/****************************  Listing 2  ****************************/
/*******                                                       *******/
/*******   Delete all of the current actions in the grammar    *******/
/*******   rules section of yref2.y. All have the general      *******/
/*******   form: { printf(......) }. Then add the actions      *******/
/*******   as shown below (from { to }, inclusive). Note       *******/
/*******   that there are no changes to the grammar rules,     *******/
/*******   which are only repeated for setting the context.    *******/
/*******                                                       *******/
/*********************************************************************/

direct_declarator:
           IDENTIFIER
                {  yn_decl = 1; root = addtree(root, $1); }
         | '(' declarator ')'
         | direct_declarator '[' ']'  %prec '*'
         | direct_declarator '[' constant ']' %prec '*' /* Variant */
         | direct_declarator '(' parameter_type_list ')' %prec '*'
         | direct_declarator '(' ')' %prec '*'
         | direct_declarator '(' identifier_list ')' %prec '*'
         ;

identifier_list:
           IDENTIFIER
                {  yn_decl = 0; root = addtree(root, $1); }
         | identifier_list ',' IDENTIFIER
                {  yn_decl = 0; root = addtree(root, $3); }
         ;

statement:
           compound_statement
         | expression ';'
         | KEYWORD '(' expression ')' statement
         | KEYWORD for_construct statement
         | KEYWORD statement
         | KEYWORD constant ':' statement
         | KEYWORD ':' statement
         | KEYWORD IDENTIFIER ';'
                {  yn_decl = 0; root = addtree(root, $2);  }
         | IDENTIFIER ':' statement
                {  yn_decl = 0; root = addtree(root, $1);  }
         | ';'
         ;

primary_expression:
           IDENTIFIER
                {  yn_decl = 0; root = addtree(root, $1); }
         | constant
         | STRING
         | '(' expression ')'
         | primary_expression '(' ')'
         | primary_expression '(' expression ')'
         | primary_expression '[' expression ']'
         | primary_expression '.' IDENTIFIER 
                {  yn_decl = 0; root = addtree(root, $3); }
         ;