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Allocate one less vec in parser/expr.rs

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Maybe Waffle 2023-01-14 11:44:25 +00:00
parent 5ca6f7d2c3
commit ea13023b36
1 changed files with 2 additions and 3 deletions
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5
compiler/rustc_parse/src/parser/expr.rs
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@ -1471,9 +1471,8 @@ fn parse_array_or_repeat_expr(&mut self, close_delim: Delimiter) -> PResult<'a,
} else if self.eat(&token::Comma) {
// Vector with two or more elements.
let sep = SeqSep::trailing_allowed(token::Comma);
let (remaining_exprs, _) = self.parse_seq_to_end(close, sep, |p| p.parse_expr())?;
let mut exprs = vec![first_expr];
exprs.extend(remaining_exprs);
let (mut exprs, _) = self.parse_seq_to_end(close, sep, |p| p.parse_expr())?;
exprs.insert(0, first_expr);
ExprKind::Array(exprs)
} else {
// Vector with one element