10 files changed, 156 insertions, 72 deletions

diff --git a/grammar.ron b/grammar.ron
index ed3af53e4..ca6299f23 100644
--- a/grammar.ron
+++ b/grammar.ron
@@ -15,6 +15,7 @@ Grammar(
         "pub",
         "self",
         "super",
+        "in",
     ],
     tokens: [
         "ERROR",
diff --git a/src/parser/event_parser/grammar/paths.rs b/src/parser/event_parser/grammar/paths.rs
index 108545bc2..d6887a9ba 100644
--- a/src/parser/event_parser/grammar/paths.rs
+++ b/src/parser/event_parser/grammar/paths.rs
@@ -1,7 +1,7 @@
 use super::*;
 
 pub(crate) fn use_path(p: &mut Parser) {
-    if !AnyOf(&[IDENT, COLONCOLON]).is_ahead(p) {
+    if !AnyOf(&[IDENT, SELF_KW, SUPER_KW, COLONCOLON]).is_ahead(p) {
         return;
     }
     let mut prev = p.mark();
@@ -23,6 +23,15 @@ fn path_segment(p: &mut Parser, first: bool) {
         if first {
             p.eat(COLONCOLON);
         }
-        p.expect(IDENT);
+        match p.current() {
+            IDENT | SELF_KW | SUPER_KW => {
+                p.bump();
+            },
+            _ => {
+                p.error()
+                    .message("expected identifier")
+                    .emit();
+            }
+        };
     })
 }
\ No newline at end of file
diff --git a/src/syntax_kinds.rs b/src/syntax_kinds.rs
index 84f1072b7..48f55fa97 100644
--- a/src/syntax_kinds.rs
+++ b/src/syntax_kinds.rs
@@ -16,73 +16,74 @@ pub const MOD_KW: SyntaxKind = SyntaxKind(11);
 pub const PUB_KW: SyntaxKind = SyntaxKind(12);
 pub const SELF_KW: SyntaxKind = SyntaxKind(13);
 pub const SUPER_KW: SyntaxKind = SyntaxKind(14);
-pub const ERROR: SyntaxKind = SyntaxKind(15);
-pub const IDENT: SyntaxKind = SyntaxKind(16);
-pub const UNDERSCORE: SyntaxKind = SyntaxKind(17);
-pub const WHITESPACE: SyntaxKind = SyntaxKind(18);
-pub const INT_NUMBER: SyntaxKind = SyntaxKind(19);
-pub const FLOAT_NUMBER: SyntaxKind = SyntaxKind(20);
-pub const SEMI: SyntaxKind = SyntaxKind(21);
-pub const COMMA: SyntaxKind = SyntaxKind(22);
-pub const DOT: SyntaxKind = SyntaxKind(23);
-pub const DOTDOT: SyntaxKind = SyntaxKind(24);
-pub const DOTDOTDOT: SyntaxKind = SyntaxKind(25);
-pub const DOTDOTEQ: SyntaxKind = SyntaxKind(26);
-pub const L_PAREN: SyntaxKind = SyntaxKind(27);
-pub const R_PAREN: SyntaxKind = SyntaxKind(28);
-pub const L_CURLY: SyntaxKind = SyntaxKind(29);
-pub const R_CURLY: SyntaxKind = SyntaxKind(30);
-pub const L_BRACK: SyntaxKind = SyntaxKind(31);
-pub const R_BRACK: SyntaxKind = SyntaxKind(32);
-pub const L_ANGLE: SyntaxKind = SyntaxKind(33);
-pub const R_ANGLE: SyntaxKind = SyntaxKind(34);
-pub const AT: SyntaxKind = SyntaxKind(35);
-pub const POUND: SyntaxKind = SyntaxKind(36);
-pub const TILDE: SyntaxKind = SyntaxKind(37);
-pub const QUESTION: SyntaxKind = SyntaxKind(38);
-pub const COLON: SyntaxKind = SyntaxKind(39);
-pub const COLONCOLON: SyntaxKind = SyntaxKind(40);
-pub const DOLLAR: SyntaxKind = SyntaxKind(41);
-pub const EQ: SyntaxKind = SyntaxKind(42);
-pub const EQEQ: SyntaxKind = SyntaxKind(43);
-pub const FAT_ARROW: SyntaxKind = SyntaxKind(44);
-pub const NEQ: SyntaxKind = SyntaxKind(45);
-pub const EXCL: SyntaxKind = SyntaxKind(46);
-pub const LIFETIME: SyntaxKind = SyntaxKind(47);
