support 2018 paths

3 files changed, 21 insertions, 3 deletions

diff --git a/crates/ra_syntax/src/grammar/paths.rs b/crates/ra_syntax/src/grammar/paths.rs
index 7c9fb8be2..b6d44d53a 100644
--- a/crates/ra_syntax/src/grammar/paths.rs
+++ b/crates/ra_syntax/src/grammar/paths.rs
@@ -1,11 +1,11 @@
 use super::*;
 
 pub(super) const PATH_FIRST: TokenSet =
-    token_set![IDENT, SELF_KW, SUPER_KW, COLONCOLON, L_ANGLE];
+    token_set![IDENT, SELF_KW, SUPER_KW, CRATE_KW, COLONCOLON, L_ANGLE];
 
 pub(super) fn is_path_start(p: &Parser) -> bool {
     match p.current() {
-        IDENT | SELF_KW | SUPER_KW | COLONCOLON => true,
+        IDENT | SELF_KW | SUPER_KW | CRATE_KW | COLONCOLON => true,
         _ => false,
     }
 }
@@ -74,7 +74,9 @@ fn path_segment(p: &mut Parser, mode: Mode, first: bool) {
                 name_ref(p);
                 opt_path_type_args(p, mode);
             }
-            SELF_KW | SUPER_KW => p.bump(),
+            // test crate_path
+            // use crate::foo;
+            SELF_KW | SUPER_KW | CRATE_KW => p.bump(),
             _ => {
                 p.err_and_bump("expected identifier");
             }
diff --git a/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.rs b/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.rs
new file mode 100644
index 000000000..1bbb5930b
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.rs
@@ -0,0 +1 @@
+use crate::foo;
diff --git a/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.txt b/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.txt
new file mode 100644
index 000000000..4c871ccdd
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/0112_crate_path.txt
@@ -0,0 +1,15 @@
+ROOT@[0; 16)
+  USE_ITEM@[0; 15)
+    USE_KW@[0; 3)
+    WHITESPACE@[3; 4)
+    USE_TREE@[4; 14)
+      PATH@[4; 14)
+        PATH@[4; 9)
+          PATH_SEGMENT@[4; 9)
+            CRATE_KW@[4; 9)
+        COLONCOLON@[9; 11)
+        PATH_SEGMENT@[11; 14)
+          NAME_REF@[11; 14)
+            IDENT@[11; 14) "foo"
+    SEMI@[14; 15)
+  WHITESPACE@[15; 16)