resolve: Do not put macros into module.unexpanded_invocations unless necessary

compiler/rustc_resolve/src/build_reduced_graph.rs

@@ -1155,14 +1155,18 @@ impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
         false
     }
 
-    fn visit_invoc(&mut self, id: NodeId) -> MacroRulesScopeRef<'a> {
+    fn visit_invoc(&mut self, id: NodeId) -> ExpnId {
         let invoc_id = id.placeholder_to_expn_id();
-
-        self.parent_scope.module.unexpanded_invocations.borrow_mut().insert(invoc_id);
-
         let old_parent_scope = self.r.invocation_parent_scopes.insert(invoc_id, self.parent_scope);
         assert!(old_parent_scope.is_none(), "invocation data is reset for an invocation");
+        invoc_id
+    }
 
+    /// Visit invocation in context in which it can emit a named item (possibly `macro_rules`)
+    /// directly into its parent scope's module.
+    fn visit_invoc_in_module(&mut self, id: NodeId) -> MacroRulesScopeRef<'a> {
+        let invoc_id = self.visit_invoc(id);
+        self.parent_scope.module.unexpanded_invocations.borrow_mut().insert(invoc_id);
         self.r.arenas.alloc_macro_rules_scope(MacroRulesScope::Invocation(invoc_id))
     }
 
@@ -1291,7 +1295,7 @@ impl<'a, 'b> Visitor<'b> for BuildReducedGraphVisitor<'a, 'b> {
                 return;
             }
             ItemKind::MacCall(..) => {
-                self.parent_scope.macro_rules = self.visit_invoc(item.id);
+                self.parent_scope.macro_rules = self.visit_invoc_in_module(item.id);
                 return;
             }
             ItemKind::Mod(..) => self.contains_macro_use(&item.attrs),
@@ -1309,15 +1313,15 @@ impl<'a, 'b> Visitor<'b> for BuildReducedGraphVisitor<'a, 'b> {
 
     fn visit_stmt(&mut self, stmt: &'b ast::Stmt) {
         if let ast::StmtKind::MacCall(..) = stmt.kind {
-            self.parent_scope.macro_rules = self.visit_invoc(stmt.id);
+            self.parent_scope.macro_rules = self.visit_invoc_in_module(stmt.id);
         } else {
             visit::walk_stmt(self, stmt);
         }
     }
 
     fn visit_foreign_item(&mut self, foreign_item: &'b ForeignItem) {
         if let ForeignItemKind::MacCall(_) = foreign_item.kind {
-            self.visit_invoc(foreign_item.id);
+            self.visit_invoc_in_module(foreign_item.id);
             return;
         }
 
@@ -1336,7 +1340,14 @@ impl<'a, 'b> Visitor<'b> for BuildReducedGraphVisitor<'a, 'b> {
 
     fn visit_assoc_item(&mut self, item: &'b AssocItem, ctxt: AssocCtxt) {
         if let AssocItemKind::MacCall(_) = item.kind {
-            self.visit_invoc(item.id);
+            match ctxt {
+                AssocCtxt::Trait => {
+                    self.visit_invoc_in_module(item.id);
+                }
+                AssocCtxt::Impl => {
+                    self.visit_invoc(item.id);
+                }
+            }
             return;
         }
 
@@ -1460,7 +1471,7 @@ impl<'a, 'b> Visitor<'b> for BuildReducedGraphVisitor<'a, 'b> {
     // type and value namespaces.
     fn visit_variant(&mut self, variant: &'b ast::Variant) {
         if variant.is_placeholder {
-            self.visit_invoc(variant.id);
+            self.visit_invoc_in_module(variant.id);
             return;
         }
 

src/test/ui/conditional-compilation/cfg-generic-params.stderr

@@ -17,16 +17,16 @@ LL | struct WhereBad where for<#[cfg(no)] 'a, #[cfg(yes)] T> u8: Copy;
    |                                                      ^
 
 error: cannot find attribute `unknown` in this scope
-  --> $DIR/cfg-generic-params.rs:34:43
+  --> $DIR/cfg-generic-params.rs:19:29
    |
-LL | struct WhereYes where for<#[cfg_attr(yes, unknown)] 'a> u8: Copy;
-   |                                           ^^^^^^^
+LL | fn f_lt_yes<#[cfg_attr(yes, unknown)] 'a>() {}
+   |                             ^^^^^^^
 
 error: cannot find attribute `unknown` in this scope
-  --> $DIR/cfg-generic-params.rs:30:40
+  --> $DIR/cfg-generic-params.rs:22:29
    |
-LL | type PolyYes = dyn for<#[cfg_attr(yes, unknown)] 'a> Copy;
-   |                                        ^^^^^^^
+LL | fn f_ty_yes<#[cfg_attr(yes, unknown)] T>() {}
+   |                             ^^^^^^^
 
