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-rw-r--r--crates/ra_hir/src/ty/infer/coerce.rs13
-rw-r--r--crates/ra_hir/src/ty/infer/expr.rs11
-rw-r--r--crates/ra_hir/src/ty/infer/pat.rs9
3 files changed, 22 insertions, 11 deletions
diff --git a/crates/ra_hir/src/ty/infer/coerce.rs b/crates/ra_hir/src/ty/infer/coerce.rs
index 4ea038d99..54765da35 100644
--- a/crates/ra_hir/src/ty/infer/coerce.rs
+++ b/crates/ra_hir/src/ty/infer/coerce.rs
@@ -245,14 +245,17 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
245 ty_app!(TypeCtor::Adt(Adt::Struct(struct1)), st1), 245 ty_app!(TypeCtor::Adt(Adt::Struct(struct1)), st1),
246 ty_app!(TypeCtor::Adt(Adt::Struct(struct2)), st2), 246 ty_app!(TypeCtor::Adt(Adt::Struct(struct2)), st2),
247 ) if struct1 == struct2 => { 247 ) if struct1 == struct2 => {
248 let fields = struct1.fields(self.db); 248 let field_tys = self.db.field_types(struct1.id.into());
249 let (last_field, prev_fields) = fields.split_last()?; 249 let struct_data = self.db.struct_data(struct1.id.0);
250
251 let mut fields = struct_data.variant_data.fields().iter();
252 let (last_field_id, _data) = fields.next_back()?;
250 253
251 // Get the generic parameter involved in the last field. 254 // Get the generic parameter involved in the last field.
252 let unsize_generic_index = { 255 let unsize_generic_index = {
253 let mut index = None; 256 let mut index = None;
254 let mut multiple_param = false; 257 let mut multiple_param = false;
255 last_field.ty(self.db).walk(&mut |ty| match ty { 258 field_tys[last_field_id].walk(&mut |ty| match ty {
256 &Ty::Param { idx, .. } => { 259 &Ty::Param { idx, .. } => {
257 if index.is_none() { 260 if index.is_none() {
258 index = Some(idx); 261 index = Some(idx);
@@ -271,8 +274,8 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
271 274
272 // Check other fields do not involve it. 275 // Check other fields do not involve it.
273 let mut multiple_used = false; 276 let mut multiple_used = false;
274 prev_fields.iter().for_each(|field| { 277 fields.for_each(|(field_id, _data)| {
275 field.ty(self.db).walk(&mut |ty| match ty { 278 field_tys[field_id].walk(&mut |ty| match ty {
276 &Ty::Param { idx, .. } if idx == unsize_generic_index => { 279 &Ty::Param { idx, .. } if idx == unsize_generic_index => {
277 multiple_used = true 280 multiple_used = true
278 } 281 }
diff --git a/crates/ra_hir/src/ty/infer/expr.rs b/crates/ra_hir/src/ty/infer/expr.rs
index 2996920c6..663ff9435 100644
--- a/crates/ra_hir/src/ty/infer/expr.rs
+++ b/crates/ra_hir/src/ty/infer/expr.rs
@@ -214,6 +214,8 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
214 self.unify(&ty, &expected.ty); 214 self.unify(&ty, &expected.ty);
215 215
216 let substs = ty.substs().unwrap_or_else(Substs::empty); 216 let substs = ty.substs().unwrap_or_else(Substs::empty);
217 let field_types =
218 def_id.map(|it| self.db.field_types(it.into())).unwrap_or_default();
217 for (field_idx, field) in fields.iter().enumerate() { 219 for (field_idx, field) in fields.iter().enumerate() {
218 let field_def = def_id.and_then(|it| match it.field(self.db, &field.name) { 220 let field_def = def_id.and_then(|it| match it.field(self.db, &field.name) {
219 Some(field) => Some(field), 221 Some(field) => Some(field),
@@ -228,8 +230,9 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
228 if let Some(field_def) = field_def { 230 if let Some(field_def) = field_def {
