1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98

use core::{ErrorPos, Pos, RpName, RpType, WithPos, errors as core};
use parser::errors as parser;
use repository::errors as repository;
use serde_json as json;

error_chain! {
    links {
        Parser(parser::Error, parser::ErrorKind);
        Core(core::Error, core::ErrorKind);
        Repository(repository::Error, repository::ErrorKind);
    }

    foreign_links {
        Io(::std::io::Error);
        Fmt(::std::fmt::Error);
        Json(json::Error);
        BorrowMutError(::std::cell::BorrowMutError);
        BorrowError(::std::cell::BorrowError);
    }

    errors {
        Pos(message: String, pos: ErrorPos) {
            description("position error")
            display("{}", message)
        }

        /// An instance creation is missing a set of required fields.
        MissingRequired(names: Vec<String>, pos: ErrorPos, fields: Vec<ErrorPos>) {
            description("missing required")
        }

        Overflow(pos: ErrorPos) {
        }

        EnumVariantConflict(pos: ErrorPos, other: ErrorPos) {
            description("enum value conflict")
        }

        FieldConflict(message: String, source: ErrorPos, target: ErrorPos) {
            description("field conflict")
            display("{}", message)
        }

        Errors(errors: Vec<Error>) {
            description("errors")
            display("encountered {} error(s)", errors.len())
        }

        MissingBackend {
        }

        RegisteredTypeConflict(name: RpName) {
            description("registered type conflict")
            display("registered type conflict with: {}", name)
        }

        MissingPrefix(prefix: String) {
            description("missing prefix")
            display("missing prefix: {}", prefix)
        }

        MissingTypeImpl(ty: RpType, suggestion: &'static str) {
            description("missing type implementation")
            display("missing implementation for type `{}`, {}", ty, suggestion)
        }
    }
}

impl Error {
    pub fn pos(message: String, pos: ErrorPos) -> Error {
        ErrorKind::Pos(message, pos).into()
    }
}

impl WithPos for Error {
    fn with_pos<E: Into<ErrorPos>>(self, pos: E) -> Self {
        use self::ErrorKind::*;

        match self.kind() {
            &Pos(..) => self,
            &MissingRequired(..) => self,
            &Overflow(..) => self,
            &EnumVariantConflict(..) => self,
            &FieldConflict(..) => self,
            &Errors(..) => self,
            _ => {
                let message = format!("{}", self);
                self.chain_err(|| ErrorKind::Pos(message, pos.into()))
            }
        }
    }
}

impl<'a> From<(&'a str, Pos)> for Error {
    fn from(value: (&'a str, Pos)) -> Self {
        ErrorKind::Pos(value.0.to_string(), value.1.into()).into()
    }
}