Make edition handling a bit nicer and allow specifying edition in crate_graph macro

crates/ra_db/src/input.rs

@@ -62,6 +62,15 @@ pub enum Edition {
     Edition2015,
 }
 
+impl Edition {
+    pub fn from_string(s: &str) -> Edition {
+        match s {
+            "2015" => Edition::Edition2015,
+            "2018" | _ => Edition::Edition2018,
+        }
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 struct CrateData {
     file_id: FileId,

crates/ra_hir/src/mock.rs

@@ -59,12 +59,12 @@ impl MockDatabase {
     pub fn set_crate_graph_from_fixture(&mut self, graph: CrateGraphFixture) {
         let mut ids = FxHashMap::default();
         let mut crate_graph = CrateGraph::default();
-        for (crate_name, (crate_root, _)) in graph.0.iter() {
+        for (crate_name, (crate_root, edition, _)) in graph.0.iter() {
             let crate_root = self.file_id_of(&crate_root);
-            let crate_id = crate_graph.add_crate_root(crate_root, Edition::Edition2018);
+            let crate_id = crate_graph.add_crate_root(crate_root, *edition);
             ids.insert(crate_name, crate_id);
         }
-        for (crate_name, (_, deps)) in graph.0.iter() {
+        for (crate_name, (_, _, deps)) in graph.0.iter() {
             let from = ids[crate_name];
             for dep in deps {
                 let to = ids[dep];
@@ -233,16 +233,19 @@ impl MockDatabase {
 }
 
 #[derive(Default)]
-pub struct CrateGraphFixture(pub FxHashMap<String, (String, Vec<String>)>);
+pub struct CrateGraphFixture(pub FxHashMap<String, (String, Edition, Vec<String>)>);
 
 #[macro_export]
 macro_rules! crate_graph {
-    ($($crate_name:literal: ($crate_path:literal, [$($dep:literal),*]),)*) => {{
+    ($($crate_name:literal: ($crate_path:literal, $($edition:literal,)? [$($dep:literal),*]),)*) => {{
         let mut res = $crate::mock::CrateGraphFixture::default();
         $(
+            #[allow(unused_mut, unused_assignments)]
+            let mut edition = ra_db::Edition::Edition2018;
+            $(edition = ra_db::Edition::from_string($edition);)?
             res.0.insert(
                 $crate_name.to_string(),
-                ($crate_path.to_string(), vec![$($dep.to_string()),*])
+                ($crate_path.to_string(), edition, vec![$($dep.to_string()),*])
             );
         )*
         res

crates/ra_hir/src/nameres/tests.rs

@@ -267,7 +267,6 @@ fn glob_across_crates() {
 
 #[test]
 fn edition_2015_imports() {
-    use ra_db::{CrateGraph, Edition};
     let mut db = MockDatabase::with_files(
         "
         //- /main.rs
@@ -285,17 +284,12 @@ fn edition_2015_imports() {
         struct FromLib;
     ",
     );
-    let main_id = db.file_id_of("/main.rs");
-    let lib_id = db.file_id_of("/lib.rs");
+    db.set_crate_graph_from_fixture(crate_graph! {
+        "main": ("/main.rs", "2015", ["other_crate"]),
+        "other_crate": ("/lib.rs", "2018", []),
+    });
     let foo_id = db.file_id_of("/foo.rs");
 
-    let mut crate_graph = CrateGraph::default();
-    let main_crate = crate_graph.add_crate_root(main_id, Edition::Edition2015);
-    let lib_crate = crate_graph.add_crate_root(lib_id, Edition::Edition2018);
-    crate_graph.add_dep(main_crate, "other_crate".into(), lib_crate).unwrap();
-
-    db.set_crate_graph(Arc::new(crate_graph));
-
     let module = crate::source_binder::module_from_file_id(&db, foo_id).unwrap();
     let krate = module.krate(&db).unwrap();
     let item_map = db.item_map(krate);

crates/ra_project_model/src/cargo_workspace.rs

@@ -4,6 +4,7 @@ use cargo_metadata::{MetadataCommand, CargoOpt};
 use ra_arena::{Arena, RawId, impl_arena_id};
 use rustc_hash::FxHashMap;
 use failure::format_err;
+use ra_db::Edition;
 
 use crate::Result;
 
@@ -35,7 +36,7 @@ struct PackageData {
     targets: Vec<Target>,
     is_member: bool,
     dependencies: Vec<PackageDependency>,
-    edition: String,
+    edition: Edition,
 }
 
 #[derive(Debug, Clone)]
@@ -85,8 +86,8 @@ impl Package {
     pub fn root(self, ws: &CargoWorkspace) -> &Path {
         ws.packages[self].manifest.parent().unwrap()
     }
-    pub fn edition(self, ws: &CargoWorkspace) -> &str {
-        &ws.packages[self].edition
+    pub fn edition(self, ws: &CargoWorkspace) -> Edition {
+        ws.packages[self].edition
     }
     pub fn targets<'a>(self, ws: &'a CargoWorkspace) -> impl Iterator<Item = Target> + 'a {
         ws.packages[self].targets.iter().cloned()
@@ -139,7 +140,7 @@ impl CargoWorkspace {
                 manifest: meta_pkg.manifest_path.clone(),
                 targets: Vec::new(),
                 is_member,
-                edition: meta_pkg.edition,
+                edition: Edition::from_string(&meta_pkg.edition),
                 dependencies: Vec::new(),
             });
             let pkg_data = &mut packages[pkg];

crates/ra_project_model/src/lib.rs

@@ -63,11 +63,7 @@ impl ProjectWorkspace {
             for tgt in pkg.targets(&self.cargo) {
                 let root = tgt.root(&self.cargo);
                 if let Some(file_id) = load(root) {
-                    let edition = if pkg.edition(&self.cargo) == "2015" {
-                        Edition::Edition2015
-                    } else {
-                        Edition::Edition2018
-                    };
+                    let edition = pkg.edition(&self.cargo);
                     let crate_id = crate_graph.add_crate_root(file_id, edition);
                     if tgt.kind(&self.cargo) == TargetKind::Lib {
                         lib_tgt = Some(crate_id);