move parser to a separate crate

crates/ra_parser/src/syntax_kind.rs

@@ -0,0 +1,25 @@
+mod generated;
+
+use std::fmt;
+
+pub use self::generated::SyntaxKind;
+
+impl fmt::Debug for SyntaxKind {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let name = self.info().name;
+        f.write_str(name)
+    }
+}
+
+pub(crate) struct SyntaxInfo {
+    pub name: &'static str,
+}
+
+impl SyntaxKind {
+    pub fn is_trivia(self) -> bool {
+        match self {
+            SyntaxKind::WHITESPACE | SyntaxKind::COMMENT => true,
+            _ => false,
+        }
+    }
+}