infer: remove `record_field_resolutions` field

It stores no useful data, since we can derive all fields from
`variant_resolutions`

6 files changed, 13 insertions, 34 deletions

diff --git a/crates/hir_ty/src/diagnostics/expr.rs b/crates/hir_ty/src/diagnostics/expr.rs
index d7bf9fdf7..79602c3dd 100644
--- a/crates/hir_ty/src/diagnostics/expr.rs
+++ b/crates/hir_ty/src/diagnostics/expr.rs
@@ -14,7 +14,6 @@ use crate::{
         MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkOrSomeInTailExpr,
         MissingPatFields, RemoveThisSemicolon,
     },
-    utils::variant_data,
     AdtId, InferenceResult, Interner, TyExt, TyKind,
 };
 
@@ -104,7 +103,7 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
             let root = source_ptr.file_syntax(db.upcast());
             if let ast::Expr::RecordExpr(record_expr) = &source_ptr.value.to_node(&root) {
                 if let Some(_) = record_expr.record_expr_field_list() {
-                    let variant_data = variant_data(db.upcast(), variant_def);
+                    let variant_data = variant_def.variant_data(db.upcast());
                     let missed_fields = missed_fields
                         .into_iter()
                         .map(|idx| variant_data.fields()[idx].name.clone())
@@ -135,7 +134,7 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
                 let root = source_ptr.file_syntax(db.upcast());
                 if let ast::Pat::RecordPat(record_pat) = expr.to_node(&root) {
                     if let Some(_) = record_pat.record_pat_field_list() {
-                        let variant_data = variant_data(db.upcast(), variant_def);
+                        let variant_data = variant_def.variant_data(db.upcast());
                         let missed_fields = missed_fields
                             .into_iter()
                             .map(|idx| variant_data.fields()[idx].name.clone())
@@ -453,7 +452,7 @@ pub fn record_literal_missing_fields(
         return None;
     }
 
-    let variant_data = variant_data(db.upcast(), variant_def);
+    let variant_data = variant_def.variant_data(db.upcast());
 
     let specified_fields: FxHashSet<_> = fields.iter().map(|f| &f.name).collect();
     let missed_fields: Vec<LocalFieldId> = variant_data
@@ -483,7 +482,7 @@ pub fn record_pattern_missing_fields(
         return None;
     }
 
-    let variant_data = variant_data(db.upcast(), variant_def);
+    let variant_data = variant_def.variant_data(db.upcast());
 
     let specified_fields: FxHashSet<_> = fields.iter().map(|f| &f.name).collect();
     let missed_fields: Vec<LocalFieldId> = variant_data
diff --git a/crates/hir_ty/src/infer.rs b/crates/hir_ty/src/infer.rs
index 5146d873b..c63878e7a 100644
--- a/crates/hir_ty/src/infer.rs
+++ b/crates/hir_ty/src/infer.rs
@@ -131,8 +131,6 @@ pub struct InferenceResult {
     method_resolutions: FxHashMap<ExprId, FunctionId>,
     /// For each field access expr, records the field it resolves to.
     field_resolutions: FxHashMap<ExprId, FieldId>,
-    /// For each field in record literal, records the field it resolves to.
-    record_field_resolutions: FxHashMap<ExprId, FieldId>,
     record_pat_field_resolutions: FxHashMap<PatId, FieldId>,
     /// For each struct literal, records the variant it resolves to.
     variant_resolutions: FxHashMap<ExprOrPatId, VariantId>,
@@ -153,9 +151,6 @@ impl InferenceResult {
     pub fn field_resolution(&self, expr: ExprId) -> Option<FieldId> {
         self.field_resolutions.get(&expr).copied()
     }
-    pub fn record_field_resolution(&self, expr: ExprId) -> Option<FieldId> {
-        self.record_field_resolutions.get(&expr).copied()
-    }
     pub fn record_pat_field_resolution(&self, pat: PatId) -> Option<FieldId> {
         self.record_pat_field_resolutions.get(&pat).copied()
     }
diff --git a/crates/hir_ty/src/infer/expr.rs b/crates/hir_ty/src/infer/expr.rs
index 5b3cdab4e..9ab0fa212 100644
--- a/crates/hir_ty/src/infer/expr.rs
+++ b/crates/hir_ty/src/infer/expr.rs
@@ -21,7 +21,7 @@ use crate::{
     primitive::{self, UintTy},
     static_lifetime, to_chalk_trait_id,
     traits::{chalk::from_chalk, FnTrait},
-    utils::{generics, variant_data, Generics},
+    utils::{generics, Generics},
     AdtId, Binders, CallableDefId, FnPointer, FnSig, FnSubst, InEnvironment, Interner,
     ProjectionTyExt, Rawness, Scalar, Substitution, TraitRef, Ty, TyBuilder, TyExt, TyKind,
     TypeWalk,
@@ -414,7 +414,7 @@ impl<'a> InferenceContext<'a> {
 
