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

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

8 files changed, 32 insertions, 23 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);
diff --git a/compiler/rustc_ast_pretty/src/pprust.rs b/compiler/rustc_ast_pretty/src/pprust.rs
index cb48deb5886..53b6d536a4a 100644
--- a/compiler/rustc_ast_pretty/src/pprust.rs
+++ b/compiler/rustc_ast_pretty/src/pprust.rs
@@ -1507,11 +1507,10 @@ impl<'a> State<'a> {
                 self.s.word(";");
             }
             ast::StmtKind::MacCall(ref mac) => {
-                let (ref mac, style, ref attrs) = **mac;
                 self.space_if_not_bol();
-                self.print_outer_attributes(attrs);
-                self.print_mac(mac);
-                if style == ast::MacStmtStyle::Semicolon {
+                self.print_outer_attributes(&mac.attrs);
+                self.print_mac(&mac.mac);
+                if mac.style == ast::MacStmtStyle::Semicolon {
                     self.s.word(";");
                 }
             }
diff --git a/compiler/rustc_expand/src/expand.rs b/compiler/rustc_expand/src/expand.rs
index 7a21caf255a..8db16c169b0 100644
--- a/compiler/rustc_expand/src/expand.rs
+++ b/compiler/rustc_expand/src/expand.rs
@@ -13,7 +13,7 @@ use rustc_ast::token;
 use rustc_ast::tokenstream::TokenStream;
 use rustc_ast::visit::{self, AssocCtxt, Visitor};
 use rustc_ast::{self as ast, AttrItem, Block, LitKind, NodeId, PatKind, Path};
-use rustc_ast::{ItemKind, MacArgs, MacStmtStyle, StmtKind};
+use rustc_ast::{ItemKind, MacArgs, MacCallStmt, MacStmtStyle, StmtKind};
 use rustc_ast_pretty::pprust;
 use rustc_attr::{self as attr, is_builtin_attr, HasAttrs};
 use rustc_data_structures::map_in_place::MapInPlace;
@@ -1363,7 +1363,7 @@ impl<'a, 'b> MutVisitor for InvocationCollector<'a, 'b> {
         }
 
         if let StmtKind::MacCall(mac) = stmt.kind {
-            let (mac, style, attrs) = mac.into_inner();
+            let MacCallStmt { mac, style, attrs } = mac.into_inner();
             self.check_attributes(&attrs);
             let mut placeholder =
                 self.collect_bang(mac, stmt.span, AstFragmentKind::Stmts).make_stmts();
diff --git a/compiler/rustc_expand/src/placeholders.rs b/compiler/rustc_expand/src/placeholders.rs
index 29fb4c95ec6..dbd2e70af6a 100644
--- a/compiler/rustc_expand/src/placeholders.rs
+++ b/compiler/rustc_expand/src/placeholders.rs
@@ -92,7 +92,11 @@ pub fn placeholder(
             AstFragment::Ty(P(ast::Ty { id, span, kind: ast::TyKind::MacCall(mac_placeholder()) }))
         }
         AstFragmentKind::Stmts => AstFragment::Stmts(smallvec![{
-            let mac = P((mac_placeholder(), ast::MacStmtStyle::Braces, ast::AttrVec::new()));
+            let mac = P(ast::MacCallStmt {
+                mac: mac_placeholder(),
+                style: ast::MacStmtStyle::Braces,
+                attrs: ast::AttrVec::new(),
+            });
             ast::Stmt { id, span, kind: ast::StmtKind::MacCall(mac) }
         }]),
         AstFragmentKind::Arms => AstFragment::Arms(smallvec![ast::Arm {
@@ -293,7 +297,7 @@ impl<'a, 'b> MutVisitor for PlaceholderExpander<'a, 'b> {
 
     fn flat_map_stmt(&mut self, stmt: ast::Stmt) -> SmallVec<[ast::Stmt; 1]> {
         let (style, mut stmts) = match stmt.kind {
-            ast::StmtKind::MacCall(mac) => (mac.1, self.remove(stmt.id).make_stmts()),
+            ast::StmtKind::MacCall(mac) => (mac.style, self.remove(stmt.id).make_stmts()),
             _ => return noop_flat_map_stmt(stmt, self),
         };
 
diff --git a/compiler/rustc_parse/src/parser/stmt.rs b/compiler/rustc_parse/src/parser/stmt.rs
index ac067cb0eab..341590c622c 100644
--- a/compiler/rustc_parse/src/parser/stmt.rs
+++ b/compiler/rustc_parse/src/parser/stmt.rs
@@ -10,7 +10,7 @@ use rustc_ast as ast;
 use rustc_ast::ptr::P;
 use rustc_ast::token::{self, TokenKind};
 use rustc_ast::util::classify;
-use rustc_ast::{AttrStyle, AttrVec, Attribute, MacCall, MacStmtStyle};
+use rustc_ast::{AttrStyle, AttrVec, Attribute, MacCall, MacCallStmt, MacStmtStyle};
 use rustc_ast::{Block, BlockCheckMode, Expr, ExprKind, Local, Stmt, StmtKind, DUMMY_NODE_ID};
 use rustc_errors::{Applicability, PResult};
 use rustc_span::source_map::{BytePos, Span};
@@ -106,7 +106,7 @@ impl<'a> Parser<'a> {
 
         let kind = if delim == token::Brace || self.token == token::Semi || self.token == token::Eof
         {
-            StmtKind::MacCall(P((mac, style, attrs)))
+            StmtKind::MacCall(P(MacCallStmt { mac, style, attrs }))
         } else {
             // Since none of the above applied, this is an expression statement macro.
             let e = self.mk_expr(lo.to(hi), ExprKind::MacCall(mac), AttrVec::new());