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5use std::error;
6use std::fmt;
7
8pub use crate::bindgen::cargo::cargo_expand::Error as CargoExpandError;
9pub use crate::bindgen::cargo::cargo_metadata::Error as CargoMetadataError;
10pub use crate::bindgen::cargo::cargo_toml::Error as CargoTomlError;
11pub use syn::parse::Error as ParseError;
12
13#[derive(Debug)]
14#[allow(clippy::enum_variant_names)]
15pub enum Error {
16    CargoMetadata(String, CargoMetadataError),
17    CargoToml(String, CargoTomlError),
18    CargoExpand(String, CargoExpandError),
19    ParseSyntaxError {
20        crate_name: String,
21        src_path: String,
22        error: ParseError,
23    },
24    ParseCannotOpenFile {
25        crate_name: String,
26        src_path: String,
27    },
28}
29
30impl fmt::Display for Error {
31    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
32        match *self {
33            Error::CargoMetadata(ref path, ref error) => write!(
34                f,
35                "Couldn't execute `cargo metadata` with manifest {:?}: {:?}",
36                path, error
37            ),
38            Error::CargoToml(ref path, ref error) => {
39                write!(f, "Couldn't load manifest file {:?}: {:?}", path, error)
40            }
41            Error::CargoExpand(ref crate_name, ref error) => write!(
42                f,
43                "Parsing crate `{}`: couldn't run `cargo rustc -Zunpretty=expanded`: {:?}",
44                crate_name, error
45            ),
46            Error::ParseSyntaxError {
47                ref crate_name,
48                ref src_path,
49                ref error,
50            } => {
51                write!(
52                    f,
53                    "Parsing crate `{}`:`{}`:\n{:?}",
54                    crate_name, src_path, error
55                )?;
56
57                if !src_path.is_empty() {
58                    write!(
59                        f,
60                        "\nTry running `rustc -Z parse-only {}` to see a nicer error message",
61                        src_path,
62                    )?
63                }
64                Ok(())
65            }
66            Error::ParseCannotOpenFile {
67                ref crate_name,
68                ref src_path,
69            } => write!(
70                f,
71                "Parsing crate `{}`: cannot open file `{}`.",
72                crate_name, src_path
73            ),
74        }
75    }
76}
77
78impl error::Error for Error {
79    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
80        match self {
81            Error::CargoMetadata(_, ref error) => Some(error),
82            Error::CargoToml(_, ref error) => Some(error),
83            Error::CargoExpand(_, ref error) => Some(error),
84            Error::ParseSyntaxError { ref error, .. } => Some(error),
85            Error::ParseCannotOpenFile { .. } => None,
86        }
87    }
88}
cbindgen/bindgen/error.rs

cbindgen/bindgen/
error.rs
