Auto merge of #83188 - petrochenkov:field, r=lcnr

ast/hir: Rename field-related structures

I always forget what `ast::Field` and `ast::StructField` mean despite working with AST for long time, so this PR changes the naming to less confusing and more consistent.

- `StructField` -> `FieldDef` ("field definition")
- `Field` -> `ExprField` ("expression field", not "field expression")
- `FieldPat` -> `PatField` ("pattern field", not "field pattern")

Various visiting and other methods working with the fields are renamed correspondingly too.

The second commit reduces the size of `ExprKind` by boxing fields of `ExprKind::Struct` in preparation for https://github.com/rust-lang/rust/pull/80080.

clippy_lints/src/inconsistent_struct_constructor.rs

@@ -119,7 +119,7 @@ impl LateLintPass<'_> for InconsistentStructConstructor {
 
 // Check whether the order of the fields in the constructor is consistent with the order in the
 // definition.
-fn is_consistent_order<'tcx>(fields: &'tcx [hir::Field<'tcx>], def_order_map: &FxHashMap<Symbol, usize>) -> bool {
+fn is_consistent_order<'tcx>(fields: &'tcx [hir::ExprField<'tcx>], def_order_map: &FxHashMap<Symbol, usize>) -> bool {
     let mut cur_idx = usize::MIN;
     for f in fields {
         let next_idx = def_order_map[&f.ident.name];

clippy_lints/src/manual_non_exhaustive.rs

@@ -1,6 +1,6 @@
 use crate::utils::{meets_msrv, snippet_opt, span_lint_and_then};
 use if_chain::if_chain;
-use rustc_ast::ast::{Attribute, Item, ItemKind, StructField, Variant, VariantData, VisibilityKind};
+use rustc_ast::ast::{Attribute, Item, ItemKind, FieldDef, Variant, VariantData, VisibilityKind};
 use rustc_attr as attr;
 use rustc_errors::Applicability;
 use rustc_lint::{EarlyContext, EarlyLintPass};
@@ -142,11 +142,11 @@ fn check_manual_non_exhaustive_enum(cx: &EarlyContext<'_>, item: &Item, variants
 }
 
 fn check_manual_non_exhaustive_struct(cx: &EarlyContext<'_>, item: &Item, data: &VariantData) {
-    fn is_private(field: &StructField) -> bool {
+    fn is_private(field: &FieldDef) -> bool {
         matches!(field.vis.kind, VisibilityKind::Inherited)
     }
 
-    fn is_non_exhaustive_marker(field: &StructField) -> bool {
+    fn is_non_exhaustive_marker(field: &FieldDef) -> bool {
         is_private(field) && field.ty.kind.is_unit() && field.ident.map_or(true, |n| n.as_str().starts_with('_'))
     }
 

clippy_lints/src/missing_doc.rs

@@ -188,7 +188,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
         self.check_missing_docs_attrs(cx, attrs, impl_item.span, article, desc);
     }
 
-    fn check_struct_field(&mut self, cx: &LateContext<'tcx>, sf: &'tcx hir::StructField<'_>) {
+    fn check_field_def(&mut self, cx: &LateContext<'tcx>, sf: &'tcx hir::FieldDef<'_>) {
         if !sf.is_positional() {
             let attrs = cx.tcx.hir().attrs(sf.hir_id);
             self.check_missing_docs_attrs(cx, attrs, sf.span, "a", "struct field");

clippy_lints/src/pattern_type_mismatch.rs

@@ -1,6 +1,6 @@
 use crate::utils::{last_path_segment, span_lint_and_help};
 use rustc_hir::{
-    intravisit, Body, Expr, ExprKind, FieldPat, FnDecl, HirId, LocalSource, MatchSource, Mutability, Pat, PatKind,
+    intravisit, Body, Expr, ExprKind, PatField, FnDecl, HirId, LocalSource, MatchSource, Mutability, Pat, PatKind,
     QPath, Stmt, StmtKind,
 };
 use rustc_lint::{LateContext, LateLintPass, LintContext};
@@ -281,7 +281,7 @@ where
 
 fn find_first_mismatch_in_struct<'tcx>(
     cx: &LateContext<'tcx>,
-    field_pats: &[FieldPat<'_>],
+    field_pats: &[PatField<'_>],
     field_defs: &[FieldDef],
     substs_ref: SubstsRef<'tcx>,
 ) -> Option<(Span, Mutability, Level)> {

