luars 0.17.0

A library for lua 5.5 runtime implementation in Rust
Documentation 
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190

use core::fmt;

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(u16)]
pub enum LuaTokenKind {
    None,
    // KeyWord
    TkAnd,
    TkBreak,
    TkDo,
    TkElse,
    TkElseIf,
    TkEnd,
    TkFalse,
    TkFor,
    TkFunction,
    TkGoto,
    TkIf,
    TkIn,
    TkLocal,
    TkNil,
    TkNot,
    TkOr,
    TkRepeat,
    TkReturn,
    TkThen,
    TkTrue,
    TkUntil,
    TkWhile,

    TkWhitespace, // whitespace
    TkEndOfLine,  // end of line
    TkPlus,       // +
    TkMinus,      // -
    TkMul,        // *
    TkDiv,        // /
    TkIDiv,       // //
    TkDot,        // .
    TkConcat,     // ..
    TkDots,       // ...
    TkComma,      // ,
    TkAssign,     // =
    TkEq,         // ==
    TkGe,         // >=
    TkLe,         // <=
    TkNe,         // ~=
    TkShl,        // <<
    TkShr,        // >>
    TkLt,         // <
    TkGt,         // >
    TkMod,        // %
    TkPow,        // ^
    TkLen,        // #
    TkBitAnd,     // &
    TkBitOr,      // |
    TkBitXor,     // ~
    TkColon,      // :
    TkDbColon,    // ::
    TkSemicolon,  // ;

    TkLeftBracket,  // [
    TkRightBracket, // ]
    TkLeftParen,    // (
    TkRightParen,   // )
    TkLeftBrace,    // {
    TkRightBrace,   // }
    TkComplex,      // complex
    TkInt,          // int
    TkFloat,        // float

    TkName,         // name
    TkString,       // string
    TkLongString,   // long string
    TkShortComment, // short comment
    TkLongComment,  // long comment
    TkShebang,      // shebang
    TkEof,          // eof

    TkUnknown, // unknown
}

impl fmt::Display for LuaTokenKind {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.to_user_string())
    }
}

impl LuaTokenKind {
    /// Convert token kind to user-readable string (like Lua's luaX_token2str)
    pub fn to_user_string(&self) -> &'static str {
        match self {
            // Keywords
            LuaTokenKind::TkAnd => "and",
            LuaTokenKind::TkBreak => "break",
            LuaTokenKind::TkDo => "do",
            LuaTokenKind::TkElse => "else",
            LuaTokenKind::TkElseIf => "elseif",
            LuaTokenKind::TkEnd => "end",
            LuaTokenKind::TkFalse => "false",
            LuaTokenKind::TkFor => "for",
            LuaTokenKind::TkFunction => "function",
            LuaTokenKind::TkGoto => "goto",
            LuaTokenKind::TkIf => "if",
            LuaTokenKind::TkIn => "in",
            LuaTokenKind::TkLocal => "local",
            LuaTokenKind::TkNil => "nil",
            LuaTokenKind::TkNot => "not",
            LuaTokenKind::TkOr => "or",
            LuaTokenKind::TkRepeat => "repeat",
            LuaTokenKind::TkReturn => "return",
            LuaTokenKind::TkThen => "then",
            LuaTokenKind::TkTrue => "true",
            LuaTokenKind::TkUntil => "until",
            LuaTokenKind::TkWhile => "while",
            // Symbols
            LuaTokenKind::TkPlus => "+",
            LuaTokenKind::TkMinus => "-",
            LuaTokenKind::TkMul => "*",
            LuaTokenKind::TkDiv => "/",
            LuaTokenKind::TkIDiv => "//",
            LuaTokenKind::TkDot => ".",
            LuaTokenKind::TkConcat => "..",
            LuaTokenKind::TkDots => "...",
            LuaTokenKind::TkComma => ",",
            LuaTokenKind::TkAssign => "=",
            LuaTokenKind::TkEq => "==",
            LuaTokenKind::TkGe => ">=",
            LuaTokenKind::TkLe => "<=",
            LuaTokenKind::TkNe => "~=",
            LuaTokenKind::TkShl => "<<",
            LuaTokenKind::TkShr => ">>",
            LuaTokenKind::TkLt => "<",
            LuaTokenKind::TkGt => ">",
            LuaTokenKind::TkMod => "%",
            LuaTokenKind::TkPow => "^",
            LuaTokenKind::TkLen => "#",
            LuaTokenKind::TkBitAnd => "&",
            LuaTokenKind::TkBitOr => "|",
            LuaTokenKind::TkBitXor => "~",
            LuaTokenKind::TkColon => ":",
            LuaTokenKind::TkDbColon => "::",
            LuaTokenKind::TkSemicolon => ";",
            LuaTokenKind::TkLeftBracket => "[",
            LuaTokenKind::TkRightBracket => "]",
            LuaTokenKind::TkLeftParen => "(",
            LuaTokenKind::TkRightParen => ")",
            LuaTokenKind::TkLeftBrace => "{",
            LuaTokenKind::TkRightBrace => "}",
            // Literals
            LuaTokenKind::TkInt => "<integer>",
            LuaTokenKind::TkFloat => "<number>",
            LuaTokenKind::TkName => "<name>",
            LuaTokenKind::TkString => "<string>",
            LuaTokenKind::TkLongString => "<string>",
            LuaTokenKind::TkEof => "<eof>",
            // Others
            _ => "<unknown>",
        }
    }
}

impl LuaTokenKind {
    pub fn is_keyword(self) -> bool {
        matches!(
            self,
            LuaTokenKind::TkAnd
                | LuaTokenKind::TkBreak
                | LuaTokenKind::TkDo
                | LuaTokenKind::TkElse
                | LuaTokenKind::TkElseIf
                | LuaTokenKind::TkEnd
                | LuaTokenKind::TkFalse
                | LuaTokenKind::TkFor
                | LuaTokenKind::TkFunction
                | LuaTokenKind::TkGoto
                | LuaTokenKind::TkIf
                | LuaTokenKind::TkIn
                | LuaTokenKind::TkLocal
                | LuaTokenKind::TkNil
                | LuaTokenKind::TkNot
                | LuaTokenKind::TkOr
                | LuaTokenKind::TkRepeat
                | LuaTokenKind::TkReturn
                | LuaTokenKind::TkThen
                | LuaTokenKind::TkTrue
                | LuaTokenKind::TkUntil
                | LuaTokenKind::TkWhile
        )
    }
}