10 files changed, 107 insertions, 9 deletions

diff --git a/crates/ra_syntax/src/lexer.rs b/crates/ra_syntax/src/lexer.rs
index c6acd095e..f9362120e 100644
--- a/crates/ra_syntax/src/lexer.rs
+++ b/crates/ra_syntax/src/lexer.rs
@@ -190,17 +190,19 @@ fn next_token_inner(c: char, ptr: &mut Ptr) -> SyntaxKind {
 }
 
 fn scan_ident(c: char, ptr: &mut Ptr) -> SyntaxKind {
-    let is_single_letter = match ptr.current() {
-        None => true,
-        Some(c) if !is_ident_continue(c) => true,
+    let is_raw = match (c, ptr.current()) {
+        ('r', Some('#')) => {
+            ptr.bump();
+            true
+        }
+        ('_', Some(c)) if !is_ident_continue(c) => return UNDERSCORE,
         _ => false,
     };
-    if is_single_letter {
-        return if c == '_' { UNDERSCORE } else { IDENT };
-    }
     ptr.bump_while(is_ident_continue);
-    if let Some(kind) = SyntaxKind::from_keyword(ptr.current_token_text()) {
-        return kind;
+    if !is_raw {
+        if let Some(kind) = SyntaxKind::from_keyword(ptr.current_token_text()) {
+            return kind;
+        }
     }
     IDENT
 }
diff --git a/crates/ra_syntax/src/lexer/strings.rs b/crates/ra_syntax/src/lexer/strings.rs
index 0865b7f3b..5c1cf3e9c 100644
--- a/crates/ra_syntax/src/lexer/strings.rs
+++ b/crates/ra_syntax/src/lexer/strings.rs
@@ -5,7 +5,8 @@ use crate::lexer::ptr::Ptr;
 pub(crate) fn is_string_literal_start(c: char, c1: Option<char>, c2: Option<char>) -> bool {
     match (c, c1, c2) {
         ('r', Some('"'), _)
-        | ('r', Some('#'), _)
+        | ('r', Some('#'), Some('"'))
+        | ('r', Some('#'), Some('#'))
         | ('b', Some('"'), _)
         | ('b', Some('\''), _)
         | ('b', Some('r'), Some('"'))
diff --git a/crates/ra_syntax/tests/data/lexer/0016_raw_ident.rs b/crates/ra_syntax/tests/data/lexer/0016_raw_ident.rs
new file mode 100644
index 000000000..b40a1b6a2
--- /dev/null
+++ b/crates/ra_syntax/tests/data/lexer/0016_raw_ident.rs
@@ -0,0 +1 @@
+r#raw_ident
diff --git a/crates/ra_syntax/tests/data/lexer/0016_raw_ident.txt b/crates/ra_syntax/tests/data/lexer/0016_raw_ident.txt
new file mode 100644
index 000000000..484689693
--- /dev/null
+++ b/crates/ra_syntax/tests/data/lexer/0016_raw_ident.txt
@@ -0,0 +1,2 @@
+IDENT 11 "r#raw_ident"
+WHITESPACE 1 "\n"
diff --git a/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.rs b/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.rs
new file mode 100644
index 000000000..8380d1e79
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.rs
@@ -0,0 +1,2 @@
+fn r#foo() {
+}
diff --git a/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.txt b/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.txt
new file mode 100644
index 000000000..dcd055d86
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0039_raw_fn_item.txt
@@ -0,0 +1,15 @@
+SOURCE_FILE@[0; 15)
+  FN_DEF@[0; 14)
+    FN_KW@[0; 2)
+    WHITESPACE@[2; 3)
+    NAME@[3; 8)
+      IDENT@[3; 8) "r#foo"
+    PARAM_LIST@[8; 10)
+      L_PAREN@[8; 9)
+      R_PAREN@[9; 10)
+    WHITESPACE@[10; 11)
+    BLOCK@[11; 14)
+      L_CURLY@[11; 12)
+      WHITESPACE@[12; 13)
+      R_CURLY@[13; 14)
+  WHITESPACE@[14; 15)
diff --git a/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.rs b/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.rs
new file mode 100644
index 000000000..098a60a72
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.rs
@@ -0,0 +1,3 @@
+struct S {
+    r#foo: u32
+}
\ No newline at end of file
diff --git a/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.txt b/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.txt
new file mode 100644
index 000000000..361e53152
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0040_raw_struct_item_field.txt
@@ -0,0 +1,22 @@
+SOURCE_FILE@[0; 27)
+  STRUCT_DEF@[0; 27)
+    STRUCT_KW@[0; 6)
+    WHITESPACE@[6; 7)
+    NAME@[7; 8)
+      IDENT@[7; 8) "S"
+    WHITESPACE@[8; 9)
+    NAMED_FIELD_DEF_LIST@[9; 27)
+      L_CURLY@[9; 10)
+      WHITESPACE@[10; 15)
+      NAMED_FIELD_DEF@[15; 25)
+        NAME@[15; 20)
+          IDENT@[15; 20) "r#foo"
+        COLON@[20; 21)
+        WHITESPACE@[21; 22)
+        PATH_TYPE@[22; 25)
+          PATH@[22; 25)
+            PATH_SEGMENT@[22; 25)
+              NAME_REF@[22; 25)
+                IDENT@[22; 25) "u32"
+      WHITESPACE@[25; 26)
+      R_CURLY@[26; 27)
diff --git a/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.rs b/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.rs
new file mode 100644
index 000000000..d59a6d347
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.rs
@@ -0,0 +1 @@
+fn foo() { let r#struct = 92; let r#trait = r#struct * 2; }
\ No newline at end of file
diff --git a/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.txt b/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.txt
new file mode 100644
index 000000000..f03ed17f5
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/ok/0041_raw_keywords.txt
@@ -0,0 +1,49 @@
+SOURCE_FILE@[0; 59)
+  FN_DEF@[0; 59)
+    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; 59)
+      L_CURLY@[9; 10)
+      WHITESPACE@[10; 11)
+      LET_STMT@[11; 29)
+        LET_KW@[11; 14)
+        WHITESPACE@[14; 15)
+        BIND_PAT@[15; 23)
+          NAME@[15; 23)
+            IDENT@[15; 23) "r#struct"
+        WHITESPACE@[23; 24)
+        EQ@[24; 25)
+        WHITESPACE@[25; 26)
+        LITERAL@[26; 28)
+          INT_NUMBER@[26; 28) "92"
+        SEMI@[28; 29)
+      WHITESPACE@[29; 30)
+      LET_STMT@[30; 57)
+        LET_KW@[30; 33)
+        WHITESPACE@[33; 34)
+        BIND_PAT@[34; 41)
+          NAME@[34; 41)
+            IDENT@[34; 41) "r#trait"
+        WHITESPACE@[41; 42)
+        EQ@[42; 43)
+        WHITESPACE@[43; 44)
+        BIN_EXPR@[44; 56)
+          PATH_EXPR@[44; 52)
+            PATH@[44; 52)
+              PATH_SEGMENT@[44; 52)
+                NAME_REF@[44; 52)
+                  IDENT@[44; 52) "r#struct"
+          WHITESPACE@[52; 53)
+          STAR@[53; 54)
+          WHITESPACE@[54; 55)
+          LITERAL@[55; 56)
+            INT_NUMBER@[55; 56) "2"
+        SEMI@[56; 57)
+      WHITESPACE@[57; 58)
+      R_CURLY@[58; 59)