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
|
mod generated;
use itertools::Itertools;
use smol_str::SmolStr;
use {
SyntaxNode, SyntaxNodeRef, TreeRoot, SyntaxError,
SyntaxKind::*,
};
pub use self::generated::*;
pub trait AstNode<'a>: Clone + Copy {
fn cast(syntax: SyntaxNodeRef<'a>) -> Option<Self>
where Self: Sized;
fn syntax(self) -> SyntaxNodeRef<'a>;
}
pub trait NameOwner<'a>: AstNode<'a> {
fn name(self) -> Option<Name<'a>> {
self.syntax()
.children()
.filter_map(Name::cast)
.next()
}
}
pub trait AttrsOwner<'a>: AstNode<'a> {
fn attrs(&self) -> Box<Iterator<Item=Attr<'a>> + 'a> {
let it = self.syntax().children()
.filter_map(Attr::cast);
Box::new(it)
}
}
#[derive(Clone, Debug)]
pub struct ParsedFile {
root: SyntaxNode
}
impl ParsedFile {
pub fn parse(text: &str) -> Self {
let root = ::parse(text);
ParsedFile { root }
}
pub fn ast(&self) -> File {
File::cast(self.syntax()).unwrap()
}
pub fn syntax(&self) -> SyntaxNodeRef {
self.root.borrowed()
}
pub fn errors(&self) -> Vec<SyntaxError> {
self.syntax().root.syntax_root().errors.clone()
}
}
impl<'a> FnDef<'a> {
pub fn has_atom_attr(&self, atom: &str) -> bool {
self.attrs()
.filter_map(|x| x.as_atom())
.any(|x| x == atom)
}
}
impl<'a> Attr<'a> {
pub fn as_atom(&self) -> Option<SmolStr> {
let tt = self.value()?;
let (_bra, attr, _ket) = tt.syntax().children().collect_tuple()?;
if attr.kind() == IDENT {
Some(attr.leaf_text().unwrap())
} else {
None
}
}
pub fn as_call(&self) -> Option<(SmolStr, TokenTree<'a>)> {
let tt = self.value()?;
let (_bra, attr, args, _ket) = tt.syntax().children().collect_tuple()?;
let args = TokenTree::cast(args)?;
if attr.kind() == IDENT {
Some((attr.leaf_text().unwrap(), args))
} else {
None
}
}
}
impl<'a> Name<'a> {
pub fn text(&self) -> SmolStr {
let ident = self.syntax().first_child()
.unwrap();
ident.leaf_text().unwrap()
}
}
impl<'a> NameRef<'a> {
pub fn text(&self) -> SmolStr {
let ident = self.syntax().first_child()
.unwrap();
ident.leaf_text().unwrap()
}
}
impl<'a> ImplItem<'a> {
pub fn target_type(&self) -> Option<TypeRef<'a>> {
match self.target() {
(Some(t), None) | (_, Some(t)) => Some(t),
_ => None,
}
}
pub fn target_trait(&self) -> Option<TypeRef<'a>> {
match self.target() {
(Some(t), Some(_)) => Some(t),
_ => None,
}
}
fn target(&self) -> (Option<TypeRef<'a>>, Option<TypeRef<'a>>) {
let mut types = self.syntax().children().filter_map(TypeRef::cast);
let first = types.next();
let second = types.next();
(first, second)
}
}
impl<'a> Module<'a> {
pub fn has_semi(&self) -> bool {
match self.syntax().last_child() {
None => false,
Some(node) => node.kind() == SEMI,
}
}
}
|
