protospec-build 0.3.0

One binary format language to rule them all, One binary format language to find them, One binary format language to bring them all and in the darkness bind them.
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

use super::*;

pub struct TokenIter {
    inner: Vec<SpannedToken>,
}

impl Iterator for TokenIter {
    type Item = SpannedToken;

    fn next(&mut self) -> Option<SpannedToken> {
        self.inner.pop()
    }
}

impl TokenIter {
    pub fn new(mut tokens: Vec<SpannedToken>) -> Self {
        tokens.reverse();
        TokenIter { inner: tokens }
    }

    pub fn peek(&self) -> ParseResult<&Token> {
        self.inner
            .last()
            .map(|x| &x.token)
            .ok_or(ParseError::UnexpectedEOF)
    }

    pub fn peek_token(&self, token: Token) -> ParseResult<bool> {
        self.inner
            .last()
            .map(|x| &x.token == &token)
            .ok_or(ParseError::UnexpectedEOF)
    }

    pub fn peek_span(&self) -> ParseResult<Span> {
        self.inner
            .last()
            .map(|x| x.span)
            .ok_or(ParseError::UnexpectedEOF)
    }

    pub fn has_next(&self) -> bool {
        self.inner.len() > 0
    }

    pub fn eat(&mut self, token: Token) -> Option<SpannedToken> {
        if let Some(SpannedToken { token: inner, .. }) = self.inner.last() {
            if &token == inner {
                return self.inner.pop();
            }
        }
        None
    }

    pub fn eat_any(&mut self, token: &[Token]) -> Option<SpannedToken> {
        if let Some(SpannedToken { token: inner, .. }) = self.inner.last() {
            if token.iter().any(|x| x == inner) {
                return self.inner.pop();
            }
        }
        None
    }

    pub fn expect(&mut self, token: Token) -> ParseResult<Span> {
        if let Some(SpannedToken { token: inner, span }) = self.inner.last() {
            if &token == inner {
                return Ok(self.inner.pop().unwrap().span);
            } else {
                return Err(ParseError::Unexpected(
                    SpannedToken {
                        token: inner.clone(),
                        span: *span,
                    },
                    token.to_string().trim().to_string(),
                ));
            }
        } else {
            Err(ParseError::UnexpectedEOF)
        }
    }

    pub fn expect_oneof(&mut self, token: &[Token]) -> ParseResult<SpannedToken> {
        if let Some(SpannedToken { token: inner, span }) = self.inner.last() {
            if token.iter().any(|x| x == inner) {
                return Ok(self.inner.pop().unwrap());
            } else {
                return Err(ParseError::Unexpected(
                    SpannedToken {
                        token: inner.clone(),
                        span: *span,
                    },
                    token
                        .iter()
                        .map(|x| format!("'{}'", x.to_string().trim()))
                        .collect::<Vec<_>>()
                        .join(", "),
                ));
            }
        } else {
            Err(ParseError::UnexpectedEOF)
        }
    }

    pub fn expect_ident(&mut self) -> ParseResult<Ident> {
        if let Some(SpannedToken { token: inner, span }) = self.inner.last() {
            if let Token::Ident(_) = inner {
                let token = self.inner.pop().unwrap();
                if let SpannedToken {
                    token: Token::Ident(name),
                    span,
                } = token
                {
                    Ok(Ident { name, span })
                } else {
                    unimplemented!()
                }
            } else {
                return Err(ParseError::Unexpected(
                    SpannedToken {
                        token: inner.clone(),
                        span: *span,
                    },
                    "ident".to_string(),
                ));
            }
        } else {
            Err(ParseError::UnexpectedEOF)
        }
    }

    pub fn expect_string(&mut self) -> ParseResult<Str> {
        if let Some(SpannedToken { token: inner, span }) = self.inner.last() {
            if let Token::String(_) = inner {
                let token = self.inner.pop().unwrap();
                if let SpannedToken {
                    token: Token::String(content),
                    span,
                } = token
                {
                    Ok(Str { content, span })
                } else {
                    unimplemented!()
                }
            } else {
                return Err(ParseError::Unexpected(
                    SpannedToken {
                        token: inner.clone(),
                        span: *span,
                    },
                    "string".to_string(),
                ));
            }
        } else {
            Err(ParseError::UnexpectedEOF)
        }
    }

    pub fn expect_any(&mut self) -> ParseResult<SpannedToken> {
        if let Some(x) = self.inner.pop() {
            Ok(x)
        } else {
            Err(ParseError::UnexpectedEOF)
        }
    }
}