7 files changed, 53 insertions, 1 deletions

diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index b7a2d1c01..66f1339c1 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -59,6 +59,7 @@ Grammar(
         [">>=", "SHREQ"],
     ],
     keywords: [
+        "async",
         "use",
         "fn",
         "struct",
diff --git a/crates/ra_syntax/tests/data/lexer/0011_keywords.rs b/crates/ra_syntax/tests/data/lexer/0011_keywords.rs
index e6bf64d4d..1e91bff4e 100644
--- a/crates/ra_syntax/tests/data/lexer/0011_keywords.rs
+++ b/crates/ra_syntax/tests/data/lexer/0011_keywords.rs
@@ -1,3 +1,3 @@
-fn use struct trait enum impl true false as extern crate
+async fn use struct trait enum impl true false as extern crate
 mod pub self super in where for loop while if match const
 static mut type ref let else move return
diff --git a/crates/ra_syntax/tests/data/lexer/0011_keywords.txt b/crates/ra_syntax/tests/data/lexer/0011_keywords.txt
index d6a1abe8a..22c00eefb 100644
--- a/crates/ra_syntax/tests/data/lexer/0011_keywords.txt
+++ b/crates/ra_syntax/tests/data/lexer/0011_keywords.txt
@@ -1,3 +1,5 @@
+ASYNC_KW 5 "async"
+WHITESPACE 1 " "
 FN_KW 2 "fn"
 WHITESPACE 1 " "
 USE_KW 3 "use"
diff --git a/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.rs b/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.rs
new file mode 100644
index 000000000..9a423248c
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.rs
@@ -0,0 +1 @@
+fn foo() { let _ = async {} }
diff --git a/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.txt b/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.txt
new file mode 100644
index 000000000..bb9a2d029
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/err/0007_async_without_semicolon.txt
@@ -0,0 +1,31 @@
+SOURCE_FILE@[0; 30)
+  FN_DEF@[0; 29)
+    FN_KW@[0; 2)
+    WHITESPACE@[2; 3)
+    NAME@[3; 6)
+      IDENT@[3; 6) "foo"
+    PARAM_LIST@[6; 8)
+      L_PAREN@[6; 7)
+      R_PAREN@[7; 8)
+    WHITESPACE@[8; 9)
+    BLOCK@[9; 29)
+      L_CURLY@[9; 10)
+      WHITESPACE@[10; 11)
+      LET_STMT@[11; 27)
+        LET_KW@[11; 14)
+        WHITESPACE@[14; 15)
+        PLACEHOLDER_PAT@[15; 16)
+          UNDERSCORE@[15; 16)
+        WHITESPACE@[16; 17)
+        EQ@[17; 18)
+        WHITESPACE@[18; 19)
+        BLOCK_EXPR@[19; 27)
+          ASYNC_KW@[19; 24)
+          WHITESPACE@[24; 25)
+          BLOCK@[25; 27)
+            L_CURLY@[25; 26)
+            R_CURLY@[26; 27)
+            err: `expected SEMI`
+      WHITESPACE@[27; 28)
+      R_CURLY@[28; 29)
+  WHITESPACE@[29; 30)
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.rs b/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.rs
new file mode 100644
index 000000000..f4adcb62b
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.rs
@@ -0,0 +1 @@
+async fn foo() {}
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.txt b/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.txt
new file mode 100644
index 000000000..d1a706ecc
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0124_async_fn.txt
@@ -0,0 +1,16 @@
+SOURCE_FILE@[0; 18)
+  FN_DEF@[0; 17)
+    ASYNC_KW@[0; 5)
+    WHITESPACE@[5; 6)
+    FN_KW@[6; 8)
+    WHITESPACE@[8; 9)
+    NAME@[9; 12)
+      IDENT@[9; 12) "foo"
+    PARAM_LIST@[12; 14)
+      L_PAREN@[12; 13)
+      R_PAREN@[13; 14)
+    WHITESPACE@[14; 15)
+    BLOCK@[15; 17)
+      L_CURLY@[15; 16)
+      R_CURLY@[16; 17)
+  WHITESPACE@[17; 18)