erl_parse 0.0.8

Erlang source code parser
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

use erl_tokenize::tokens::{
    AtomToken, CharToken, FloatToken, IntegerToken, KeywordToken, StringToken, SymbolToken,
    VariableToken,
};
use erl_tokenize::LexicalToken;

use crate::traits::TokenRead;
use crate::{Error, ErrorKind, Parser, Result};

pub trait Parse: Sized {
    fn parse_non_left_recor<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        parser.parse()
    }
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead;
}
impl<U: Parse> Parse for Box<U> {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        parser.parse().map(Box::new)
    }
}
impl<T: Parse> Parse for Option<T> {
    fn parse<U>(parser: &mut Parser<U>) -> Result<Self>
    where
        U: TokenRead,
    {
        Ok(parser.transaction(Parser::parse).ok())
    }
}
impl Parse for AtomToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_atom_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for CharToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_char_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for FloatToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_float_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for IntegerToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_integer_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for KeywordToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_keyword_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for StringToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_string_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for SymbolToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_symbol_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}
impl Parse for VariableToken {
    fn parse<T>(parser: &mut Parser<T>) -> Result<Self>
    where
        T: TokenRead,
    {
        let token = track!(parser.parse::<LexicalToken>())?;
        let token = track!(token
            .into_variable_token()
            .map_err(ErrorKind::UnexpectedToken)
            .map_err(Error::from))?;
        Ok(token)
    }
}

pub trait ParseTail: Sized {
    type Head;
    fn parse_tail<T>(parser: &mut Parser<T>, head: Self::Head) -> Result<Self>
    where
        T: TokenRead;
}
impl<T: ParseTail> ParseTail for Box<T> {
    type Head = T::Head;
    fn parse_tail<U>(parser: &mut Parser<U>, head: Self::Head) -> Result<Self>
    where
        U: TokenRead,
    {
        T::parse_tail(parser, head).map(Box::new)
    }
}