clippy_lints/src/redundant_field_names.rs

@@ -58,8 +58,8 @@ impl EarlyLintPass for RedundantFieldNames {
         if in_external_macro(cx.sess, expr.span) {
             return;
         }
-        if let ExprKind::Struct(_, ref fields, _) = expr.kind {
-            for field in fields {
+        if let ExprKind::Struct(ref se) = expr.kind {
+            for field in &se.fields {
                 if field.is_shorthand {
                     continue;
                 }

clippy_lints/src/suspicious_operation_groupings.rs

@@ -564,7 +564,7 @@ fn ident_difference_expr_with_base_location(
         | (Try(_), Try(_))
         | (Paren(_), Paren(_))
         | (Repeat(_, _), Repeat(_, _))
-        | (Struct(_, _, _), Struct(_, _, _))
+        | (Struct(_), Struct(_))
         | (MacCall(_), MacCall(_))
         | (LlvmInlineAsm(_), LlvmInlineAsm(_))
         | (InlineAsm(_), InlineAsm(_))

clippy_lints/src/types/mod.rs

@@ -271,7 +271,7 @@ impl<'tcx> LateLintPass<'tcx> for Types {
         self.check_fn_decl(cx, decl);
     }
 
-    fn check_struct_field(&mut self, cx: &LateContext<'_>, field: &hir::StructField<'_>) {
+    fn check_field_def(&mut self, cx: &LateContext<'_>, field: &hir::FieldDef<'_>) {
         self.check_ty(cx, &field.ty, false);
     }
 
@@ -821,7 +821,7 @@ impl<'tcx> LateLintPass<'tcx> for TypeComplexity {
         self.check_fndecl(cx, decl);
     }
 
-    fn check_struct_field(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::StructField<'_>) {
+    fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::FieldDef<'_>) {
         // enum variants are also struct fields now
         self.check_type(cx, &field.ty);
     }

clippy_lints/src/unnested_or_patterns.rs

@@ -276,7 +276,7 @@ fn transform_with_focus_on_idx(alternatives: &mut Vec<P<Pat>>, focus_idx: usize)
 /// and check that all `fp_i` where `i ∈ ((0...n) \ k)` between two patterns are equal.
 fn extend_with_struct_pat(
     path1: &ast::Path,
-    fps1: &mut Vec<ast::FieldPat>,
+    fps1: &mut Vec<ast::PatField>,
     rest1: bool,
     start: usize,
     alternatives: &mut Vec<P<Pat>>,

clippy_lints/src/utils/author.rs

@@ -101,12 +101,12 @@ impl<'tcx> LateLintPass<'tcx> for Author {
         done();
     }
 
-    fn check_struct_field(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::StructField<'_>) {
+    fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &'tcx hir::FieldDef<'_>) {
         if !has_attr(cx, field.hir_id) {
             return;
         }
         prelude();
-        PrintVisitor::new("field").visit_struct_field(field);
+        PrintVisitor::new("field").visit_field_def(field);
         done();
     }
 

clippy_lints/src/utils/inspector.rs

@@ -80,8 +80,8 @@ impl<'tcx> LateLintPass<'tcx> for DeepCodeInspector {
     // }
     // }
     //
-    // fn check_struct_field(&mut self, cx: &LateContext<'tcx>, field: &'tcx
-    // hir::StructField) {
+    // fn check_field_def(&mut self, cx: &LateContext<'tcx>, field: &'tcx
+    // hir::FieldDef) {
     // if !has_attr(&field.attrs) {
     // return;
     // }

clippy_utils/src/ast_utils.rs

@@ -66,7 +66,7 @@ pub fn eq_range_end(l: &RangeEnd, r: &RangeEnd) -> bool {
     }
 }
 
