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Fix highlighting of byte escape sequences

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Currently non-UTF8 escape sequences in byte strings and any escape
sequences in byte literals are ignored.
This commit is contained in:
oxalica 2023-07-17 22:28:57 +08:00
parent 37f84c101b
commit de1f766820
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GPG key ID: D425CB23CADE82D9
5 changed files with 48 additions and 10 deletions
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14
crates/syntax/src/ast/token_ext.rs
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@ -146,6 +146,7 @@ impl QuoteOffsets {
pub trait IsString: AstToken {
const RAW_PREFIX: &'static str;
const MODE: Mode;
fn is_raw(&self) -> bool {
self.text().starts_with(Self::RAW_PREFIX)
}
@ -181,7 +182,7 @@ pub trait IsString: AstToken {
let text = &self.text()[text_range_no_quotes - start];
let offset = text_range_no_quotes.start() - start;
unescape_literal(text, Mode::Str, &mut |range, unescaped_char| {
unescape_literal(text, Self::MODE, &mut |range, unescaped_char| {
let text_range =
TextRange::new(range.start.try_into().unwrap(), range.end.try_into().unwrap());
cb(text_range + offset, unescaped_char);
@ -196,6 +197,7 @@ pub trait IsString: AstToken {
impl IsString for ast::String {
const RAW_PREFIX: &'static str = "r";
const MODE: Mode = Mode::Str;
}
impl ast::String {
@ -213,7 +215,7 @@ impl ast::String {
let mut buf = String::new();
let mut prev_end = 0;
let mut has_error = false;
unescape_literal(text, Mode::Str, &mut |char_range, unescaped_char| match (
unescape_literal(text, Self::MODE, &mut |char_range, unescaped_char| match (
unescaped_char,
buf.capacity() == 0,
) {
@ -239,6 +241,7 @@ impl ast::String {
impl IsString for ast::ByteString {
const RAW_PREFIX: &'static str = "br";
const MODE: Mode = Mode::ByteStr;
}
impl ast::ByteString {
@ -256,7 +259,7 @@ impl ast::ByteString {
let mut buf: Vec<u8> = Vec::new();
let mut prev_end = 0;
let mut has_error = false;
unescape_literal(text, Mode::ByteStr, &mut |char_range, unescaped_char| match (
unescape_literal(text, Self::MODE, &mut |char_range, unescaped_char| match (
unescaped_char,
buf.capacity() == 0,
) {
@ -282,6 +285,9 @@ impl ast::ByteString {
impl IsString for ast::CString {
const RAW_PREFIX: &'static str = "cr";
// XXX: `Mode::CStr` is not supported by `unescape_literal` of ra-ap-rustc_lexer yet.
// Here we pretend it to be a byte string.
const MODE: Mode = Mode::ByteStr;
}
impl ast::CString {
@ -299,7 +305,7 @@ impl ast::CString {
let mut buf = String::new();
let mut prev_end = 0;
let mut has_error = false;
unescape_literal(text, Mode::Str, &mut |char_range, unescaped_char| match (
unescape_literal(text, Self::MODE, &mut |char_range, unescaped_char| match (
unescaped_char,
buf.capacity() == 0,
) {