229 self.result.record_field_resolutions.insert(field.expr, field_def); 231 self.result.record_field_resolutions.insert(field.expr, field_def);
230 } 232 }
231 let field_ty = 233 let field_ty = field_def
232 field_def.map_or(Ty::Unknown, |field| field.ty(self.db)).subst(&substs); 234 .map_or(Ty::Unknown, |it| field_types[it.id].clone())
235 .subst(&substs);
233 self.infer_expr_coerce(field.expr, &Expectation::has_type(field_ty)); 236 self.infer_expr_coerce(field.expr, &Expectation::has_type(field_ty));
234 } 237 }
235 if let Some(expr) = spread { 238 if let Some(expr) = spread {
@@ -252,7 +255,9 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
252 .and_then(|idx| a_ty.parameters.0.get(idx).cloned()), 255 .and_then(|idx| a_ty.parameters.0.get(idx).cloned()),
253 TypeCtor::Adt(Adt::Struct(s)) => s.field(self.db, name).map(|field| { 256 TypeCtor::Adt(Adt::Struct(s)) => s.field(self.db, name).map(|field| {
254 self.write_field_resolution(tgt_expr, field); 257 self.write_field_resolution(tgt_expr, field);
255 field.ty(self.db).subst(&a_ty.parameters) 258 self.db.field_types(s.id.into())[field.id]
259 .clone()
260 .subst(&a_ty.parameters)
256 }), 261 }),
257 _ => None, 262 _ => None,
258 }, 263 },
diff --git a/crates/ra_hir/src/ty/infer/pat.rs b/crates/ra_hir/src/ty/infer/pat.rs
index c125ddfbc..641d61e87 100644
--- a/crates/ra_hir/src/ty/infer/pat.rs
+++ b/crates/ra_hir/src/ty/infer/pat.rs
@@ -27,10 +27,11 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
27 27
28 let substs = ty.substs().unwrap_or_else(Substs::empty); 28 let substs = ty.substs().unwrap_or_else(Substs::empty);
29 29
30 let field_tys = def.map(|it| self.db.field_types(it.into())).unwrap_or_default();
30 for (i, &subpat) in subpats.iter().enumerate() { 31 for (i, &subpat) in subpats.iter().enumerate() {
31 let expected_ty = def 32 let expected_ty = def
32 .and_then(|d| d.field(self.db, &Name::new_tuple_field(i))) 33 .and_then(|d| d.field(self.db, &Name::new_tuple_field(i)))
33 .map_or(Ty::Unknown, |field| field.ty(self.db)) 34 .map_or(Ty::Unknown, |field| field_tys[field.id].clone())
34 .subst(&substs); 35 .subst(&substs);
35 let expected_ty = self.normalize_associated_types_in(expected_ty); 36 let expected_ty = self.normalize_associated_types_in(expected_ty);
36 self.infer_pat(subpat, &expected_ty, default_bm); 37 self.infer_pat(subpat, &expected_ty, default_bm);
@@ -56,10 +57,12 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
56 57
57 let substs = ty.substs().unwrap_or_else(Substs::empty); 58 let substs = ty.substs().unwrap_or_else(Substs::empty);
58 59
60 let field_tys = def.map(|it| self.db.field_types(it.into())).unwrap_or_default();
59 for subpat in subpats { 61 for subpat in subpats {
60 let matching_field = def.and_then(|it| it.field(self.db, &subpat.name)); 62 let matching_field = def.and_then(|it| it.field(self.db, &subpat.name));
61 let expected_ty = 63 let expected_ty = matching_field
62 matching_field.map_or(Ty::Unknown, |field| field.ty(self.db)).subst(&substs); 64 .map_or(Ty::Unknown, |field| field_tys[field.id].clone())
65 .subst(&substs);
63 let expected_ty = self.normalize_associated_types_in(expected_ty); 66 let expected_ty = self.normalize_associated_types_in(expected_ty);
64 self.infer_pat(subpat.pat, &expected_ty, default_bm); 67 self.infer_pat(subpat.pat, &expected_ty, default_bm);
65 } 68 }