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);
}
}
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;
}
