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

// This is free and unencumbered software released into the public domain.

use super::lexer::*;
use crate::{
    prelude::{vec, String, Vec},
    ParsedAttribute, ParsedBlock, ParsedImport, ParsedMember, ParsedModel, ParsedPackage,
    ParsedPort, Span, SyntaxResult,
};
use nom::{
    branch::alt,
    bytes::complete::{tag, take_while},
    character::complete::{char, multispace0, multispace1},
    combinator::{map, opt},
    error::context,
    multi::many0,
    sequence::{delimited, preceded, terminated},
};
use sysml_model::QualifiedName;

pub fn model<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, ParsedModel)> {
    let (input, package) =
        context("model", delimited(multispace0, package, multispace0))(input.into())?;

    Ok((
        input,
        ParsedModel {
            members: vec![ParsedMember::Package(package)],
        },
    ))
}

pub fn members<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, Vec<ParsedMember>)> {
    let (input, members) = context(
        "tokens",
        many0(alt((
            terminated(map(import, ParsedMember::Import), multispace0),
            terminated(map(package, ParsedMember::Package), multispace0),
            terminated(map(block_usage, ParsedMember::BlockUsage), multispace0),
            terminated(
                map(attribute_usage, ParsedMember::AttributeUsage),
                multispace0,
            ),
            terminated(map(port_usage, ParsedMember::PortUsage), multispace0),
        ))),
    )(input.into())?;

    Ok((input, members))
}

pub fn import<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, ParsedImport)> {
    use nom::AsChar;
    let (input, _) = tag("import")(input.into())?;
    let (input, _) = multispace1(input)?;
    let (input, name) = map(take_while(|c| AsChar::as_char(c) != ';'), |span: Span| {
        QualifiedName::from(span.into_fragment())
    })(input)?;
    let (input, _) = char(';')(input)?;

    Ok((input, ParsedImport::new(name)))
}

pub fn package<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, ParsedPackage)> {
    let (input, (name, short_name, _, members)) = element(input.into(), "package")?;

    Ok((
        input,
        ParsedPackage {
            name: name.map(String::from),
            short_name: short_name.map(String::from),
            members,
        },
    ))
}

pub fn block_usage<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, ParsedBlock)> {
    let (input, (name, short_name, definition, members)) = element(input.into(), "block")?;

    Ok((
        input,
        ParsedBlock {
            name,
            short_name,
            definition,
            members,
        },
    ))
}

pub fn attribute_usage<'a>(
    input: impl Into<Span<'a>>,
) -> SyntaxResult<'a, (Span<'a>, ParsedAttribute)> {
    let (input, (name, short_name, definition, members)) = element(input.into(), "attribute")?;

    Ok((
        input,
        ParsedAttribute {
            name,
            short_name,
            definition,
            members,
        },
    ))
}

pub fn port_usage<'a>(input: impl Into<Span<'a>>) -> SyntaxResult<'a, (Span<'a>, ParsedPort)> {
    let (input, (name, short_name, definition, members)) = element(input.into(), "port")?;

    Ok((
        input,
        ParsedPort {
            name,
            short_name,
            definition,
            members,
        },
    ))
}

pub fn element<'a>(
    input: impl Into<Span<'a>>,
    tag_name: &'static str,
) -> SyntaxResult<
    'a,
    (
        Span<'a>,
        (
            Option<String>,
            Option<String>,
            Option<QualifiedName>,
            Vec<ParsedMember>,
        ),
    ),
> {
    let (input, _) = context(tag_name, tag(tag_name))(input.into())?;
    let (input, _) = multispace1(input)?;
    let (input, (name, short_name)) = identification(input)?;
    let (input, _) = multispace0(input)?;
    let (input, definition) = opt(delimited(
        terminated(char(':'), multispace0),
        qualified_name,
        multispace0,
    ))(input)?;
    let (input, members) = alt((
        map(char(';'), |_| Vec::new()),
        delimited(
            char('{'),
            preceded(multispace0, members),
            preceded(multispace0, char('}')),
        ),
    ))(input)?;

    Ok((input, (name, short_name, definition, members)))
}

pub fn identification<'a>(
    input: impl Into<Span<'a>>,
) -> SyntaxResult<'a, (Span<'a>, (Option<String>, Option<String>))> {
    let (input, short_name) = opt(delimited(char('<'), name, char('>')))(input.into())?;
    let (input, _) = multispace0(input)?;
    let (input, name) = opt(name)(input)?;

    Ok((input, (name, short_name)))
}

#[cfg(test)]
mod tests {}