 error: cannot find attribute `unknown` in this scope
   --> $DIR/cfg-generic-params.rs:26:34
@@ -35,16 +35,16 @@ LL | type FnYes = for<#[cfg_attr(yes, unknown)] 'a> fn();
    |                                  ^^^^^^^
 
 error: cannot find attribute `unknown` in this scope
-  --> $DIR/cfg-generic-params.rs:22:29
+  --> $DIR/cfg-generic-params.rs:30:40
    |
-LL | fn f_ty_yes<#[cfg_attr(yes, unknown)] T>() {}
-   |                             ^^^^^^^
+LL | type PolyYes = dyn for<#[cfg_attr(yes, unknown)] 'a> Copy;
+   |                                        ^^^^^^^
 
 error: cannot find attribute `unknown` in this scope
-  --> $DIR/cfg-generic-params.rs:19:29
+  --> $DIR/cfg-generic-params.rs:34:43
    |
-LL | fn f_lt_yes<#[cfg_attr(yes, unknown)] 'a>() {}
-   |                             ^^^^^^^
+LL | struct WhereYes where for<#[cfg_attr(yes, unknown)] 'a> u8: Copy;
+   |                                           ^^^^^^^
 
 error: aborting due to 8 previous errors
 

src/test/ui/feature-gates/feature-gate-custom_attribute2.stderr

@@ -1,104 +1,104 @@
-error: cannot find attribute `lt_hof` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:51:21
+error: cannot find attribute `lt_struct` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:4:15
    |
-LL |     where Q: for <#[lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
-   |                     ^^^^^^
+LL | struct StLt<#[lt_struct] 'a>(&'a u32);
+   |               ^^^^^^^^^
 
-error: cannot find attribute `ty_meth` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:46:15
+error: cannot find attribute `ty_struct` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:6:15
    |
-LL |     fn m_ty<#[ty_meth] P>(_: P) { }
-   |               ^^^^^^^
+LL | struct StTy<#[ty_struct] I>(I);
+   |               ^^^^^^^^^
 
-error: cannot find attribute `lt_meth` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:44:15
+error: cannot find attribute `lt_enum` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:9:13
    |
-LL |     fn m_lt<#[lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
-   |               ^^^^^^^
+LL | enum EnLt<#[lt_enum] 'b> { A(&'b u32), B }
+   |             ^^^^^^^
 
-error: cannot find attribute `ty_fn` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:40:11
+error: cannot find attribute `ty_enum` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:11:13
    |
-LL | fn f_ty<#[ty_fn] O>(_: O) { }
-   |           ^^^^^
+LL | enum EnTy<#[ty_enum] J> { A(J), B }
+   |             ^^^^^^^
 
-error: cannot find attribute `lt_fn` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:38:11
+error: cannot find attribute `lt_trait` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:14:14
    |
-LL | fn f_lt<#[lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
-   |           ^^^^^
+LL | trait TrLt<#[lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
+   |              ^^^^^^^^
 
-error: cannot find attribute `ty_impl_for` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:33:8
+error: cannot find attribute `ty_trait` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:16:14
    |
-LL | impl<#[ty_impl_for] N> TrTy<N> for StTy<N> {
-   |        ^^^^^^^^^^^
+LL | trait TrTy<#[ty_trait] K> { fn foo(&self, _: K); }
+   |              ^^^^^^^^
 
-error: cannot find attribute `lt_impl_for` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:29:8
+error: cannot find attribute `lt_type` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:19:13
    |
-LL | impl<#[lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
-   |        ^^^^^^^^^^^
+LL | type TyLt<#[lt_type] 'd> = &'d u32;
+   |             ^^^^^^^
 
-error: cannot find attribute `ty_inherent` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:26:8
+error: cannot find attribute `ty_type` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:21:13
    |
-LL | impl<#[ty_inherent] M> StTy<M> { }
-   |        ^^^^^^^^^^^
+LL | type TyTy<#[ty_type] L> = (L, );
+   |             ^^^^^^^
 
 error: cannot find attribute `lt_inherent` in this scope
   --> $DIR/feature-gate-custom_attribute2.rs:24:8
    |
 LL | impl<#[lt_inherent] 'e> StLt<'e> { }
    |        ^^^^^^^^^^^
 
-error: cannot find attribute `ty_type` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:21:13
+error: cannot find attribute `ty_inherent` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:26:8
    |
-LL | type TyTy<#[ty_type] L> = (L, );
-   |             ^^^^^^^
+LL | impl<#[ty_inherent] M> StTy<M> { }
+   |        ^^^^^^^^^^^
 
-error: cannot find attribute `lt_type` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:19:13
+error: cannot find attribute `lt_impl_for` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:29:8
    |
-LL | type TyLt<#[lt_type] 'd> = &'d u32;
-   |             ^^^^^^^
+LL | impl<#[lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
+   |        ^^^^^^^^^^^
 
