public static void main(String args[]) {
try {
System.out.println("Type in a tiny exp folowed by one or two Ctrl-d's:");
Parser p = new Parser(new Lexer(new PushbackReader(new InputStreamReader(System.in), 1024)));
Start tree = p.parse();
NewEval.replaceUminus(tree);
/* pretty-print */
System.out.println("\nThe result of evaluating:");
PrettyPrinter.print(tree);
/* pre-eval to replace uminus */
/* evaluate */
System.out.print("\nis: ");
PrettyPrinter.print(Evaluator.eval(tree));
System.out.println("\n");
} catch (Exception e) {
System.out.println(e);
}
}
public void prettyPrint() {
try {
// clear old problem messages
problemsView.setText("");
// update status view
statusView.setText(" Parsing ...");
LispExpr root = Parser.parse(textView.getText());
statusView.setText(" Pretty Printing ...");
String newText = PrettyPrinter.prettyPrint(root);
textView.setText(newText);
statusView.setText(" Done.");
} catch (Error e) {
System.err.println(e.getMessage());
statusView.setText(" Errors.");
}
}
/**
* Run the pass <code>pass</code> on the job. Before running the pass on the job, if the job is a
* <code>SourceJob</code>, then this method will ensure that the scheduling invariants are
* enforced by calling <code>enforceInvariants</code>.
*/
protected void runPass(Job job, Pass pass) throws CyclicDependencyException {
// make sure that all scheduling invariants are satisfied before running
// the next pass. We may thus execute some other passes on other
// jobs running the given pass.
try {
enforceInvariants(job, pass);
} catch (CyclicDependencyException e) {
// A job that depends on this job is still running
// an earlier pass. We cannot continue this pass,
// but we can just silently fail since the job we're
// that depends on this one will eventually try
// to run this pass again when it reaches a barrier.
return;
}
if (getOptions().disable_passes.contains(pass.name())) {
if (Report.should_report(Report.frontend, 1)) Report.report(1, "Skipping pass " + pass);
job.finishPass(pass, true);
return;
}
if (Report.should_report(Report.frontend, 1))
Report.report(1, "Trying to run pass " + pass + " in " + job);
if (job.isRunning()) {
// We're currently running. We can't reach the goal.
throw new CyclicDependencyException(job + " cannot reach pass " + pass);
}
pass.resetTimers();
boolean result = false;
if (job.status()) {
Job oldCurrentJob = this.currentJob;
this.currentJob = job;
Report.should_report.push(pass.name());
// Stop the timer on the old pass. */
Pass oldPass = oldCurrentJob != null ? oldCurrentJob.runningPass() : null;
if (oldPass != null) {
oldPass.toggleTimers(true);
}
job.setRunningPass(pass);
pass.toggleTimers(false);
result = pass.run();
pass.toggleTimers(false);
job.setRunningPass(null);
Report.should_report.pop();
this.currentJob = oldCurrentJob;
// Restart the timer on the old pass. */
if (oldPass != null) {
oldPass.toggleTimers(true);
}
// pretty-print this pass if we need to.
if (getOptions().print_ast.contains(pass.name())) {
System.err.println("--------------------------------" + "--------------------------------");
System.err.println("Pretty-printing AST for " + job + " after " + pass.name());
PrettyPrinter pp = new PrettyPrinter();
pp.printAst(job.ast(), new CodeWriter(System.err, 78));
}
// dump this pass if we need to.
if (getOptions().dump_ast.contains(pass.name())) {
System.err.println("--------------------------------" + "--------------------------------");
System.err.println("Dumping AST for " + job + " after " + pass.name());
NodeVisitor dumper = new DumpAst(new CodeWriter(System.err, 78));
dumper = dumper.begin();
job.ast().visit(dumper);
dumper.finish();
}
// This seems to work around a VM bug on linux with JDK
// 1.4.0. The mark-sweep collector will sometimes crash.
// Running the GC explicitly here makes the bug go away.
// If this fails, maybe run with bigger heap.
// System.gc();
}
Stats stats = getStats();
stats.accumPassTimes(pass.id(), pass.inclusiveTime(), pass.exclusiveTime());
if (Report.should_report(Report.time, 2)) {
Report.report(
2,
"Finished "
+ pass
+ " status="
+ str(result)
+ " inclusive_time="
+ pass.inclusiveTime()
+ " exclusive_time="
+ pass.exclusiveTime());
} else if (Report.should_report(Report.frontend, 1)) {
Report.report(1, "Finished " + pass + " status=" + str(result));
}
job.finishPass(pass, result);
}