diff options
Diffstat (limited to 'compiler/rustc_expand/src/config.rs')
| -rw-r--r-- | compiler/rustc_expand/src/config.rs | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/compiler/rustc_expand/src/config.rs b/compiler/rustc_expand/src/config.rs index ada49eef7b2..bcc2703c39b 100644 --- a/compiler/rustc_expand/src/config.rs +++ b/compiler/rustc_expand/src/config.rs @@ -156,6 +156,19 @@ pub fn pre_configure_attrs(sess: &Session, attrs: &[Attribute]) -> ast::AttrVec .collect() } +pub(crate) fn attr_into_trace(mut attr: Attribute, trace_name: Symbol) -> Attribute { + match &mut attr.kind { + AttrKind::Normal(normal) => { + let NormalAttr { item, tokens } = &mut **normal; + item.path.segments[0].ident.name = trace_name; + // This makes the trace attributes unobservable to token-based proc macros. + *tokens = Some(LazyAttrTokenStream::new(AttrTokenStream::default())); + } + AttrKind::DocComment(..) => unreachable!(), + } + attr +} + #[macro_export] macro_rules! configure { ($this:ident, $node:ident) => { @@ -280,16 +293,7 @@ impl<'a> StripUnconfigured<'a> { // A trace attribute left in AST in place of the original `cfg_attr` attribute. // It can later be used by lints or other diagnostics. - let mut trace_attr = cfg_attr.clone(); - match &mut trace_attr.kind { - AttrKind::Normal(normal) => { - let NormalAttr { item, tokens } = &mut **normal; - item.path.segments[0].ident.name = sym::cfg_attr_trace; - // This makes the trace attributes unobservable to token-based proc macros. - *tokens = Some(LazyAttrTokenStream::new(AttrTokenStream::default())); - } - AttrKind::DocComment(..) => unreachable!(), - } + let trace_attr = attr_into_trace(cfg_attr.clone(), sym::cfg_attr_trace); let Some((cfg_predicate, expanded_attrs)) = rustc_parse::parse_cfg_attr(cfg_attr, &self.sess.psess) |