added initial block rules

grammar.y

@@ -53,5 +53,12 @@
 %token RELEASE 614
 %token COMMENT 700
 %%
+B : '{' E '}'; //Braced Expressions can have braces removed to get regular expressions
+D : '[' l ']'; //Declaration Lists Brackets can be taken out to get a list of Declarations
+E : Maybe_D U; //An expression can start with an optional D followed by an undeclared segment
+Maybe_D : D
+	| ; //Either D or not
+l : A ';' l;
+  | ;  //a declaration list can either be empty or be an assignment followed by a semi-colon and another list
 
 %%