                 let substs = ty.substs().cloned().unwrap_or_else(|| Substitution::empty(&Interner));
                 let field_types = def_id.map(|it| self.db.field_types(it)).unwrap_or_default();
-                let variant_data = def_id.map(|it| variant_data(self.db.upcast(), it));
+                let variant_data = def_id.map(|it| it.variant_data(self.db.upcast()));
                 for field in fields.iter() {
                     let field_def =
                         variant_data.as_ref().and_then(|it| match it.field(&field.name) {
@@ -426,9 +426,6 @@ impl<'a> InferenceContext<'a> {
                                 None
                             }
                         });
-                    if let Some(field_def) = field_def {
-                        self.result.record_field_resolutions.insert(field.expr, field_def);
-                    }
                     let field_ty = field_def.map_or(self.err_ty(), |it| {
                         field_types[it.local_id].clone().substitute(&Interner, &substs)
                     });
diff --git a/crates/hir_ty/src/infer/pat.rs b/crates/hir_ty/src/infer/pat.rs
index 12431ae07..942f70edf 100644
--- a/crates/hir_ty/src/infer/pat.rs
+++ b/crates/hir_ty/src/infer/pat.rs
@@ -13,8 +13,8 @@ use hir_expand::name::Name;
 
 use super::{BindingMode, Expectation, InferenceContext};
 use crate::{
-    lower::lower_to_chalk_mutability, static_lifetime, utils::variant_data, Interner, Substitution,
-    Ty, TyBuilder, TyExt, TyKind,
+    lower::lower_to_chalk_mutability, static_lifetime, Interner, Substitution, Ty, TyBuilder,
+    TyExt, TyKind,
 };
 
 impl<'a> InferenceContext<'a> {
@@ -28,7 +28,7 @@ impl<'a> InferenceContext<'a> {
         ellipsis: Option<usize>,
     ) -> Ty {
         let (ty, def) = self.resolve_variant(path);
-        let var_data = def.map(|it| variant_data(self.db.upcast(), it));
+        let var_data = def.map(|it| it.variant_data(self.db.upcast()));
         if let Some(variant) = def {
             self.write_variant_resolution(id.into(), variant);
         }
@@ -68,7 +68,7 @@ impl<'a> InferenceContext<'a> {
         id: PatId,
     ) -> Ty {
         let (ty, def) = self.resolve_variant(path);
-        let var_data = def.map(|it| variant_data(self.db.upcast(), it));
+        let var_data = def.map(|it| it.variant_data(self.db.upcast()));
         if let Some(variant) = def {
             self.write_variant_resolution(id.into(), variant);
         }
diff --git a/crates/hir_ty/src/lower.rs b/crates/hir_ty/src/lower.rs
index 8be1bcddb..4ca6aa538 100644
--- a/crates/hir_ty/src/lower.rs
+++ b/crates/hir_ty/src/lower.rs
@@ -30,8 +30,7 @@ use crate::{
     dummy_usize_const, static_lifetime, to_assoc_type_id, to_chalk_trait_id, to_placeholder_idx,
     traits::chalk::{Interner, ToChalk},
     utils::{
-        all_super_trait_refs, associated_type_by_name_including_super_traits, generics,
-        variant_data, Generics,
+        all_super_trait_refs, associated_type_by_name_including_super_traits, generics, Generics,
     },
     AliasEq, AliasTy, Binders, BoundVar, CallableSig, DebruijnIndex, DynTy, FnPointer, FnSig,
     FnSubst, ImplTraitId, OpaqueTy, PolyFnSig, ProjectionTy, QuantifiedWhereClause,
@@ -879,7 +878,7 @@ pub(crate) fn field_types_query(
     db: &dyn HirDatabase,
     variant_id: VariantId,
 ) -> Arc<ArenaMap<LocalFieldId, Binders<Ty>>> {
-    let var_data = variant_data(db.upcast(), variant_id);
+    let var_data = variant_id.variant_data(db.upcast());
     let (resolver, def): (_, GenericDefId) = match variant_id {
         VariantId::StructId(it) => (it.resolver(db.upcast()), it.into()),
         VariantId::UnionId(it) => (it.resolver(db.upcast()), it.into()),
diff --git a/crates/hir_ty/src/utils.rs b/crates/hir_ty/src/utils.rs
index d11708299..0a424f607 100644
--- a/crates/hir_ty/src/utils.rs
+++ b/crates/hir_ty/src/utils.rs
@@ -4,7 +4,6 @@ use std::sync::Arc;
 
 use chalk_ir::{BoundVar, DebruijnIndex};
 use hir_def::{
-    adt::VariantData,
     db::DefDatabase,
     generics::{
         GenericParams, TypeParamData, TypeParamProvenance, WherePredicate, WherePredicateTypeTarget,
@@ -13,7 +12,7 @@ use hir_def::{
     path::Path,
     resolver::{HasResolver, TypeNs},
     type_ref::TypeRef,
-    AssocContainerId, GenericDefId, Lookup, TraitId, TypeAliasId, TypeParamId, VariantId,
+    AssocContainerId, GenericDefId, Lookup, TraitId, TypeAliasId, TypeParamId,
 };
 use hir_expand::name::{name, Name};
 
@@ -136,16 +135,6 @@ pub(super) fn associated_type_by_name_including_super_traits(
     })
 }
 
-pub(super) fn variant_data(db: &dyn DefDatabase, var: VariantId) -> Arc<VariantData> {
-    match var {
-        VariantId::StructId(it) => db.struct_data(it).variant_data.clone(),
-        VariantId::UnionId(it) => db.union_data(it).variant_data.clone(),
-        VariantId::EnumVariantId(it) => {
-            db.enum_data(it.parent).variants[it.local_id].variant_data.clone()
-        }
-    }
-}
-
 /// Helper for mutating `Arc<[T]>` (i.e. `Arc::make_mut` for Arc slices).
 /// The underlying values are cloned if there are other strong references.
 pub(crate) fn make_mut_slice<T: Clone>(a: &mut Arc<[T]>) -> &mut [T] {