lang: massive amounts of parser and ast pain

crates/lang/src/parser/ast/lossless.rs

@@ -0,0 +1,19 @@
+use self::lex::SyntaxKind;
+
+pub mod parser;
+
+pub mod lex;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+enum Lang {}
+impl rowan::Language for Lang {
+    type Kind = SyntaxKind;
+    #[allow(unsafe_code)]
+    fn kind_from_raw(raw: rowan::SyntaxKind) -> Self::Kind {
+        assert!(raw.0 <= SyntaxKind::ROOT as u16);
+        unsafe { std::mem::transmute::<u16, SyntaxKind>(raw.0) }
+    }
+    fn kind_to_raw(kind: Self::Kind) -> rowan::SyntaxKind {
+        kind.into()
+    }
+}