Update REAMDE

README.rst

@@ -2,6 +2,32 @@
 A Tree-sitter parser for CMake
 ==============================
 
-This project provides a `cmake` parser. Its primary use case is to provide a `cmake` parser for `nvim-treesitter`. The
-project is still underdevelopment but basic highlighting should already work.
+This project provides a `cmake` parser. Its primary use case is to provide a `cmake` parser for `nvim-treesitter`.
 
+
+Parsed syntax
+=============
+
+- Command
+
+  - General commands
+  - For and while loops
+  - If conditions
+  - Functions and macros
+
+- Arguments
+
+  - Quoted arguments
+  - Bracket arguments
+  - Unquoted arguments
+  - Parentheses
+
+- Variable refences
+
+  - Environment and cache variables
+  - Normal variables
+
+TODO
+====
+
+- Generator expression