From bcbfa2cc1146dfa23acb3e61f7ec053733a8fac1 Mon Sep 17 00:00:00 2001
From: Marcus Klaas de Vries <mail@marcusklaas.nl>
Date: Fri, 18 Jan 2019 15:38:11 +0100
Subject: Finish move of StructField for pattern type inference

---
 crates/ra_hir/src/code_model_api.rs                | 18 +++++++--
 crates/ra_hir/src/ty.rs                            | 13 +++---
 .../data/parser/inline/ok/0102_field_pat_list.txt  | 46 ++++++++++++----------
 3 files changed, 46 insertions(+), 31 deletions(-)

diff --git a/crates/ra_hir/src/code_model_api.rs b/crates/ra_hir/src/code_model_api.rs
index 860fd7539..11e919c1a 100644
--- a/crates/ra_hir/src/code_model_api.rs
+++ b/crates/ra_hir/src/code_model_api.rs
@@ -158,7 +158,7 @@ impl Module {
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct StructField {
-    struct_: Struct,
+    parent: DefId,
     name: Name,
 }
 
@@ -166,8 +166,9 @@ impl StructField {
     pub fn name(&self) -> &Name {
         &self.name
     }
+
     pub fn ty(&self, db: &impl HirDatabase) -> Option<Ty> {
-        db.type_for_field(self.struct_.def_id, self.name.clone())
+        db.type_for_field(self.parent, self.name.clone())
     }
 }
 
@@ -191,7 +192,7 @@ impl Struct {
             .fields()
             .iter()
             .map(|it| StructField {
-                struct_: self.clone(),
+                parent: self.def_id,
                 name: it.name.clone(),
             })
             .collect()
@@ -255,6 +256,17 @@ impl EnumVariant {
         db.enum_variant_data(self.def_id).variant_data.clone()
     }
 
+    pub fn fields(&self, db: &impl HirDatabase) -> Vec<StructField> {
+        self.variant_data(db)
+            .fields()
+            .iter()
+            .map(|it| StructField {
+                parent: self.def_id,
+                name: it.name.clone(),
+            })
+            .collect()
+    }
+
     pub fn source(&self, db: &impl HirDatabase) -> (HirFileId, TreeArc<ast::EnumVariant>) {
         def_id_to_ast(db, self.def_id)
     }
diff --git a/crates/ra_hir/src/ty.rs b/crates/ra_hir/src/ty.rs
index b880fb3d8..8d6493887 100644
--- a/crates/ra_hir/src/ty.rs
+++ b/crates/ra_hir/src/ty.rs
@@ -872,22 +872,19 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
         }
     }
 
-    // TODO: add fields method for tuple like structs and variants
-    // TODO: and add tests!
-
     fn resolve_fields(&self, path: Option<&Path>) -> Option<(Ty, Vec<StructField>)> {
         let def_id = self.module.resolve_path(self.db, path?).take_types()?;
         let def = def_id.resolve(self.db);
 
         match def {
             Def::Struct(s) => {
-                let fields: Vec<_> = s.fields(self.db);
+                let fields = s.fields(self.db);
                 Some((type_for_struct(self.db, s), fields))
             }
-            // Def::EnumVariant(ev) => {
-            //     let fields: Vec<_> = ev.variant_data(self.db).fields().to_owned();
-            //     Some((type_for_enum_variant(self.db, ev), fields))
-            // }
+            Def::EnumVariant(ev) => {
+                let fields = ev.fields(self.db);
+                Some((type_for_enum_variant(self.db, ev), fields))
+            }
             _ => None,
         }
     }
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0102_field_pat_list.txt b/crates/ra_syntax/tests/data/parser/inline/ok/0102_field_pat_list.txt
index 13a51a9d9..ec48eada1 100644
--- a/crates/ra_syntax/tests/data/parser/inline/ok/0102_field_pat_list.txt
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0102_field_pat_list.txt
@@ -43,18 +43,20 @@ SOURCE_FILE@[0; 119)
           FIELD_PAT_LIST@[40; 56)
             L_CURLY@[40; 41)
             WHITESPACE@[41; 42)
-            BIND_PAT@[42; 43)
-              NAME@[42; 43)
-                IDENT@[42; 43) "f"
+            FIELD_PAT@[42; 43)
+              BIND_PAT@[42; 43)
+                NAME@[42; 43)
+                  IDENT@[42; 43) "f"
             COMMA@[43; 44)
             WHITESPACE@[44; 45)
-            BIND_PAT@[45; 54)
-              REF_KW@[45; 48)
-              WHITESPACE@[48; 49)
-              MUT_KW@[49; 52)
-              WHITESPACE@[52; 53)
-              NAME@[53; 54)
-                IDENT@[53; 54) "g"
+            FIELD_PAT@[45; 54)
+              BIND_PAT@[45; 54)
+                REF_KW@[45; 48)
+                WHITESPACE@[48; 49)
+                MUT_KW@[49; 52)
+                WHITESPACE@[52; 53)
+                NAME@[53; 54)
+                  IDENT@[53; 54) "g"
             WHITESPACE@[54; 55)
             R_CURLY@[55; 56)
         WHITESPACE@[56; 57)
@@ -77,11 +79,13 @@ SOURCE_FILE@[0; 119)
           FIELD_PAT_LIST@[73; 84)
             L_CURLY@[73; 74)
             WHITESPACE@[74; 75)
-            IDENT@[75; 76) "h"
-            COLON@[76; 77)
-            WHITESPACE@[77; 78)
-            PLACEHOLDER_PAT@[78; 79)
-              UNDERSCORE@[78; 79)
+            FIELD_PAT@[75; 79)
+              NAME@[75; 76)
+                IDENT@[75; 76) "h"
+              COLON@[76; 77)
+              WHITESPACE@[77; 78)
+              PLACEHOLDER_PAT@[78; 79)
+                UNDERSCORE@[78; 79)
             COMMA@[79; 80)
             WHITESPACE@[80; 81)
             DOTDOT@[81; 83)
@@ -106,11 +110,13 @@ SOURCE_FILE@[0; 119)
           FIELD_PAT_LIST@[101; 110)
             L_CURLY@[101; 102)
             WHITESPACE@[102; 103)
-            IDENT@[103; 104) "h"
-            COLON@[104; 105)
-            WHITESPACE@[105; 106)
-            PLACEHOLDER_PAT@[106; 107)
-              UNDERSCORE@[106; 107)
+            FIELD_PAT@[103; 107)
+              NAME@[103; 104)
+                IDENT@[103; 104) "h"
+              COLON@[104; 105)
+              WHITESPACE@[105; 106)
+              PLACEHOLDER_PAT@[106; 107)
+                UNDERSCORE@[106; 107)
             COMMA@[107; 108)
             WHITESPACE@[108; 109)
             R_CURLY@[109; 110)
-- 
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