-error: cannot find attribute `ty_trait` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:16:14
+error: cannot find attribute `ty_impl_for` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:33:8
    |
-LL | trait TrTy<#[ty_trait] K> { fn foo(&self, _: K); }
-   |              ^^^^^^^^
+LL | impl<#[ty_impl_for] N> TrTy<N> for StTy<N> {
+   |        ^^^^^^^^^^^
 
-error: cannot find attribute `lt_trait` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:14:14
+error: cannot find attribute `lt_fn` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:38:11
    |
-LL | trait TrLt<#[lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
-   |              ^^^^^^^^
+LL | fn f_lt<#[lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
+   |           ^^^^^
 
-error: cannot find attribute `ty_enum` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:11:13
+error: cannot find attribute `ty_fn` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:40:11
    |
-LL | enum EnTy<#[ty_enum] J> { A(J), B }
-   |             ^^^^^^^
+LL | fn f_ty<#[ty_fn] O>(_: O) { }
+   |           ^^^^^
 
-error: cannot find attribute `lt_enum` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:9:13
+error: cannot find attribute `lt_meth` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:44:15
    |
-LL | enum EnLt<#[lt_enum] 'b> { A(&'b u32), B }
-   |             ^^^^^^^
+LL |     fn m_lt<#[lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
+   |               ^^^^^^^
 
-error: cannot find attribute `ty_struct` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:6:15
+error: cannot find attribute `ty_meth` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:46:15
    |
-LL | struct StTy<#[ty_struct] I>(I);
-   |               ^^^^^^^^^
+LL |     fn m_ty<#[ty_meth] P>(_: P) { }
+   |               ^^^^^^^
 
-error: cannot find attribute `lt_struct` in this scope
-  --> $DIR/feature-gate-custom_attribute2.rs:4:15
+error: cannot find attribute `lt_hof` in this scope
+  --> $DIR/feature-gate-custom_attribute2.rs:51:21
    |
-LL | struct StLt<#[lt_struct] 'a>(&'a u32);
-   |               ^^^^^^^^^
+LL |     where Q: for <#[lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
+   |                     ^^^^^^
 
 error: aborting due to 17 previous errors
 

src/test/ui/issues/issue-40845.stderr

@@ -1,14 +1,14 @@
-error: cannot find macro `m` in this scope
-  --> $DIR/issue-40845.rs:4:10
-   |
-LL | impl S { m!(); }
-   |          ^
-
 error: cannot find macro `m` in this scope
   --> $DIR/issue-40845.rs:1:11
    |
 LL | trait T { m!(); }
    |           ^
 
+error: cannot find macro `m` in this scope
+  --> $DIR/issue-40845.rs:4:10
+   |
+LL | impl S { m!(); }
+   |          ^
+
 error: aborting due to 2 previous errors
 

src/test/ui/parser/default-unmatched-assoc.stderr

@@ -39,13 +39,13 @@ LL | }
    | - item list ends here
 
 error: cannot find macro `default` in this scope
-  --> $DIR/default-unmatched-assoc.rs:12:5
+  --> $DIR/default-unmatched-assoc.rs:4:5
    |
 LL |     default!();
    |     ^^^^^^^
 
 error: cannot find macro `default` in this scope
-  --> $DIR/default-unmatched-assoc.rs:4:5
+  --> $DIR/default-unmatched-assoc.rs:12:5
    |
 LL |     default!();
    |     ^^^^^^^

src/test/ui/parser/issue-65122-mac-invoc-in-mut-patterns.stderr

@@ -34,15 +34,15 @@ LL |     mac2! { does_not_exist!() }
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot find macro `does_not_exist` in this scope
-  --> $DIR/issue-65122-mac-invoc-in-mut-patterns.rs:20:13
+  --> $DIR/issue-65122-mac-invoc-in-mut-patterns.rs:22:13
    |
-LL |     mac1! { does_not_exist!() }
+LL |     mac2! { does_not_exist!() }
    |             ^^^^^^^^^^^^^^
 
 error: cannot find macro `does_not_exist` in this scope
-  --> $DIR/issue-65122-mac-invoc-in-mut-patterns.rs:22:13
+  --> $DIR/issue-65122-mac-invoc-in-mut-patterns.rs:20:13
    |
-LL |     mac2! { does_not_exist!() }
+LL |     mac1! { does_not_exist!() }
    |             ^^^^^^^^^^^^^^
 
 error: aborting due to 5 previous errors

src/test/ui/resolve/macro-determinacy-non-module.rs

@@ -0,0 +1,7 @@
+// check-pass
+
+use std as line;
+
+const C: u32 = line!();
+
+fn main() {}