-pub const CHAR: SyntaxKind = SyntaxKind(48);
-pub const BYTE: SyntaxKind = SyntaxKind(49);
-pub const STRING: SyntaxKind = SyntaxKind(50);
-pub const RAW_STRING: SyntaxKind = SyntaxKind(51);
-pub const BYTE_STRING: SyntaxKind = SyntaxKind(52);
-pub const RAW_BYTE_STRING: SyntaxKind = SyntaxKind(53);
-pub const PLUS: SyntaxKind = SyntaxKind(54);
-pub const MINUS: SyntaxKind = SyntaxKind(55);
-pub const STAR: SyntaxKind = SyntaxKind(56);
-pub const SLASH: SyntaxKind = SyntaxKind(57);
-pub const CARET: SyntaxKind = SyntaxKind(58);
-pub const PERCENT: SyntaxKind = SyntaxKind(59);
-pub const AMPERSAND: SyntaxKind = SyntaxKind(60);
-pub const PIPE: SyntaxKind = SyntaxKind(61);
-pub const THIN_ARROW: SyntaxKind = SyntaxKind(62);
-pub const COMMENT: SyntaxKind = SyntaxKind(63);
-pub const DOC_COMMENT: SyntaxKind = SyntaxKind(64);
-pub const SHEBANG: SyntaxKind = SyntaxKind(65);
-pub const FILE: SyntaxKind = SyntaxKind(66);
-pub const STRUCT_ITEM: SyntaxKind = SyntaxKind(67);
-pub const STRUCT_FIELD: SyntaxKind = SyntaxKind(68);
-pub const FN_ITEM: SyntaxKind = SyntaxKind(69);
-pub const EXTERN_CRATE_ITEM: SyntaxKind = SyntaxKind(70);
-pub const ATTR: SyntaxKind = SyntaxKind(71);
-pub const META_ITEM: SyntaxKind = SyntaxKind(72);
-pub const MOD_ITEM: SyntaxKind = SyntaxKind(73);
-pub const USE_ITEM: SyntaxKind = SyntaxKind(74);
-pub const PATH: SyntaxKind = SyntaxKind(75);
-pub const PATH_SEGMENT: SyntaxKind = SyntaxKind(76);
-pub const LITERAL: SyntaxKind = SyntaxKind(77);
-pub const ALIAS: SyntaxKind = SyntaxKind(78);
-pub const VISIBILITY: SyntaxKind = SyntaxKind(79);
+pub const IN_KW: SyntaxKind = SyntaxKind(15);
+pub const ERROR: SyntaxKind = SyntaxKind(16);
+pub const IDENT: SyntaxKind = SyntaxKind(17);
+pub const UNDERSCORE: SyntaxKind = SyntaxKind(18);
+pub const WHITESPACE: SyntaxKind = SyntaxKind(19);
+pub const INT_NUMBER: SyntaxKind = SyntaxKind(20);
+pub const FLOAT_NUMBER: SyntaxKind = SyntaxKind(21);
+pub const SEMI: SyntaxKind = SyntaxKind(22);
+pub const COMMA: SyntaxKind = SyntaxKind(23);
+pub const DOT: SyntaxKind = SyntaxKind(24);
+pub const DOTDOT: SyntaxKind = SyntaxKind(25);
+pub const DOTDOTDOT: SyntaxKind = SyntaxKind(26);
+pub const DOTDOTEQ: SyntaxKind = SyntaxKind(27);
+pub const L_PAREN: SyntaxKind = SyntaxKind(28);
+pub const R_PAREN: SyntaxKind = SyntaxKind(29);
+pub const L_CURLY: SyntaxKind = SyntaxKind(30);
+pub const R_CURLY: SyntaxKind = SyntaxKind(31);
+pub const L_BRACK: SyntaxKind = SyntaxKind(32);
+pub const R_BRACK: SyntaxKind = SyntaxKind(33);
+pub const L_ANGLE: SyntaxKind = SyntaxKind(34);
+pub const R_ANGLE: SyntaxKind = SyntaxKind(35);
+pub const AT: SyntaxKind = SyntaxKind(36);
+pub const POUND: SyntaxKind = SyntaxKind(37);
+pub const TILDE: SyntaxKind = SyntaxKind(38);
+pub const QUESTION: SyntaxKind = SyntaxKind(39);
+pub const COLON: SyntaxKind = SyntaxKind(40);
+pub const COLONCOLON: SyntaxKind = SyntaxKind(41);
+pub const DOLLAR: SyntaxKind = SyntaxKind(42);
+pub const EQ: SyntaxKind = SyntaxKind(43);
+pub const EQEQ: SyntaxKind = SyntaxKind(44);
+pub const FAT_ARROW: SyntaxKind = SyntaxKind(45);
+pub const NEQ: SyntaxKind = SyntaxKind(46);
