%{
#include <stdio.h>
#include "symbolMgt.h"
extern int yylex(void);
extern void yyerror(char const *);
void printValue(char *val)
{
	fprintf(stderr, "%s", val);			
}

%}
%union{
char *stringVal;
}
%error-verbose

%token            '(' ')' ',' ';' '.' '='
%token NEW TREENODE_TYPE JTREE_TYPE ADDOBJECT
%token <stringVal> STRINGVALUE SYMBOL 


%%

Program: InstructionList
			{ 
        		fprintf( stderr, "\n----- Symbol table:\n"); 
        		printSymbolTable();
				fprintf( stderr, "-----\n" );
            }
	   ;
	
InstructionList   :   Instruction
			| InstructionList Instruction
             ;

Instruction :	NodeDef
            |   TreeDef
            |   NodeAdd
            ;

NodeDef     :   TREENODE_TYPE  SYMBOL  '='  NEW  TREENODE_TYPE '(' STRINGVALUE ')'  ';'
                  { 
                    int  p =  isInSymbolTable( $2 );
                    if( p == 1 ) {
                      fprintf( stderr, "%s already defined\n", $2 );
                    } 
                    else {
                      insertInSymbolTable( $2 , TREE_NODE);
                    }
                  }
            ;

TreeDef     :   JTREE_TYPE  SYMBOL  '='  NEW  JTREE_TYPE '(' SYMBOL ')' ';'
                  { 
					int p;
                    p =  isInSymbolTable( $2 );
                    if( p == 1 ) {
                      fprintf( stderr, "%s already defined\n", $2 );
                    }
					else {
					  insertInSymbolTable( $2 , TREE_STRUCT);
					}

                    p =  isInSymbolTable( $7 );
                    if( p == 0 ) {
                      fprintf( stderr, "%s referenced but undefined\n", $7 );
                    }
                  }
            ;

NodeAdd   :   SYMBOL '.' ADDOBJECT '(' SYMBOL ',' SYMBOL ')' ';'
                { 
					int p;
	                fprintf( stderr, " <NodeAdd %s.addObj(%s,%s)>: ",$1,$5,$7);
	                p =  isInSymbolTable( $1 );
	                if( p == 0 ) {
	                  fprintf( stderr, "%s (tree) referenced but undefined\n", $1 );
	                }
	                p =  isInSymbolTable( $5 );
	                if( p == 0 ) {
	                  fprintf( stderr, "%s (node) referenced but undefined\n", $5 );
	                }
	                p =  isInSymbolTable( $7 );
	                if( p == 0 ) {
	                  fprintf( stderr, "%s (node) referenced but undefined\n", $7 );
	                }
	              }
	        ;