#pragma once
typedef struct Expr Expr;
typedef struct Scope Scope;
typedef struct AST_Node AST_Node;
typedef struct Parser_Error Parser_Error;

struct Parser_Error{
  Parser_Error *next;
  String message;
  Token *token;
};

struct Scope{
  Scope *next;
  AST_Node *first;
  AST_Node *last;
};

typedef struct Parser{
  Arena main_arena;
  Arena intern_table_arena;
  Arena symbol_table_arena;
  
  Scope *scope_free_list;
  Scope *scope_stack;
  Scope *global_scope;
  
  S64 symbols_inserted;
  AST_Node *symbols;
  S64 symbols_count;
  
  S64 interns_in_bytes;
  S64 interns_inserted;
  Intern_String *interns;
  S64 interns_count;
  
  U8 *first_keyword;
  U8 *last_keyword;
  
  Parser_Error *first_error;
  Parser_Error *last_error;
  
  Tokens tokens;
}Parser;

function Intern_String intern_string(Parser *p, String string);
function Token *token_get(Parser *p);
function B32 intern_compare(Intern_String a, Intern_String b);
function void parser_push_scope(Parser *p);
function AST_Node *symbol_register_basic_type(Parser *p, Intern_String string, SizeU size);