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Simplify `CfgEval`. 

It can contain an owned value instead of a reference.
This commit is contained in:
Nicholas Nethercote 2024-06-27 10:33:46 +10:00
parent 7d97c59438
commit 1680b791d5
1 changed files with 8 additions and 10 deletions
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18
compiler/rustc_builtin_macros/src/cfg_eval.rs
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@ -38,16 +38,14 @@ pub(crate) fn cfg_eval(
lint_node_id: NodeId,
) -> Annotatable {
let features = Some(features);
CfgEval { cfg: &mut StripUnconfigured { sess, features, config_tokens: true, lint_node_id } }
CfgEval(StripUnconfigured { sess, features, config_tokens: true, lint_node_id })
.configure_annotatable(annotatable)
// Since the item itself has already been configured by the `InvocationCollector`,
// we know that fold result vector will contain exactly one element.
.unwrap()
}
struct CfgEval<'a, 'b> {
cfg: &'a mut StripUnconfigured<'b>,
}
struct CfgEval<'a>(StripUnconfigured<'a>);
fn flat_map_annotatable(
vis: &mut impl MutVisitor,
@ -125,9 +123,9 @@ fn has_cfg_or_cfg_attr(annotatable: &Annotatable) -> bool {
res.is_break()
}
impl CfgEval<'_, '_> {
impl CfgEval<'_> {
fn configure<T: HasAttrs + HasTokens>(&mut self, node: T) -> Option<T> {
self.cfg.configure(node)
self.0.configure(node)
}
fn configure_annotatable(&mut self, mut annotatable: Annotatable) -> Option<Annotatable> {
@ -196,7 +194,7 @@ impl CfgEval<'_, '_> {
// Re-parse the tokens, setting the `capture_cfg` flag to save extra information
// to the captured `AttrTokenStream` (specifically, we capture
// `AttrTokenTree::AttributesData` for all occurrences of `#[cfg]` and `#[cfg_attr]`)
let mut parser = Parser::new(&self.cfg.sess.psess, orig_tokens, None);
let mut parser = Parser::new(&self.0.sess.psess, orig_tokens, None);
parser.capture_cfg = true;
match parse_annotatable_with(&mut parser) {
Ok(a) => annotatable = a,
@ -212,16 +210,16 @@ impl CfgEval<'_, '_> {
}
}
impl MutVisitor for CfgEval<'_, '_> {
impl MutVisitor for CfgEval<'_> {
#[instrument(level = "trace", skip(self))]
fn visit_expr(&mut self, expr: &mut P<ast::Expr>) {
self.cfg.configure_expr(expr, false);
self.0.configure_expr(expr, false);
mut_visit::noop_visit_expr(expr, self);
}
#[instrument(level = "trace", skip(self))]
fn visit_method_receiver_expr(&mut self, expr: &mut P<ast::Expr>) {
self.cfg.configure_expr(expr, true);
self.0.configure_expr(expr, true);
mut_visit::noop_visit_expr(expr, self);
}