Factor out StmtKind::MacCall fields into `MacCallStmt` struct

In PR #76130, I add a fourth field, which makes using a tuple variant
somewhat unwieldy.

4 files changed, 19 insertions, 13 deletions

diff --git a/compiler/rustc_ast/src/ast.rs b/compiler/rustc_ast/src/ast.rs
index 127a53cad2b..49aa1fc1735 100644
--- a/compiler/rustc_ast/src/ast.rs
+++ b/compiler/rustc_ast/src/ast.rs
@@ -922,9 +922,13 @@ impl Stmt {
     pub fn add_trailing_semicolon(mut self) -> Self {
         self.kind = match self.kind {
             StmtKind::Expr(expr) => StmtKind::Semi(expr),
-            StmtKind::MacCall(mac) => StmtKind::MacCall(
-                mac.map(|(mac, _style, attrs)| (mac, MacStmtStyle::Semicolon, attrs)),
-            ),
+            StmtKind::MacCall(mac) => {
+                StmtKind::MacCall(mac.map(|MacCallStmt { mac, style: _, attrs }| MacCallStmt {
+                    mac,
+                    style: MacStmtStyle::Semicolon,
+                    attrs,
+                }))
+            }
             kind => kind,
         };
         self
@@ -958,7 +962,14 @@ pub enum StmtKind {
     /// Just a trailing semi-colon.
     Empty,
     /// Macro.
-    MacCall(P<(MacCall, MacStmtStyle, AttrVec)>),
+    MacCall(P<MacCallStmt>),
+}
+
+#[derive(Clone, Encodable, Decodable, Debug)]
+pub struct MacCallStmt {
+    pub mac: MacCall,
+    pub style: MacStmtStyle,
+    pub attrs: AttrVec,
 }
 
 #[derive(Clone, Copy, PartialEq, Encodable, Decodable, Debug)]
diff --git a/compiler/rustc_ast/src/attr/mod.rs b/compiler/rustc_ast/src/attr/mod.rs
index edcbce3e2cf..12d6f7cc33d 100644
--- a/compiler/rustc_ast/src/attr/mod.rs
+++ b/compiler/rustc_ast/src/attr/mod.rs
@@ -16,7 +16,6 @@ use rustc_span::symbol::{sym, Ident, Symbol};
 use rustc_span::Span;
 
 use std::iter;
-use std::ops::DerefMut;
 
 pub struct MarkedAttrs(GrowableBitSet<AttrId>);
 
@@ -634,10 +633,7 @@ impl HasAttrs for StmtKind {
             StmtKind::Local(ref local) => local.attrs(),
             StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => expr.attrs(),
             StmtKind::Empty | StmtKind::Item(..) => &[],
-            StmtKind::MacCall(ref mac) => {
-                let (_, _, ref attrs) = **mac;
-                attrs.attrs()
-            }
+            StmtKind::MacCall(ref mac) => mac.attrs.attrs(),
         }
     }
 
@@ -647,8 +643,7 @@ impl HasAttrs for StmtKind {
             StmtKind::Expr(expr) | StmtKind::Semi(expr) => expr.visit_attrs(f),
             StmtKind::Empty | StmtKind::Item(..) => {}
             StmtKind::MacCall(mac) => {
-                let (_mac, _style, attrs) = mac.deref_mut();
-                attrs.visit_attrs(f);
+                mac.attrs.visit_attrs(f);
             }
         }
     }
diff --git a/compiler/rustc_ast/src/mut_visit.rs b/compiler/rustc_ast/src/mut_visit.rs
index 965571aaa54..3ef83ef3fc9 100644
--- a/compiler/rustc_ast/src/mut_visit.rs
+++ b/compiler/rustc_ast/src/mut_visit.rs
@@ -1305,7 +1305,7 @@ pub fn noop_flat_map_stmt_kind<T: MutVisitor>(
         StmtKind::Semi(expr) => vis.filter_map_expr(expr).into_iter().map(StmtKind::Semi).collect(),
         StmtKind::Empty => smallvec![StmtKind::Empty],
         StmtKind::MacCall(mut mac) => {
-            let (mac_, _semi, attrs) = mac.deref_mut();
+            let MacCallStmt { mac: mac_, style: _, attrs } = mac.deref_mut();
             vis.visit_mac(mac_);
             visit_thin_attrs(attrs, vis);
             smallvec![StmtKind::MacCall(mac)]
diff --git a/compiler/rustc_ast/src/visit.rs b/compiler/rustc_ast/src/visit.rs
index b65a88cb90e..234ce280f97 100644
--- a/compiler/rustc_ast/src/visit.rs
+++ b/compiler/rustc_ast/src/visit.rs
@@ -692,7 +692,7 @@ pub fn walk_stmt<'a, V: Visitor<'a>>(visitor: &mut V, statement: &'a Stmt) {
         StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => visitor.visit_expr(expr),
         StmtKind::Empty => {}
         StmtKind::MacCall(ref mac) => {
-            let (ref mac, _, ref attrs) = **mac;
+            let MacCallStmt { ref mac, style: _, ref attrs } = **mac;
             visitor.visit_mac(mac);
             for attr in attrs.iter() {
                 visitor.visit_attribute(attr);