aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_syntax/src/syntax_node/syntax_error.rs
blob: 4ff99809066a9610653905ea2bd936bd035a584b (plain)
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
use std::fmt;

use crate::{TextRange, TextUnit};

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct SyntaxError {
    kind: SyntaxErrorKind,
    location: Location,
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Location {
    Offset(TextUnit),
    Range(TextRange),
}

impl Into<Location> for TextUnit {
    fn into(self) -> Location {
        Location::Offset(self)
    }
}

impl Into<Location> for TextRange {
    fn into(self) -> Location {
        Location::Range(self)
    }
}

impl SyntaxError {
    pub fn new<L: Into<Location>>(kind: SyntaxErrorKind, loc: L) -> SyntaxError {
        SyntaxError { kind, location: loc.into() }
    }

    pub fn kind(&self) -> SyntaxErrorKind {
        self.kind.clone()
    }

    pub fn location(&self) -> Location {
        self.location.clone()
    }

    pub fn offset(&self) -> TextUnit {
        match self.location {
            Location::Offset(offset) => offset,
            Location::Range(range) => range.start(),
        }
    }

    pub fn add_offset(mut self, plus_offset: TextUnit) -> SyntaxError {
        self.location = match self.location {
            Location::Range(range) => Location::Range(range + plus_offset),
            Location::Offset(offset) => Location::Offset(offset + plus_offset),
        };

        self
    }
}

impl fmt::Display for SyntaxError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        self.kind.fmt(f)
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum SyntaxErrorKind {
    ParseError(ParseError),
    UnescapedCodepoint,
    EmptyChar,
    UnclosedChar,
    OverlongChar,
    EmptyByte,
    UnclosedByte,
    OverlongByte,
    ByteOutOfRange,
    UnescapedByte,
    EmptyByteEscape,
    InvalidByteEscape,
    TooShortByteCodeEscape,
    MalformedByteCodeEscape,
    UnicodeEscapeForbidden,
    EmptyAsciiEscape,
    InvalidAsciiEscape,
    TooShortAsciiCodeEscape,
    AsciiCodeEscapeOutOfRange,
    MalformedAsciiCodeEscape,
    UnclosedUnicodeEscape,
    MalformedUnicodeEscape,
    EmptyUnicodeEcape,
    OverlongUnicodeEscape,
    UnicodeEscapeOutOfRange,
    UnclosedString,
    InvalidSuffix,
    InvalidBlockAttr,
    InvalidMatchInnerAttr,
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ParseError(pub String);

impl fmt::Display for SyntaxErrorKind {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        use self::SyntaxErrorKind::*;
        match self {
            UnescapedCodepoint => write!(f, "This codepoint should always be escaped"),
            EmptyAsciiEscape => write!(f, "Empty escape sequence"),
            InvalidAsciiEscape => write!(f, "Invalid escape sequence"),
            EmptyChar => write!(f, "Empty char literal"),
            UnclosedChar => write!(f, "Unclosed char literal"),
            OverlongChar => write!(f, "Char literal should be one character long"),
            EmptyByte => write!(f, "Empty byte literal"),
            UnclosedByte => write!(f, "Unclosed byte literal"),
            OverlongByte => write!(f, "Byte literal should be one character long"),
            ByteOutOfRange => write!(f, "Byte should be a valid ASCII character"),
            UnescapedByte => write!(f, "This byte should always be escaped"),
            EmptyByteEscape => write!(f, "Empty escape sequence"),
            InvalidByteEscape => write!(f, "Invalid escape sequence"),
            TooShortByteCodeEscape => write!(f, "Escape sequence should have two digits"),
            MalformedByteCodeEscape => write!(f, "Escape sequence should be a hexadecimal number"),
            UnicodeEscapeForbidden => {
                write!(f, "Unicode escapes are not allowed in byte literals or byte strings")
            }
            TooShortAsciiCodeEscape => write!(f, "Escape sequence should have two digits"),
            AsciiCodeEscapeOutOfRange => {
                write!(f, "Escape sequence should be between \\x00 and \\x7F")
            }
            MalformedAsciiCodeEscape => write!(f, "Escape sequence should be a hexadecimal number"),
            UnclosedUnicodeEscape => write!(f, "Missing `}}`"),
            MalformedUnicodeEscape => write!(f, "Malformed unicode escape sequence"),
            EmptyUnicodeEcape => write!(f, "Empty unicode escape sequence"),
            OverlongUnicodeEscape => {
                write!(f, "Unicode escape sequence should have at most 6 digits")
            }
            UnicodeEscapeOutOfRange => write!(f, "Unicode escape code should be at most 0x10FFFF"),
            UnclosedString => write!(f, "Unclosed string literal"),
            InvalidSuffix => write!(f, "Invalid literal suffix"),
            InvalidBlockAttr => {
                write!(f, "A block in this position cannot accept inner attributes")
            }
            InvalidMatchInnerAttr => {
                write!(f, "Inner attributes are only allowed directly after the opening brace of the match expression")
            }
            ParseError(msg) => write!(f, "{}", msg.0),
        }
    }
}