tiny-rsx 0.3.0

A fast and minimal syn RSX (JSX in Rust) 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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175

use quote::ToTokens;
use syn::{punctuated::Punctuated, Expr, Ident, LitStr, Token};

pub(crate) mod kw {
    use syn::custom_keyword;

    custom_keyword!(DOCTYPE);
    custom_keyword!(html);
}

/// An identifier seperated by dashes: `foo-bar-baz`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct DashIdent(pub Punctuated<Ident, Token![-]>);

/// An HTML doctype declaration: <!DOCTYPE html>.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Doctype {
    pub lt_sign: Token![<],
    pub excl_mark: Token![!],
    pub doctype: kw::DOCTYPE,
    pub html: kw::html,
    pub gt_sign: Token![>],
}

/// A value, either a string literal or a braced expression.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Value {
    /// A string literal: `"foo bar"`.
    LitStr(LitStr),
    /// A braced expression: `{1 + 2}`.
    Expr(Expr),
}

/// An HTML attribute consisting of a key and a value: `foo="bar"`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Attr {
    pub key: DashIdent,
    pub eq_sign: Token![=],
    pub value: Value,
}

/// An HTML opening or closing tag: `<foo>`, `</foo>`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Tag {
    Opening {
        lt_sign: Token![<],
        name: DashIdent,
        attrs: Vec<Attr>,
        void_slash: Option<Token![/]>,
        gt_sign: Token![>],
    },
    Closing {
        lt_sign: Token![<],
        name: DashIdent,
        gt_sign: Token![>],
    },
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Node {
    Doctype(Doctype),
    Tag(Tag),
    Value(Value),
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct NodeTree {
    pub nodes: Box<[Node]>,
}

impl Tag {
    pub fn is_opening_tag(&self) -> bool {
        matches!(self, Self::Opening { .. })
    }

    pub fn is_closing_tag(&self) -> bool {
        matches!(self, Self::Closing { .. })
    }

    pub fn is_self_closing(&self) -> bool {
        matches!(
            self,
            Self::Opening {
                void_slash: Some(_),
                ..
            }
        )
    }
}

impl ToTokens for DashIdent {
    #[inline]
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        self.0.to_tokens(tokens)
    }
}

impl ToTokens for Doctype {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        self.lt_sign.to_tokens(tokens);
        self.excl_mark.to_tokens(tokens);
        self.doctype.to_tokens(tokens);
        self.html.to_tokens(tokens);
        self.gt_sign.to_tokens(tokens);
    }
}

impl ToTokens for Value {
    #[inline]
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        match self {
            Value::LitStr(lit_str) => lit_str.to_tokens(tokens),
            Value::Expr(expr) => expr.to_tokens(tokens),
        }
    }
}

impl ToTokens for Attr {
    #[inline]
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        self.key.to_tokens(tokens);
        self.value.to_tokens(tokens);
    }
}

impl ToTokens for Tag {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        match self {
            Tag::Opening {
                lt_sign,
                name,
                attrs,
                void_slash,
                gt_sign,
            } => {
                lt_sign.to_tokens(tokens);
                name.to_tokens(tokens);
                for attr in attrs {
                    attr.to_tokens(tokens);
                }
                void_slash.to_tokens(tokens);
                gt_sign.to_tokens(tokens);
            }
            Tag::Closing {
                lt_sign,
                name,
                gt_sign,
            } => {
                lt_sign.to_tokens(tokens);
                name.to_tokens(tokens);
                gt_sign.to_tokens(tokens);
            }
        }
    }
}

impl ToTokens for Node {
    #[inline]
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        match self {
            Node::Doctype(doctype) => doctype.to_tokens(tokens),
            Node::Tag(tag) => tag.to_tokens(tokens),
            Node::Value(value) => value.to_tokens(tokens),
        }
    }
}

impl ToTokens for NodeTree {
    #[inline]
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        for node in &self.nodes {
            node.to_tokens(tokens);
        }
    }
}