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Shrink Nonterminal.

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By heap allocating the argument within `NtPath`, `NtVis`, and `NtStmt`.
This slightly reduces cumulative and peak allocation amounts, most
notably on `deep-vector`.
This commit is contained in:
Nicholas Nethercote
2022-04-06 12:08:39 +10:00
parent c2afaba465
commit d9592c2d9f
10 changed files with 18 additions and 16 deletions
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6
compiler/rustc_parse/src/parser/nonterminal.rs
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@@ -118,7 +118,7 @@ impl<'a> Parser<'a> {
token::NtBlock(self.collect_tokens_no_attrs(|this| this.parse_block())?)
}
NonterminalKind::Stmt => match self.parse_stmt(ForceCollect::Yes)? {
Some(s) => token::NtStmt(s),
Some(s) => token::NtStmt(P(s)),
None => {
return Err(self.struct_span_err(self.token.span, "expected a statement"));
}
@@ -161,11 +161,11 @@ impl<'a> Parser<'a> {
return Err(self.struct_span_err(self.token.span, msg));
}
NonterminalKind::Path => token::NtPath(
self.collect_tokens_no_attrs(|this| this.parse_path(PathStyle::Type))?,
P(self.collect_tokens_no_attrs(|this| this.parse_path(PathStyle::Type))?),
),
NonterminalKind::Meta => token::NtMeta(P(self.parse_attr_item(true)?)),
NonterminalKind::Vis => token::NtVis(
self.collect_tokens_no_attrs(|this| this.parse_visibility(FollowedByType::Yes))?,
P(self.collect_tokens_no_attrs(|this| this.parse_visibility(FollowedByType::Yes))?),
),
NonterminalKind::Lifetime => {
if self.check_lifetime() {