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
|
use {SyntaxKind};
use syntax_kinds::*;
use lexer::ptr::Ptr;
pub(crate) fn is_string_literal_start(c: char, c1: Option<char>, c2: Option<char>) -> bool {
match (c, c1, c2) {
('r', Some('"'), _) |
('r', Some('#'), _) |
('b', Some('"'), _) |
('b', Some('\''), _) |
('b', Some('r'), Some('"')) |
('b', Some('r'), Some('#')) => true,
_ => false
}
}
pub(crate) fn scan_char(ptr: &mut Ptr) {
if ptr.bump().is_none() {
return; // TODO: error reporting is upper in the stack
}
scan_char_or_byte(ptr);
if !ptr.next_is('\'') {
return; // TODO: error reporting
}
ptr.bump();
}
pub(crate) fn scan_byte_char_or_string(ptr: &mut Ptr) -> SyntaxKind {
// unwrapping and not-exhaustive match are ok
// because of string_literal_start
let c = ptr.bump().unwrap();
match c {
'\'' => {
scan_byte(ptr);
BYTE
}
'"' => {
scan_byte_string(ptr);
BYTE_STRING
}
'r' => {
scan_raw_byte_string(ptr);
RAW_BYTE_STRING
}
_ => unreachable!(),
}
}
pub(crate) fn scan_string(ptr: &mut Ptr) {
while let Some(c) = ptr.bump() {
if c == '"' {
return
}
}
}
pub(crate) fn scan_raw_string(ptr: &mut Ptr) {
if !ptr.next_is('"') {
return
}
ptr.bump();
while let Some(c) = ptr.bump() {
if c == '"' {
return
}
}
}
fn scan_byte(ptr: &mut Ptr) {
if ptr.next_is('\'') {
ptr.bump();
return
}
ptr.bump();
if ptr.next_is('\'') {
ptr.bump();
return
}
}
fn scan_byte_string(ptr: &mut Ptr) {
while let Some(c) = ptr.bump() {
if c == '"' {
return
}
}
}
fn scan_raw_byte_string(ptr: &mut Ptr) {
if !ptr.next_is('"') {
return
}
ptr.bump();
while let Some(c) = ptr.bump() {
if c == '"' {
return
}
}
}
fn scan_char_or_byte(ptr: &mut Ptr) {
//FIXME: deal with escape sequencies
ptr.bump();
}
|