+pub const EXCL: SyntaxKind = SyntaxKind(47);
+pub const LIFETIME: SyntaxKind = SyntaxKind(48);
+pub const CHAR: SyntaxKind = SyntaxKind(49);
+pub const BYTE: SyntaxKind = SyntaxKind(50);
+pub const STRING: SyntaxKind = SyntaxKind(51);
+pub const RAW_STRING: SyntaxKind = SyntaxKind(52);
+pub const BYTE_STRING: SyntaxKind = SyntaxKind(53);
+pub const RAW_BYTE_STRING: SyntaxKind = SyntaxKind(54);
+pub const PLUS: SyntaxKind = SyntaxKind(55);
+pub const MINUS: SyntaxKind = SyntaxKind(56);
+pub const STAR: SyntaxKind = SyntaxKind(57);
+pub const SLASH: SyntaxKind = SyntaxKind(58);
+pub const CARET: SyntaxKind = SyntaxKind(59);
+pub const PERCENT: SyntaxKind = SyntaxKind(60);
+pub const AMPERSAND: SyntaxKind = SyntaxKind(61);
+pub const PIPE: SyntaxKind = SyntaxKind(62);
+pub const THIN_ARROW: SyntaxKind = SyntaxKind(63);
+pub const COMMENT: SyntaxKind = SyntaxKind(64);
+pub const DOC_COMMENT: SyntaxKind = SyntaxKind(65);
+pub const SHEBANG: SyntaxKind = SyntaxKind(66);
+pub const FILE: SyntaxKind = SyntaxKind(67);
+pub const STRUCT_ITEM: SyntaxKind = SyntaxKind(68);
+pub const STRUCT_FIELD: SyntaxKind = SyntaxKind(69);
+pub const FN_ITEM: SyntaxKind = SyntaxKind(70);
+pub const EXTERN_CRATE_ITEM: SyntaxKind = SyntaxKind(71);
+pub const ATTR: SyntaxKind = SyntaxKind(72);
+pub const META_ITEM: SyntaxKind = SyntaxKind(73);
+pub const MOD_ITEM: SyntaxKind = SyntaxKind(74);
+pub const USE_ITEM: SyntaxKind = SyntaxKind(75);
+pub const PATH: SyntaxKind = SyntaxKind(76);
+pub const PATH_SEGMENT: SyntaxKind = SyntaxKind(77);
+pub const LITERAL: SyntaxKind = SyntaxKind(78);
+pub const ALIAS: SyntaxKind = SyntaxKind(79);
+pub const VISIBILITY: SyntaxKind = SyntaxKind(80);
 
-static INFOS: [SyntaxInfo; 80] = [
+static INFOS: [SyntaxInfo; 81] = [
     SyntaxInfo { name: "USE_KW" },
     SyntaxInfo { name: "FN_KW" },
     SyntaxInfo { name: "STRUCT_KW" },
@@ -98,6 +99,7 @@ static INFOS: [SyntaxInfo; 80] = [
     SyntaxInfo { name: "PUB_KW" },
     SyntaxInfo { name: "SELF_KW" },
     SyntaxInfo { name: "SUPER_KW" },
+    SyntaxInfo { name: "IN_KW" },
     SyntaxInfo { name: "ERROR" },
     SyntaxInfo { name: "IDENT" },
     SyntaxInfo { name: "UNDERSCORE" },
@@ -186,6 +188,7 @@ pub(crate) fn ident_to_keyword(ident: &str) -> Option<SyntaxKind> {
        "pub" => Some(PUB_KW),
        "self" => Some(SELF_KW),
        "super" => Some(SUPER_KW),
+       "in" => Some(IN_KW),
        _ => None,
    }
 }
diff --git a/tests/data/lexer/0011_keywords.rs b/tests/data/lexer/0011_keywords.rs
index c5a58a205..aa729cdbd 100644
--- a/tests/data/lexer/0011_keywords.rs
+++ b/tests/data/lexer/0011_keywords.rs
@@ -1,2 +1 @@
-fn use struct trait enum impl true false as extern crate mod pub self super
-
+fn use struct trait enum impl true false as extern crate mod pub self super in
diff --git a/tests/data/lexer/0011_keywords.txt b/tests/data/lexer/0011_keywords.txt
index 248628f34..8a1f525ac 100644
--- a/tests/data/lexer/0011_keywords.txt
+++ b/tests/data/lexer/0011_keywords.txt
@@ -27,4 +27,6 @@ WHITESPACE 1 " "
 SELF_KW 4 "self"
 WHITESPACE 1 " "
 SUPER_KW 5 "super"
-WHITESPACE 2 "\n\n"
+WHITESPACE 1 " "
+IN_KW 2 "in"
+WHITESPACE 1 "\n"
