/**
* Parse the grammar specification from standard input. This produces sets of terminal,
* non-terminals, and productions which can be accessed via static variables of the respective
* classes, as well as the setting of various variables (mostly in the emit class) for small user
* supplied items such as the code to scan with.
*/
protected static void parse_grammar_spec() throws java.lang.Exception {
parser parser_obj;
/* create a parser and parse with it */
parser_obj = new parser();
try {
if (opt_do_debug) parser_obj.debug_parse();
else parser_obj.parse();
} catch (Exception e) {
/* something threw an exception. catch it and emit a message so we
have a line number to work with, then re-throw it */
lexer.emit_error("Internal error: Unexpected exception");
throw e;
}
}
public static void main(String args[]) throws Exception {
Yylex l = null;
parser p;
Interpreter I;
try {
if (args.length == 0) l = new Yylex(System.in);
else l = new Yylex(new FileReader(args[0]));
} catch (FileNotFoundException e) {
System.err.println("Error: File not found: " + args[0]);
System.exit(1);
}
p = new parser(l);
/* The default parser is the first-defined entry point. */
/* You may want to change this. Other options are: */
/* */
try {
calc.Absyn.Exp parse_tree = p.pExp();
I = new Interpreter();
// I.eval(parse_tree) ;
System.out.println(I.eval(parse_tree));
/*System.out.println();
System.out.println("Parse Succesful!");
System.out.println();
System.out.println("[Abstract Syntax]");
System.out.println();
System.out.println(PrettyPrinter.show(parse_tree));
System.out.println();
System.out.println("[Linearized Tree]");
System.out.println();
System.out.println(PrettyPrinter.print(parse_tree));
*/
} catch (Throwable e) {
System.err.println(
"At line " + String.valueOf(l.line_num()) + ", near \"" + l.buff() + "\" :");
System.err.println(" " + e.getMessage());
System.exit(1);
}
}
/** Method with the actual generated action code. */
public final java_cup.runtime.Symbol CUP$parser$do_action(
int CUP$parser$act_num,
java_cup.runtime.lr_parser CUP$parser$parser,
java.util.Stack CUP$parser$stack,
int CUP$parser$top)
throws java.lang.Exception {
/* Symbol object for return from actions */
java_cup.runtime.Symbol CUP$parser$result;
/* select the action based on the action number */
switch (CUP$parser$act_num) {
/*. . . . . . . . . . . . . . . . . . . .*/
case 14: // expresion ::= LPARENT expresion RPARENT
{
Integer RESULT = null;
int EXWleft =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).left;
int EXWright =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).right;
Integer EXW =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).value;
RESULT = new Integer(EXW.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 13: // expresion ::= RESTA expresion
{
Integer RESULT = null;
int EPX1left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int EPX1right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer EPX1 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(EPX1 * (-1));
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 12: // expresion ::= expresion POTENCIA expresion
{
Integer RESULT = null;
int ED1left =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int ED1right =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer ED1 =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
int ED2left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int ED2right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer ED2 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer((int) Math.pow(ED1.intValue(), ED2.intValue()));
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 11: // expresion ::= expresion DIVISION expresion
{
Integer RESULT = null;
int EC1left =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int EC1right =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer EC1 =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
int EC2left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int EC2right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer EC2 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(EC1.intValue() / EC2.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 10: // expresion ::= expresion MULTIPLICACION expresion
{
Integer RESULT = null;
int EA1left =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int EA1right =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer EA1 =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
int EA2left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int EA2right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer EA2 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(EA1.intValue() * EA2.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 9: // expresion ::= expresion RESTA expresion
{
Integer RESULT = null;
int EE1left =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int EE1right =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer EE1 =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
int EE2left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int EE2right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer EE2 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(EE1.intValue() - EE2.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 8: // expresion ::= expresion SUMA expresion
{
Integer RESULT = null;
int E1left =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int E1right =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer E1 =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
