diff options
Diffstat (limited to 'compiler/rustc_resolve/src/macros.rs')
| -rw-r--r-- | compiler/rustc_resolve/src/macros.rs | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/compiler/rustc_resolve/src/macros.rs b/compiler/rustc_resolve/src/macros.rs index 77ef7f56c09..333fc808d1b 100644 --- a/compiler/rustc_resolve/src/macros.rs +++ b/compiler/rustc_resolve/src/macros.rs @@ -1,6 +1,7 @@ //! A bunch of methods and structures more or less related to resolving macros and //! interface provided by `Resolver` to macro expander. +use std::any::Any; use std::cell::Cell; use std::mem; use std::sync::Arc; @@ -13,10 +14,10 @@ use rustc_expand::base::{ Annotatable, DeriveResolution, Indeterminate, ResolverExpand, SyntaxExtension, SyntaxExtensionKind, }; -use rustc_expand::compile_declarative_macro; use rustc_expand::expand::{ AstFragment, AstFragmentKind, Invocation, InvocationKind, SupportsMacroExpansion, }; +use rustc_expand::{MacroRulesMacroExpander, compile_declarative_macro}; use rustc_hir::def::{self, DefKind, Namespace, NonMacroAttrKind}; use rustc_hir::def_id::{CrateNum, DefId, LocalDefId}; use rustc_middle::middle::stability; @@ -357,8 +358,12 @@ impl<'ra, 'tcx> ResolverExpand for Resolver<'ra, 'tcx> { let SyntaxExtensionKind::LegacyBang(ref ext) = m.ext.kind else { continue; }; + let ext: &dyn Any = ext.as_ref(); + let Some(m) = ext.downcast_ref::<MacroRulesMacroExpander>() else { + continue; + }; for arm_i in unused_arms.iter() { - if let Some((ident, rule_span)) = ext.get_unused_rule(arm_i) { + if let Some((ident, rule_span)) = m.get_unused_rule(arm_i) { self.lint_buffer.buffer_lint( UNUSED_MACRO_RULES, node_id, |