diff --git a/tests/data/parser/err/0004_use_path_bad_segment.rs b/tests/data/parser/err/0004_use_path_bad_segment.rs
new file mode 100644
index 000000000..060e65d06
--- /dev/null
+++ b/tests/data/parser/err/0004_use_path_bad_segment.rs
@@ -0,0 +1 @@
+use foo::92;
\ No newline at end of file
diff --git a/tests/data/parser/err/0004_use_path_bad_segment.txt b/tests/data/parser/err/0004_use_path_bad_segment.txt
new file mode 100644
index 000000000..241ee8562
--- /dev/null
+++ b/tests/data/parser/err/0004_use_path_bad_segment.txt
@@ -0,0 +1,16 @@
+FILE@[0; 12)
+  USE_ITEM@[0; 9)
+    USE_KW@[0; 3)
+    PATH@[3; 9)
+      PATH@[3; 7)
+        PATH_SEGMENT@[3; 7)
+          WHITESPACE@[3; 4)
+          IDENT@[4; 7)
+      COLONCOLON@[7; 9)
+      PATH_SEGMENT@[9; 9)
+      err: `expected identifier`
+    err: `expected SEMI`
+  ERROR@[9; 12)
+  err: `expected item`
+    INT_NUMBER@[9; 11)
+    SEMI@[11; 12)
diff --git a/tests/data/parser/ok/0012_visibility.txt b/tests/data/parser/ok/0012_visibility.txt
index 8324c48d5..0e091724d 100644
--- a/tests/data/parser/ok/0012_visibility.txt
+++ b/tests/data/parser/ok/0012_visibility.txt
@@ -58,7 +58,7 @@ FILE@[0; 98)
     VISIBILITY@[66; 88)
       PUB_KW@[66; 69)
       L_PAREN@[69; 70)
-      IDENT@[70; 72)
+      IN_KW@[70; 72)
       PATH@[72; 86)
         PATH@[72; 81)
           PATH@[72; 76)
diff --git a/tests/data/parser/ok/0013_use_path_self_super.rs b/tests/data/parser/ok/0013_use_path_self_super.rs
new file mode 100644
index 000000000..faf6a42c7
--- /dev/null
+++ b/tests/data/parser/ok/0013_use_path_self_super.rs
@@ -0,0 +1,3 @@
+use self::foo;
+use super::super::bar;
+use ::self::a::super::bar;
diff --git a/tests/data/parser/ok/0013_use_path_self_super.txt b/tests/data/parser/ok/0013_use_path_self_super.txt
new file mode 100644
index 000000000..90bbb9b2d
--- /dev/null
+++ b/tests/data/parser/ok/0013_use_path_self_super.txt
@@ -0,0 +1,50 @@
+FILE@[0; 65)
+  USE_ITEM@[0; 15)
+    USE_KW@[0; 3)
+    PATH@[3; 13)
+      PATH@[3; 8)
+        PATH_SEGMENT@[3; 8)
+          WHITESPACE@[3; 4)
+          SELF_KW@[4; 8)
+      COLONCOLON@[8; 10)
+      PATH_SEGMENT@[10; 13)
+        IDENT@[10; 13)
+    SEMI@[13; 14)
+    WHITESPACE@[14; 15)
+  USE_ITEM@[15; 38)
+    USE_KW@[15; 18)
+    PATH@[18; 36)
+      PATH@[18; 31)
+        PATH@[18; 24)
+          PATH_SEGMENT@[18; 24)
+            WHITESPACE@[18; 19)
+            SUPER_KW@[19; 24)
+        COLONCOLON@[24; 26)
+        PATH_SEGMENT@[26; 31)
+          SUPER_KW@[26; 31)
+      COLONCOLON@[31; 33)
+      PATH_SEGMENT@[33; 36)
+        IDENT@[33; 36)
+    SEMI@[36; 37)
+    WHITESPACE@[37; 38)
+  USE_ITEM@[38; 65)
+    USE_KW@[38; 41)
+    PATH@[41; 63)
+      PATH@[41; 58)
+        PATH@[41; 51)
+          PATH@[41; 48)
+            PATH_SEGMENT@[41; 48)
+              WHITESPACE@[41; 42)
+              COLONCOLON@[42; 44)
+              SELF_KW@[44; 48)
+          COLONCOLON@[48; 50)
+          PATH_SEGMENT@[50; 51)
+            IDENT@[50; 51)
+        COLONCOLON@[51; 53)
+        PATH_SEGMENT@[53; 58)
+          SUPER_KW@[53; 58)
+      COLONCOLON@[58; 60)
+      PATH_SEGMENT@[60; 63)
+        IDENT@[60; 63)
+    SEMI@[63; 64)
+    WHITESPACE@[64; 65)