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Rollup merge of #139653 - nnethercote:fix-139495, r=petrochenkov

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Handle a negated literal in `eat_token_lit`.

Fixes #139495.

r? `@petrochenkov`
This commit is contained in:
Jacob Pratt 2025-04-11 21:21:01 +02:00 • committed by GitHub
commit 2f873f96e2
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3 changed files with 29 additions and 4 deletions
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13
compiler/rustc_parse/src/parser/expr.rs
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@ -2166,10 +2166,15 @@ impl<'a> Parser<'a> {
let expr = self
.eat_metavar_seq(mv_kind, |this| this.parse_expr())
.expect("metavar seq expr");
let ast::ExprKind::Lit(token_lit) = expr.kind else {
panic!("didn't reparse an expr");
};
Some(token_lit)
if let ast::ExprKind::Lit(token_lit) = expr.kind {
Some(token_lit)
} else if let ast::ExprKind::Unary(UnOp::Neg, inner) = &expr.kind
&& let ast::Expr { kind: ast::ExprKind::Lit(_), .. } = **inner
{
None
} else {
panic!("unexpected reparsed expr: {:?}", expr.kind);
}
}
_ => None,
}