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Avoid cloning a TtToken in SubtreeTokenSource::mk_token

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This commit is contained in:
Laurențiu Nicola 2019-08-03 21:11:58 +03:00
parent 0ca30b6c4b
commit e58baaa5a1
1 changed files with 15 additions and 9 deletions
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24
crates/ra_mbe/src/subtree_source.rs
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@ -20,8 +20,10 @@ impl<'a> SubtreeTokenSource<'a> {
// Helper function used in test
#[cfg(test)]
pub fn text(&self) -> SmolStr {
match self.get(self.curr.1) {
Some(tt) => tt.text,
let idx = self.get(self.curr.1);
let cached = self.cached.borrow();
match cached[idx] {
Some(ref tt) => tt.text.clone(),
_ => SmolStr::new(""),
}
}
@ -41,16 +43,18 @@ impl<'a> SubtreeTokenSource<'a> {
}
fn mk_token(&self, pos: usize) -> Token {
match self.get(pos) {
Some(tt) => Token { kind: tt.kind, is_jointed_to_next: tt.is_joint_to_next },
let idx = self.get(pos);
let cached = self.cached.borrow();
match cached[idx] {
Some(ref tt) => Token { kind: tt.kind, is_jointed_to_next: tt.is_joint_to_next },
None => Token { kind: EOF, is_jointed_to_next: false },
}
}
fn get(&self, pos: usize) -> Option<TtToken> {
fn get(&self, pos: usize) -> usize {
let mut cached = self.cached.borrow_mut();
if pos < cached.len() {
return cached[pos].clone();
return pos;
}
while pos >= cached.len() {
@ -78,7 +82,7 @@ impl<'a> SubtreeTokenSource<'a> {
}
}
cached[pos].clone()
pos
}
}
@ -103,8 +107,10 @@ impl<'a> TokenSource for SubtreeTokenSource<'a> {
/// Is the current token a specified keyword?
fn is_keyword(&self, kw: &str) -> bool {
match self.get(self.curr.1) {
Some(t) => t.text == *kw,
let idx = self.get(self.curr.1);
let cached = self.cached.borrow();
match cached[idx] {
Some(ref t) => t.text == *kw,
_ => false,
}
}