7 files changed, 67 insertions, 8 deletions

diff --git a/grammar.ron b/grammar.ron
index e7acd3cb0..53248519f 100644
--- a/grammar.ron
+++ b/grammar.ron
@@ -24,6 +24,7 @@ Grammar(
         "match",
         "const",
         "static",
+        "mut",
     ],
     tokens: [
         "ERROR",
@@ -87,6 +88,7 @@ Grammar(
         "EXTERN_CRATE_ITEM",
         "MOD_ITEM",
         "USE_ITEM",
+        "STATIC_ITEM",
 
         "EXTERN_BLOCK",
         "ENUM_VARIANT",
diff --git a/src/parser/event_parser/grammar/items/mod.rs b/src/parser/event_parser/grammar/items/mod.rs
index 35825e7c4..9930de347 100644
--- a/src/parser/event_parser/grammar/items/mod.rs
+++ b/src/parser/event_parser/grammar/items/mod.rs
@@ -46,6 +46,10 @@ fn item(p: &mut Parser) {
                 }
             }
         }
+        STATIC_KW => {
+            static_item(p);
+            STATIC_ITEM
+        }
         MOD_KW => {
             mod_item(p);
             MOD_ITEM
@@ -92,6 +96,24 @@ fn extern_crate_item(p: &mut Parser) {
     p.expect(IDENT) && alias(p) && p.expect(SEMI);
 }
 
+fn extern_block(p: &mut Parser) {
+    assert!(p.at(L_CURLY));
+    p.bump();
+    p.expect(R_CURLY);
+}
+
+fn static_item(p: &mut Parser) {
+    assert!(p.at(STATIC_KW));
+    p.bump();
+    p.eat(MUT_KW);
+    p.expect(IDENT);
+    p.expect(COLON);
+    types::type_ref(p);
+    p.expect(EQ);
+    expressions::expr(p);
+    p.expect(SEMI);
+}
+
 fn mod_item(p: &mut Parser) {
     assert!(p.at(MOD_KW));
     p.bump();
@@ -104,12 +126,6 @@ fn mod_item(p: &mut Parser) {
     }
 }
 
