New syntax that's easier to parse, parsing doesn't need variable lookup

test.cc

@@ -1,26 +1,26 @@
 #if 0
 
-OS_Memory:struct{
+OS_Memory::struct{
   data: void*;
   commit: SizeU;
   reserve: SizeU;
 }
 
-Arena:struct{
+Arena::struct{
   @using memory: OS_Memory;
   len: U64;
   alignment: U64;
 }
 
-String:struct{
+String::struct{
   str: U8*;
   len: S64;
 }
-Intern_String:typedef String;
+Intern_String::typedef String;
 
 @stringify
 @prefix="TK_"
-Token_Kind:enum{
+Token_Kind::enum{
   @str="End of stream" End,
   @str="*" Mul,
   @str="/" Div,
@@ -86,25 +86,25 @@ Token_Kind:enum{
   Keyword,
 }
 
-Token:struct{
+Token::struct{
   kind:Token_Kind;
   @using string:String;
-  union:{
-    int_val:S64;
-    error_val:String;
-    intern_val:Intern_String;
-  }
+  val: union{
+    integer:S64;
+    error:String;
+    intern:Intern_String;
+  };
   file:String;
   line:S64;
   line_begin:U8*;
 }
 
-Tokens:struct{
+Tokens::struct{
   @array tokens: Token*;
   iter  : S64;
 }
 
-Lex_Stream:struct{
+Lex_Stream::struct{
   stream:     U8*;
   line_begin: U8*;
   filename:   String;
@@ -112,7 +112,7 @@ Lex_Stream:struct{
 }
 
 @prefix="EK_"
-Expr_Kind: enum{
+Expr_Kind::enum{
   None,
   Atom,
   Unary, 
@@ -124,46 +124,44 @@ Expr_Kind: enum{
   Index,
 }
 
-/* 
-Expr: struct{
+Expr:: struct{
   kind: Expr_Kind;
   token: Token*;
   next : Expr*;
-  union:{
-    cast: struct{
+  _: union{
+    cast_val: struct{
       type: AST_Node*;
       expr: Expr*;
-    }
+    };
     list: struct{
       first: Expr *;
       last: Expr *;
-    }
+    };
     call: struct{
       atom: Expr *;
       list: Expr *;
-    }
+    };
     index: struct{
       atom: Expr *;
       index: Expr *;
-    }
+    };
     unary: struct{
       expr: Expr* ;
-    }
+    };
     binary: struct{
       left: Expr* ;
       right: Expr* ;
-    }
+    };
     ternary: struct{
       cond: Expr* ;
       on_true: Expr*;
       on_false: Expr*;
-    }
-  }
+    };
+  };
 }
- */
 
 @prefix="AK_"
-AST_Kind:enum{
+AST_Kind::enum{
   None,
   BaseType,
   Typedef,
@@ -179,7 +177,7 @@ AST_Kind:enum{
   EnumChild,
 }
 
-AST_Node:struct{
+AST_Node::struct{
   kind: AST_Kind;
   pos : Token*;
   name: Intern_String;
@@ -192,28 +190,28 @@ AST_Node:struct{
   
   first_child: AST_Node*;
   last_child: AST_Node*;
-  union:{
+  _:union{
     base_type_size: SizeU;
     pointer: AST_Node*;
     typedef_type: AST_Node*;
     variable_type: AST_Node*;
     func_return_type: AST_Node*;
-  }
+  };
 }
 
-Parser_Error: struct{
+Parser_Error :: struct{
   next: Parser_Error*;
   message: String;
   token  : Token *;
 }
 
-Scope: struct{
+Scope :: struct{
   next : Scope*;
   first: AST_Node*;
   last : AST_Node*;
 }
 
-Parser: struct{
+Parser :: struct{
   main_arena: Arena;
   intern_table_arena: Arena;
   symbol_table_arena: Arena;