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Rollup merge of #106849 - WaffleLapkin:unvec, r=Nilstrieb 

Allocate one less vec while parsing arrays

Probably does not matter, but imo a little bit nicer.
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Matthias Krüger 2023-01-14 18:45:28 +01:00 committed by GitHub
parent 14fbc21466 ea13023b36
commit 9db8e6d5e9
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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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@ -1475,9 +1475,8 @@ impl<'a> Parser<'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