-fn extern_block(p: &mut Parser) {
-    assert!(p.at(L_CURLY));
-    p.bump();
-    p.expect(R_CURLY);
-}
-
 fn abi(p: &mut Parser) {
     assert!(p.at(EXTERN_KW));
     let abi = p.start();
diff --git a/src/syntax_kinds.rs b/src/syntax_kinds.rs
index f5d01c6f3..8d21d3fb7 100644
--- a/src/syntax_kinds.rs
+++ b/src/syntax_kinds.rs
@@ -30,6 +30,7 @@ pub enum SyntaxKind {
     MATCH_KW,
     CONST_KW,
     STATIC_KW,
+    MUT_KW,
     ERROR,
     IDENT,
     UNDERSCORE,
@@ -88,6 +89,7 @@ pub enum SyntaxKind {
     EXTERN_CRATE_ITEM,
     MOD_ITEM,
     USE_ITEM,
+    STATIC_ITEM,
     EXTERN_BLOCK,
     ENUM_VARIANT,
     NAMED_FIELD,
@@ -141,6 +143,7 @@ impl SyntaxKind {
             MATCH_KW => &SyntaxInfo { name: "MATCH_KW" },
             CONST_KW => &SyntaxInfo { name: "CONST_KW" },
             STATIC_KW => &SyntaxInfo { name: "STATIC_KW" },
+            MUT_KW => &SyntaxInfo { name: "MUT_KW" },
             ERROR => &SyntaxInfo { name: "ERROR" },
             IDENT => &SyntaxInfo { name: "IDENT" },
             UNDERSCORE => &SyntaxInfo { name: "UNDERSCORE" },
@@ -199,6 +202,7 @@ impl SyntaxKind {
             EXTERN_CRATE_ITEM => &SyntaxInfo { name: "EXTERN_CRATE_ITEM" },
             MOD_ITEM => &SyntaxInfo { name: "MOD_ITEM" },
             USE_ITEM => &SyntaxInfo { name: "USE_ITEM" },
+            STATIC_ITEM => &SyntaxInfo { name: "STATIC_ITEM" },
             EXTERN_BLOCK => &SyntaxInfo { name: "EXTERN_BLOCK" },
             ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
@@ -248,6 +252,7 @@ pub(crate) fn ident_to_keyword(ident: &str) -> Option<SyntaxKind> {
         "match" => Some(MATCH_KW),
         "const" => Some(CONST_KW),
         "static" => Some(STATIC_KW),
+        "mut" => Some(MUT_KW),
         _ => None,
     }
 }
diff --git a/tests/data/lexer/0011_keywords.rs b/tests/data/lexer/0011_keywords.rs
index 7a1000bb7..b74fc606e 100644
--- a/tests/data/lexer/0011_keywords.rs
+++ b/tests/data/lexer/0011_keywords.rs
@@ -1,2 +1,3 @@
 fn use struct trait enum impl true false as extern crate
-mod pub self super in where for loop while if match const static
+mod pub self super in where for loop while if match const
+static mut
diff --git a/tests/data/lexer/0011_keywords.txt b/tests/data/lexer/0011_keywords.txt
index b38b4bd64..05b1f0995 100644
--- a/tests/data/lexer/0011_keywords.txt
+++ b/tests/data/lexer/0011_keywords.txt
@@ -43,6 +43,8 @@ WHITESPACE 1 " "
 MATCH_KW 5 "match"
 WHITESPACE 1 " "
 CONST_KW 5 "const"
-WHITESPACE 1 " "
+WHITESPACE 1 "\n"
 STATIC_KW 6 "static"
+WHITESPACE 1 " "
+MUT_KW 3 "mut"
 WHITESPACE 1 "\n"
diff --git a/tests/data/parser/ok/0023_static_items.rs b/tests/data/parser/ok/0023_static_items.rs
new file mode 100644
index 000000000..5fb92ce33
--- /dev/null
+++ b/tests/data/parser/ok/0023_static_items.rs
@@ -0,0 +1,2 @@
+static FOO: u32 = 1;
+static mut BAR: i32 = 92;
diff --git a/tests/data/parser/ok/0023_static_items.txt b/tests/data/parser/ok/0023_static_items.txt
new file mode 100644
index 000000000..7cd2228fa
--- /dev/null
+++ b/tests/data/parser/ok/0023_static_items.txt
@@ -0,0 +1,31 @@
+FILE@[0; 47)
+  STATIC_ITEM@[0; 21)
+    STATIC_KW@[0; 6)
+    WHITESPACE@[6; 7)
+    IDENT@[7; 10) "FOO"
+    COLON@[10; 11)
+    WHITESPACE@[11; 12)
+    IDENT@[12; 15) "u32"
+    WHITESPACE@[15; 16)
+    EQ@[16; 17)
+    LITERAL@[17; 19)
+      WHITESPACE@[17; 18)
+      INT_NUMBER@[18; 19)
+    SEMI@[19; 20)
+    WHITESPACE@[20; 21)
+  STATIC_ITEM@[21; 47)
+    STATIC_KW@[21; 27)
+    WHITESPACE@[27; 28)
+    MUT_KW@[28; 31)
+    WHITESPACE@[31; 32)
+    IDENT@[32; 35) "BAR"
+    COLON@[35; 36)
+    WHITESPACE@[36; 37)
+    IDENT@[37; 40) "i32"
+    WHITESPACE@[40; 41)
+    EQ@[41; 42)
+    LITERAL@[42; 45)
+      WHITESPACE@[42; 43)
+      INT_NUMBER@[43; 45)
+    SEMI@[45; 46)
+    WHITESPACE@[46; 47)