Using arena as token array, remove arenas idea

core_compiler_interface.hpp

@@ -648,5 +648,51 @@ struct Core_Message {
   Core_Context *core_create_context(Allocator *allocator);
   Array<Token> core_lex_string(Core_Context *ctx, char *string, size_t size);
 
+  AST Modification API
+  AST Query API
+
+  Tree walk interpreter / Bytecode interpreter
+  C code generation backend
+  
+  Control of compilation with many hooks
+  Ast tags
+
+  * Accessing and modifying the AST
+  * Using as a scripting language
+    * Tree walk interp or Bytecode
+  * Using as a compiler
+    * C code backend
+    * C++ code backend ? 
+  * Hooking into raw strings to preprocess
+  * Hooking into tokens to preprocess
+  * Hooking into AST to manipulate
+  * Hooking into Parsing to add syntax sugar
+  * Hooking into Parsing and typechecking to add language features
+  * Hooking into typechecking to add for example builtin functions
+  * Creating a custom code generation backend
+  * Performing compilation passes multiple times to get some sort of effect
+  * Accessing the typechecked AST and modifying it then typechecking modifications ??
+  * Tagging syntax for creating language features
+
+  Possible use cases:
+    I want to use it as a scripting language for my game
+      It should be able to not leak memory while rerunning scripts contnously
+      It should allow me to constrain certain features (pointer arithmetic)
+      It should allow me to add possible functions
+    I want to use this as a code generation tool 
+      I should be able to access and modify the AST
+      I should be able to access the tokens for pre processing
+      I should be able to add my own syntax
+      I should be albe to add my own features
+      I should be able to create or modify a code generating back end
+    
+      
+      
+    Code generation
+    Making DSLs
+    
+    
+    
+    
 
   */