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
|
//! This module defines Concrete Syntax Tree (CST), used by rust-analyzer.
//!
//! The CST includes comments and whitespace, provides a single node type,
//! `SyntaxNode`, and a basic traversal API (parent, children, siblings).
//!
//! The *real* implementation is in the (language-agnostic) `rowan` crate, this
//! modules just wraps its API.
use ra_parser::ParseError;
use rowan::{GreenNodeBuilder, Language};
use crate::{
syntax_error::{SyntaxError, SyntaxErrorKind},
Parse, SmolStr, SyntaxKind, TextUnit,
};
pub(crate) use rowan::{GreenNode, GreenToken};
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum RustLanguage {}
impl Language for RustLanguage {
type Kind = SyntaxKind;
fn kind_from_raw(raw: rowan::cursor::SyntaxKind) -> SyntaxKind {
SyntaxKind::from(raw.0)
}
fn kind_to_raw(kind: SyntaxKind) -> rowan::cursor::SyntaxKind {
rowan::cursor::SyntaxKind(kind.into())
}
}
pub type SyntaxNode = rowan::SyntaxNode<RustLanguage>;
pub type SyntaxToken = rowan::SyntaxToken<RustLanguage>;
pub type SyntaxElement = rowan::NodeOrToken<SyntaxNode, SyntaxToken>;
pub type SyntaxNodeChildren = rowan::SyntaxNodeChildren<RustLanguage>;
pub type SyntaxElementChildren = rowan::SyntaxElementChildren<RustLanguage>;
pub use rowan::{Direction, NodeOrToken};
pub struct SyntaxTreeBuilder {
errors: Vec<SyntaxError>,
inner: GreenNodeBuilder,
}
impl Default for SyntaxTreeBuilder {
fn default() -> SyntaxTreeBuilder {
SyntaxTreeBuilder { errors: Vec::new(), inner: GreenNodeBuilder::new() }
}
}
impl SyntaxTreeBuilder {
pub(crate) fn finish_raw(self) -> (GreenNode, Vec<SyntaxError>) {
let green = self.inner.finish();
(green, self.errors)
}
pub fn finish(self) -> Parse<SyntaxNode> {
let (green, errors) = self.finish_raw();
let node = SyntaxNode::new_root(green);
if cfg!(debug_assertions) {
crate::validation::validate_block_structure(&node);
}
Parse::new(node.green().clone(), errors)
}
pub fn token(&mut self, kind: SyntaxKind, text: SmolStr) {
let kind = RustLanguage::kind_to_raw(kind);
self.inner.token(kind, text)
}
pub fn start_node(&mut self, kind: SyntaxKind) {
let kind = RustLanguage::kind_to_raw(kind);
self.inner.start_node(kind)
}
pub fn finish_node(&mut self) {
self.inner.finish_node()
}
pub fn error(&mut self, error: ParseError, text_pos: TextUnit) {
let error = SyntaxError::new(SyntaxErrorKind::ParseError(error), text_pos);
self.errors.push(error)
}
}
|
