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Merge #7347

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7347: Reduce TokenMap size r=edwin0cheng a=edwin0cheng

Reduces HygieneFrameQuery's memory usage by to another 10 MB.

cc #7331

bors r+

Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
This commit is contained in:
bors[bot] 2021-01-19 11:28:58 +00:00 committed by GitHub
commit 02edb4b31b
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1 changed files with 16 additions and 10 deletions
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26
crates/mbe/src/syntax_bridge.rs
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@ -16,16 +16,18 @@
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum TokenTextRange {
Token(TextRange),
Delimiter(TextRange, TextRange),
Delimiter(TextRange),
}
impl TokenTextRange {
pub fn by_kind(self, kind: SyntaxKind) -> Option<TextRange> {
match self {
TokenTextRange::Token(it) => Some(it),
TokenTextRange::Delimiter(open, close) => match kind {
T!['{'] | T!['('] | T!['['] => Some(open),
T!['}'] | T![')'] | T![']'] => Some(close),
TokenTextRange::Delimiter(it) => match kind {
T!['{'] | T!['('] | T!['['] => Some(TextRange::at(it.start(), 1.into())),
T!['}'] | T![')'] | T![']'] => {
Some(TextRange::at(it.end() - TextSize::of('}'), 1.into()))
}
_ => None,
},
}
@ -114,8 +116,10 @@ impl TokenMap {
pub fn token_by_range(&self, relative_range: TextRange) -> Option<tt::TokenId> {
let &(token_id, _) = self.entries.iter().find(|(_, range)| match range {
TokenTextRange::Token(it) => *it == relative_range,
TokenTextRange::Delimiter(open, close) => {
*open == relative_range || *close == relative_range
TokenTextRange::Delimiter(it) => {
let open = TextRange::at(it.start(), 1.into());
let close = TextRange::at(it.end() - TextSize::of('}'), 1.into());
open == relative_range || close == relative_range
}
})?;
Some(token_id)
@ -137,15 +141,17 @@ fn insert_delim(
close_relative_range: TextRange,
) -> usize {
let res = self.entries.len();
self.entries
.push((token_id, TokenTextRange::Delimiter(open_relative_range, close_relative_range)));
let cover = open_relative_range.cover(close_relative_range);
self.entries.push((token_id, TokenTextRange::Delimiter(cover)));
res
}
fn update_close_delim(&mut self, idx: usize, close_relative_range: TextRange) {
let (_, token_text_range) = &mut self.entries[idx];
if let TokenTextRange::Delimiter(dim, _) = token_text_range {
*token_text_range = TokenTextRange::Delimiter(*dim, close_relative_range);
if let TokenTextRange::Delimiter(dim) = token_text_range {
let cover = dim.cover(close_relative_range);
*token_text_range = TokenTextRange::Delimiter(cover);
}
}