-pub fn eq_field_pat(l: &FieldPat, r: &FieldPat) -> bool {
+pub fn eq_field_pat(l: &PatField, r: &PatField) -> bool {
     l.is_placeholder == r.is_placeholder
         && eq_id(l.ident, r.ident)
         && eq_pat(&l.pat, &r.pat)
@@ -168,14 +168,16 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
         (AddrOf(lbk, lm, le), AddrOf(rbk, rm, re)) => lbk == rbk && lm == rm && eq_expr(le, re),
         (Path(lq, lp), Path(rq, rp)) => both(lq, rq, |l, r| eq_qself(l, r)) && eq_path(lp, rp),
         (MacCall(l), MacCall(r)) => eq_mac_call(l, r),
-        (Struct(lp, lfs, lb), Struct(rp, rfs, rb)) => {
-            eq_path(lp, rp) && eq_struct_rest(lb, rb) && unordered_over(lfs, rfs, |l, r| eq_field(l, r))
+        (Struct(lse), Struct(rse)) => {
+            eq_path(&lse.path, &rse.path) &&
+            eq_struct_rest(&lse.rest, &rse.rest) &&
+            unordered_over(&lse.fields, &rse.fields, |l, r| eq_field(l, r))
         },
         _ => false,
     }
 }
 
-pub fn eq_field(l: &Field, r: &Field) -> bool {
+pub fn eq_field(l: &ExprField, r: &ExprField) -> bool {
     l.is_placeholder == r.is_placeholder
         && eq_id(l.ident, r.ident)
         && eq_expr(&l.expr, &r.expr)
@@ -359,7 +361,7 @@ pub fn eq_variant_data(l: &VariantData, r: &VariantData) -> bool {
     }
 }
 
-pub fn eq_struct_field(l: &StructField, r: &StructField) -> bool {
+pub fn eq_struct_field(l: &FieldDef, r: &FieldDef) -> bool {
     l.is_placeholder == r.is_placeholder
         && over(&l.attrs, &r.attrs, |l, r| eq_attr(l, r))
         && eq_vis(&l.vis, &r.vis)

clippy_utils/src/higher.rs

@@ -51,7 +51,7 @@ pub struct Range<'a> {
 pub fn range<'a>(expr: &'a hir::Expr<'_>) -> Option<Range<'a>> {
     /// Finds the field named `name` in the field. Always return `Some` for
     /// convenience.
-    fn get_field<'c>(name: &str, fields: &'c [hir::Field<'_>]) -> Option<&'c hir::Expr<'c>> {
+    fn get_field<'c>(name: &str, fields: &'c [hir::ExprField<'_>]) -> Option<&'c hir::Expr<'c>> {
         let expr = &fields.iter().find(|field| field.ident.name.as_str() == name)?.expr;
 
         Some(expr)

clippy_utils/src/hir_utils.rs

@@ -5,7 +5,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_hir::def::Res;
 use rustc_hir::{
-    BinOpKind, Block, BlockCheckMode, BodyId, BorrowKind, CaptureBy, Expr, ExprKind, Field, FieldPat, FnRetTy,
+    BinOpKind, Block, BlockCheckMode, BodyId, BorrowKind, CaptureBy, Expr, ExprKind, ExprField, PatField, FnRetTy,
     GenericArg, GenericArgs, Guard, HirId, InlineAsmOperand, Lifetime, LifetimeName, ParamName, Pat, PatKind, Path,
     PathSegment, QPath, Stmt, StmtKind, Ty, TyKind, TypeBinding,
 };
@@ -266,7 +266,7 @@ impl HirEqInterExpr<'_, '_, '_> {
         over(left, right, |l, r| self.eq_expr(l, r))
     }
 
-    fn eq_field(&mut self, left: &Field<'_>, right: &Field<'_>) -> bool {
+    fn eq_field(&mut self, left: &ExprField<'_>, right: &ExprField<'_>) -> bool {
         left.ident.name == right.ident.name && self.eq_expr(&left.expr, &right.expr)
     }
 
@@ -290,8 +290,8 @@ impl HirEqInterExpr<'_, '_, '_> {
         left.name == right.name
     }
 
-    fn eq_fieldpat(&mut self, left: &FieldPat<'_>, right: &FieldPat<'_>) -> bool {
-        let (FieldPat { ident: li, pat: lp, .. }, FieldPat { ident: ri, pat: rp, .. }) = (&left, &right);
+    fn eq_fieldpat(&mut self, left: &PatField<'_>, right: &PatField<'_>) -> bool {
+        let (PatField { ident: li, pat: lp, .. }, PatField { ident: ri, pat: rp, .. }) = (&left, &right);
         li.name == ri.name && self.eq_pat(lp, rp)
     }