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
|
use ra_syntax::SmolStr;
use crate::macros::tt;
#[derive(Debug)]
pub(crate) struct MacroRules {
rules: Vec<Rule>,
}
#[derive(Debug)]
struct Rule {
lhs: TokenTree,
rhs: TokenTree,
}
#[derive(Debug)]
enum TokenTree {
Leaf(Leaf),
Subtree(Subtree),
Repeat(Repeat),
}
#[derive(Debug)]
enum Leaf {
Literal(Literal),
Punct(Punct),
Ident(Ident),
Var(Var),
}
#[derive(Debug)]
struct Subtree {
delimiter: Delimiter,
token_trees: Vec<TokenTree>,
}
#[derive(Debug)]
enum Delimiter {
Parenthesis,
Brace,
Bracket,
None,
}
#[derive(Debug)]
struct Repeat {
subtree: Subtree,
kind: RepeatKind,
}
#[derive(Debug)]
enum RepeatKind {
ZeroOrMore,
OneOrMore,
ZeroOrOne,
}
#[derive(Debug)]
struct Literal {
text: SmolStr,
}
#[derive(Debug)]
struct Punct {
char: char,
}
#[derive(Debug)]
struct Ident {
text: SmolStr,
}
#[derive(Debug)]
struct Var {
text: SmolStr,
}
pub(crate) fn parse(tt: &tt::Subtree) -> MacroRules {
MacroRules { rules: Vec::new() }
}
|