int E2left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int E2right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer E2 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(E1.intValue() + E2.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 7: // expresion ::= ENTERO
{
Integer RESULT = null;
int D1left = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int D1right = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer D1 = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
RESULT = new Integer(D1.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"expresion",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 6: // ecuacion ::= error NT$1 RESULTADO
{
Object RESULT = null;
// propagate RESULT from NT$1
RESULT =
(Object)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).value;
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"ecuacion",
2,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 5: // NT$1 ::=
{
Object RESULT = null;
System.out.println("Aprenda a escribir br..");
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"NT$1",
4,
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 4: // ecuacion ::= expresion NT$0 RESULTADO
{
Object RESULT = null;
// propagate RESULT from NT$0
RESULT =
(Object)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).value;
int EQleft =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).left;
int EQright =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).right;
Integer EQ =
(Integer)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)).value;
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"ecuacion",
2,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 2)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 3: // NT$0 ::=
{
Object RESULT = null;
int EQleft = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).left;
int EQright = ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).right;
Integer EQ = (Integer) ((java_cup.runtime.Symbol) CUP$parser$stack.peek()).value;
System.out.println("Sintaxis OK");
System.out.println("Resultado = " + EQ.intValue());
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"NT$0",
3,
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 2: // sesion ::= ecuacion
{
Object RESULT = null;
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"sesion",
1,
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 1: // $START ::= sesion EOF
{
Object RESULT = null;
int start_valleft =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).left;
int start_valright =
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).right;
Object start_val =
(Object)
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)).value;
RESULT = start_val;
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"$START",
0,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
/* ACCEPT */
CUP$parser$parser.done_parsing();
return CUP$parser$result;
/*. . . . . . . . . . . . . . . . . . . .*/
case 0: // sesion ::= sesion ecuacion
{
Object RESULT = null;
CUP$parser$result =
parser
.getSymbolFactory()
.newSymbol(
"sesion",
1,
((java_cup.runtime.Symbol) CUP$parser$stack.elementAt(CUP$parser$top - 1)),
((java_cup.runtime.Symbol) CUP$parser$stack.peek()),
RESULT);
}
return CUP$parser$result;
/* . . . . . .*/
default:
throw new Exception("Invalid action number found in internal parse table");
}
}
public static void main(String[] args) throws IOException // may be thrown by the scanner
{
// check for command-line args
if (args.length != 2) {
System.err.println(
"please supply name of file to be parsed and name of file for unparsed version.");
System.exit(-1);
}
try {
Codegen.p = new PrintWriter("/home/ben/Scripts/github/Academic/cs 536/p6/gencode.asm");
} catch (FileNotFoundException e) {
System.err.println("File " + args[0] + " not found.");
System.exit(-1);
}
// open input file
FileReader inFile = null;
try {
inFile = new FileReader(args[0]);
} catch (FileNotFoundException ex) {
System.err.println("File " + args[0] + " not found.");
System.exit(-1);
}
// open output file
PrintWriter outFile = null;
try {
outFile = new PrintWriter(args[1]);
} catch (FileNotFoundException ex) {
System.err.println("File " + args[1] + " could not be opened for writing.");
System.exit(-1);
}
parser P = new parser(new Yylex(inFile));
Symbol root = null; // the parser will return a Symbol whose value
// field is the translation of the root
// nonterminal (i.e., of the nonterminal
// "program")
try {
root = P.parse(); // do the parse
System.out.println("Little program parsed correctly.");
} catch (Exception ex) {
System.err.println("Exception occured during parse: " + ex);
ex.printStackTrace();
System.exit(-1);
}
try {
// ((SymTabNode)root.value).provideSymTab(new SymTab());
((ProgramNode) root.value).processNames();
} catch (Exception ex) {
System.err.println("Exception occured during parse: " + ex);
ex.printStackTrace();
System.exit(-1);
}
if (!Errors.errors) {
((ASTnode) root.value).unparse(outFile, 0);
try {
((ProgramNode) root.value).typeCheck();
} catch (Exception ex) {
System.err.println("Exception occured during typecheck: " + ex);
ex.printStackTrace();
System.exit(-1);
}
}
if (!Errors.errors) {
try {
((ProgramNode) root.value).generate();
Codegen.p.close();
} catch (Exception ex) {
System.err.println("Exception occured during codegen: " + ex);
ex.printStackTrace();
System.exit(-1);
}
}
outFile.close();
return;
}
public static void main(String args[]) throws Exception {
parser analizador;
analizador = new parser(new Scanner(System.in));
analizador.parse();
}