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
use quote::{format_ident,quote_spanned, ToTokens};
use proc_macro2::{Span};
use syn::parse::{Parse, ParseStream, Result, Error};
use syn::{Ident, Token};
pub use crate::xhtml::{XhtmlClassChild,XhtmlClassAttr};
pub struct XhtmlClass {
pub open: Token![<],
pub name: String,
pub attrs: Vec<(String,XhtmlClassAttr)>,
pub children: Vec<XhtmlClassChild>,
pub close: Token![>]
}
impl XhtmlClass {
pub fn span(&self) -> Span {
self.open.span.join(self.close.span).unwrap_or(self.open.span)
}
}
impl ToTokens for XhtmlClass {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
let mut ds = proc_macro2::TokenStream::new();
let span = self.span();
let name = format_ident!("{}", self.name, span=span);
for (k,v) in self.attrs.iter() {
let k = format_ident!("{}", k, span=span);
(quote_spanned!{span=>
#k: #v,
}).to_tokens(&mut ds);
}
let mut cs = proc_macro2::TokenStream::new();
for c in self.children.iter() {
match c {
XhtmlClassChild::C(c) => {
let span = c.span();
let child_enum = format_ident!("{}Children", self.name, span=span);
let child_tag = format_ident!("{}", c.name, span=span);
(quote_spanned!{span=>
#child_enum::#child_tag(#c),
}).to_tokens(&mut cs);
},
XhtmlClassChild::D(d) => {
let span = d.span();
let child_enum = format_ident!("{}Children", self.name, span=span);
(quote_spanned!{span=>
#child_enum::Display(Box::new(#d)),
}).to_tokens(&mut cs);
}
}
}
(quote_spanned!{span=>
children: vec![#cs],
..std::default::Default::default()
}).to_tokens(&mut ds);
(quote_spanned!{span=>
#name {
#ds
}
}).to_tokens(tokens);
}
}
impl Parse for XhtmlClass {
fn parse(input: ParseStream) -> Result<Self> {
let open: Token![<] = input.parse()?;
let _ex: Token![!] = input.parse()?;
let name: Ident = input.parse()?;
let mut attrs = Vec::new();
while input.peek(Ident) {
let attr_name: Ident = input.parse()?;
let _eq: Token![=] = input.parse()?;
let attr_val = XhtmlClassAttr::parse(input, attr_name.to_string())?;
attrs.push((attr_name.to_string(), attr_val));
}
if input.peek(Token![/]) {
let _slash: Token![/] = input.parse()?;
let close: Token![>] = input.parse()?;
Ok(XhtmlClass {
open: open,
name: name.to_string(),
attrs: attrs,
children: Vec::new(),
close: close
})
} else {
let _gt: Token![>] = input.parse()?;
let mut children = Vec::new();
while !(input.peek(Token![<]) && input.peek2(Token![/])) {
let c: XhtmlClassChild = input.parse()?;
children.push(c);
}
let _lt: Token![<] = input.parse()?;
let _slash: Token![/] = input.parse()?;
let close_tag: Ident = input.parse()?;
if name.to_string() != close_tag.to_string() {
let msg = format!("Expected </{}> found </{}>", name, close_tag);
let r = Error::new(close_tag.span(), msg);
return Err(r)
}
let close: Token![>] = input.parse()?;
Ok(XhtmlClass {
open: open,
name: name.to_string(),
attrs: attrs,
children: children,
close: close
})
}
}
}