Add AST for extern crate

Also change it to parse the crate name as a NAME_REF, not a NAME.

5 files changed, 16 insertions, 6 deletions

diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 60480c699..a8d60e882 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -970,7 +970,15 @@ impl ToOwned for ExternCrateItem {
 }
 
 
-impl ExternCrateItem {}
+impl ExternCrateItem {
+    pub fn name_ref(&self) -> Option<&NameRef> {
+        super::child_opt(self)
+    }
+
+    pub fn alias(&self) -> Option<&Alias> {
+        super::child_opt(self)
+    }
+}
 
 // FalseKw
 #[derive(Debug, PartialEq, Eq, Hash)]
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index a2ccd7cb9..2ed1fd1b8 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -601,7 +601,9 @@ Grammar(
         "UseTreeList": (
             collections: [["use_trees", "UseTree"]]
         ),
-        "ExternCrateItem": (),
+        "ExternCrateItem": (
+            options: ["NameRef", "Alias"],
+        ),
         "ArgList": (
             collections: [
                 ["args", "Expr"]
diff --git a/crates/ra_syntax/src/grammar/items.rs b/crates/ra_syntax/src/grammar/items.rs
index 18039cd3f..84c18a293 100644
--- a/crates/ra_syntax/src/grammar/items.rs
+++ b/crates/ra_syntax/src/grammar/items.rs
@@ -247,7 +247,7 @@ fn extern_crate_item(p: &mut Parser) {
     p.bump();
     assert!(p.at(CRATE_KW));
     p.bump();
-    name(p);
+    name_ref(p);
     opt_alias(p);
     p.expect(SEMI);
 }
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0060_extern_crate.txt b/crates/ra_syntax/tests/data/parser/inline/ok/0060_extern_crate.txt
index 7ffdc7fbd..a7b428787 100644
--- a/crates/ra_syntax/tests/data/parser/inline/ok/0060_extern_crate.txt
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0060_extern_crate.txt
@@ -4,7 +4,7 @@ SOURCE_FILE@[0; 18)
     WHITESPACE@[6; 7)
     CRATE_KW@[7; 12)
     WHITESPACE@[12; 13)
-    NAME@[13; 16)
+    NAME_REF@[13; 16)
       IDENT@[13; 16) "foo"
     SEMI@[16; 17)
   WHITESPACE@[17; 18)
diff --git a/crates/ra_syntax/tests/data/parser/ok/0007_extern_crate.txt b/crates/ra_syntax/tests/data/parser/ok/0007_extern_crate.txt
index 5adf3f276..5558d952e 100644
--- a/crates/ra_syntax/tests/data/parser/ok/0007_extern_crate.txt
+++ b/crates/ra_syntax/tests/data/parser/ok/0007_extern_crate.txt
@@ -4,7 +4,7 @@ SOURCE_FILE@[0; 43)
     WHITESPACE@[6; 7)
     CRATE_KW@[7; 12)
     WHITESPACE@[12; 13)
-    NAME@[13; 16)
+    NAME_REF@[13; 16)
       IDENT@[13; 16) "foo"
     SEMI@[16; 17)
   WHITESPACE@[17; 18)
@@ -13,7 +13,7 @@ SOURCE_FILE@[0; 43)
     WHITESPACE@[24; 25)
     CRATE_KW@[25; 30)
     WHITESPACE@[30; 31)
-    NAME@[31; 34)
+    NAME_REF@[31; 34)
       IDENT@[31; 34) "foo"
     WHITESPACE@[34; 35)
     ALIAS@[35; 41)