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
|
//! An experimental implementation of [Rust RFC#2256 libsyntax2.0][rfc#2256].
//!
//! The intent is to be an IDE-ready parser, i.e. one that offers
//!
//! - easy and fast incremental re-parsing,
//! - graceful handling of errors, and
//! - maintains all information in the source file.
//!
//! For more information, see [the RFC][rfc#2265], or [the working draft][RFC.md].
//!
//! [rfc#2256]: <https://github.com/rust-lang/rfcs/pull/2256>
//! [RFC.md]: <https://github.com/matklad/libsyntax2/blob/master/docs/RFC.md>
#![forbid(
missing_debug_implementations,
unconditional_recursion,
future_incompatible
)]
#![deny(bad_style, missing_docs)]
#![allow(missing_docs)]
//#![warn(unreachable_pub)] // rust-lang/rust#47816
extern crate itertools;
extern crate unicode_xid;
extern crate drop_bomb;
extern crate parking_lot;
extern crate smol_str;
extern crate text_unit;
pub mod algo;
pub mod ast;
mod lexer;
#[macro_use]
mod parser_api;
mod grammar;
mod parser_impl;
mod syntax_kinds;
mod yellow;
/// Utilities for simple uses of the parser.
pub mod utils;
pub mod text_utils;
pub use {
text_unit::{TextRange, TextUnit},
smol_str::SmolStr,
ast::AstNode,
lexer::{tokenize, Token},
syntax_kinds::SyntaxKind,
yellow::{SyntaxNode, SyntaxNodeRef, OwnedRoot, RefRoot, TreeRoot, SyntaxError},
};
#[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) -> ast::File {
ast::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()
}
}
pub fn parse(text: &str) -> SyntaxNode {
let tokens = tokenize(&text);
let res = parser_impl::parse::<yellow::GreenBuilder>(text, &tokens);
validate_block_structure(res.borrowed());
res
}
#[cfg(not(debug_assertions))]
fn validate_block_structure(_: SyntaxNodeRef) {}
#[cfg(debug_assertions)]
fn validate_block_structure(root: SyntaxNodeRef) {
let mut stack = Vec::new();
for node in algo::walk::preorder(root) {
match node.kind() {
SyntaxKind::L_CURLY => {
stack.push(node)
}
SyntaxKind::R_CURLY => {
if let Some(pair) = stack.pop() {
assert_eq!(
node.parent(),
pair.parent(),
"unpaired curleys:\n{}",
utils::dump_tree(root),
);
assert!(
node.next_sibling().is_none() && pair.prev_sibling().is_none(),
"floating curlys at {:?}\nfile:\n{}\nerror:\n{}\n",
node,
root.text(),
node.text(),
);
}
}
_ => (),
}
}
}
|
