parser.cup

package cup.example;

import java_cup.runtime.*;
import cup.example.Lexer;
import java.io.IOException;
import java.io.File;
import java.io.FileInputStream;
import ast.*;
import gui.Main;
import Model.Color;
import Model.Direction;

  
parser code {: 
	protected Lexer lexer;
	ast.Runtime rt = Main.runtime;
:}

init with {: 
	ComplexSymbolFactory f = new ComplexSymbolFactory(); 
	symbolFactory = f;
	File file = new File("input.txt");  
	FileInputStream fis = null;
	try {
		fis = new FileInputStream(file);
	} catch (IOException e) {
		e.printStackTrace();
	}
	lexer = new Lexer(f,fis); 
:};

scan with {: return lexer.next_token(); :};

terminal IF, WHILE , THEN , ELSE ,BAJARP, SUBIRP , COLORP, DIRP , DO;
terminal AVAZ , TABCOL , BORDE , PLUMADIR , PLUMACOL, PLUMAUP, PLUMADOWN ,AND, OR;
terminal NOT, SEMI, BRACKETL, BRACKETR;
terminal N;
		
terminal Color c;
terminal Direction d;
terminal Integer num;

non terminal Statement op;
non terminal Expression expr;
non terminal Expression program;

precedence left SEMI;
precedence left AND;
precedence left OR;

start with program;

op 	::= 	BAJARP {: RESULT = new BajarPluma(); ;:}
			| SUBIRP {: RESULT = new SubirPluma();;:}
			| COLORP c:c1 {:RESULT = new CambiarColor(c1);;:} 
			| COLORP N {:RESULT = new CambiarColor(Color.BLACK);;:} 
			| DIRP d:d1 {: RESULT = new CambiarDireccion(d1);;:}
			| DIRP N {:RESULT = new CambiarDireccion(Direction.NORTH);;:}
			| AVAZ num:num1 {:RESULT =  new Avanzar(num1);;:}
			| IF expr:e1 THEN BRACKETL op:o1 BRACKETR {:RESULT = new If(e1,o1);;:}
			| IF expr:e1 THEN BRACKETL op:o1 BRACKETR ELSE BRACKETL op:o2 BRACKETR {:RESULT = new IfElse(e1,o1,o2);;:}
			| WHILE expr:e1 DO BRACKETL op:o1 BRACKETR {: RESULT = new While(e1, o1); ;:}
			| op:o1 SEMI op:o2 {:RESULT = new StatementPair(o1,o2);;:}
			;

expr ::= 	TABCOL c:c1 {:RESULT = new TableroCol(c1);:}
			| TABCOL N {:RESULT = new TableroCol(Color.BLACK);:}
			| BORDE	{:RESULT = new Borde();:}
			| PLUMADIR d:d1 {:RESULT = new PlumaDir(d1);:}
			| PLUMADIR N {:RESULT = new PlumaDir(Direction.NORTH);:}
			| PLUMACOL c:c1 {:RESULT = new PlumaCol(c1);:}
			| PLUMACOL N {:RESULT = new PlumaCol(Color.BLACK);:}
			| PLUMAUP {:RESULT = new PlumaUp();:}
			| PLUMADOWN {:RESULT = new PlumaDown();:}
			| expr:e1 AND expr:e2 {:RESULT = new And(e1,e2);:}
			| expr:e1 OR expr:e2 {:RESULT = new Or(e1,e2);:}
			| NOT expr:e1 {:RESULT = new Not(e1);:}
			;

program ::= op:o1 {:o1.exec(rt);System.out.println(rt.tablero.toString());:};