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
use std::error;
use std::fmt;
use std::io;
use std::num;
#[derive(Debug)]
pub enum GridErrorKind {
OutOfBoundCoords,
}
impl fmt::Display for GridErrorKind {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
GridErrorKind::OutOfBoundCoords => write!(f, "Error: out of bound index"),
}
}
}
impl error::Error for GridErrorKind {
fn description(&self) -> &str {
match *self {
GridErrorKind::OutOfBoundCoords => "out of bound index",
}
}
fn cause(&self) -> Option<&error::Error> {
None
}
}
#[derive(Debug)]
pub enum FileParsingErrorKind {
UnknownFormat,
IoError,
IncompleteFile,
RuleParsingError,
CoordParsingError,
OutOfBoundCoords(GridErrorKind),
}
impl fmt::Display for FileParsingErrorKind {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
FileParsingErrorKind::UnknownFormat => write!(f, "Unknown file format"),
FileParsingErrorKind::IoError => write!(f, "IO error"),
FileParsingErrorKind::IncompleteFile => write!(f, "Incomplete or empty file"),
FileParsingErrorKind::RuleParsingError => write!(f, "Invalid ruleset"),
FileParsingErrorKind::CoordParsingError => write!(f, "Invalid coordinates"),
FileParsingErrorKind::OutOfBoundCoords(ref err) => write!(f, "{}", err),
}
}
}
impl error::Error for FileParsingErrorKind {
fn description(&self) -> &str {
match *self {
FileParsingErrorKind::UnknownFormat => "unknown file format",
FileParsingErrorKind::IoError => "IO error",
FileParsingErrorKind::IncompleteFile => "incomplete or empty file",
FileParsingErrorKind::RuleParsingError => "invalid ruleset",
FileParsingErrorKind::CoordParsingError => "invalid coordinates",
FileParsingErrorKind::OutOfBoundCoords(ref err) => err.description(),
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
FileParsingErrorKind::OutOfBoundCoords(ref err) => err.cause(),
_ => None,
}
}
}
impl From<io::Error> for FileParsingErrorKind {
fn from(_: io::Error) -> FileParsingErrorKind {
FileParsingErrorKind::IoError
}
}
impl From<num::ParseIntError> for FileParsingErrorKind {
fn from(_: num::ParseIntError) -> FileParsingErrorKind {
FileParsingErrorKind::CoordParsingError
}
}
impl From<GridErrorKind> for FileParsingErrorKind {
fn from(err: GridErrorKind) -> FileParsingErrorKind {
FileParsingErrorKind::OutOfBoundCoords(err)
}
}