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JavaCC is a parser/scanner generator for Java.
/* JavacodeTest.java */
/* Generated By:JavaCC: Do not edit this line. JavacodeTest.java */
/**
* A test to verify the interaction between JAVACODE
* productions and lookajead.
**/
public class JavacodeTest implements JavacodeTestConstants {
public static void main(String args[]) throws Exception {
JavacodeTest t = new JavacodeTest(System.in);
System.out.print("Answer is: ");
try {
switch (args[0].charAt(0)) {
case 'j': Javacode(); break;
case 'n': NoJavacode(); break;
case 'i': IndirectJavacode(); break;
case 'I': IndirectJavacode2(); break;
case 'N': JavacodeNoLa(); break;
}
} catch (Exception e) {
System.out.println("Oops.");
System.out.println(e.getMessage());
throw(e);
}
System.out.println(".");
}
public static boolean isC() {
return getToken(1).image.equals("C");
}
static final public void Javacode() throws ParseException {
label_1:
while (true) {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:
case C:
case D:{
;
break;
}
default:
jj_la1[0] = jj_gen;
break label_1;
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[1] = jj_gen;
if (jj_2_1(2147483647)) {
javacode_method();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case D:{
D();
break;
}
default:
jj_la1[2] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
}
}
jj_consume_token(0);
}
static final public void JavacodeNoLa() throws ParseException {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[3] = jj_gen;
javacode_method();
}
jj_consume_token(0);
}
/*
* Similar non-javacode constructs are allowed. This checks a pointless
* (but legal) case.
*/
static final public void NoJavacode() throws ParseException {
label_2:
while (true) {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:
case B:
case D:{
;
break;
}
default:
jj_la1[4] = jj_gen;
break label_2;
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[5] = jj_gen;
if (jj_2_2(2147483647)) {
B();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case D:{
D();
break;
}
default:
jj_la1[6] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
}
}
jj_consume_token(0);
}
/*
* For sematic lookahead, the LA executes as expected (only
* succeeds if both the semantic and normal LA succeeds).
*/
static final public
void Semantic() throws ParseException {
label_3:
while (true) {
if (jj_2_3(1)) {
;
} else {
break label_3;
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[7] = jj_gen;
if (isC()) {
B();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case D:{
D();
break;
}
default:
jj_la1[8] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
}
}
jj_consume_token(0);
}
static final public void IndirectJavacode() throws ParseException {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[9] = jj_gen;
Ind();
}
jj_consume_token(0);
}
static final public void IndirectJavacode2() throws ParseException {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case A:{
A();
break;
}
default:
jj_la1[10] = jj_gen;
if (jj_2_4(2147483647)) {
Ind();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case B:{
B();
break;
}
default:
jj_la1[11] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
}
jj_consume_token(0);
}
static final public void Ind() throws ParseException {
javacode_method();
}
static final public void A() throws ParseException {
jj_consume_token(A);
System.out.print("A");
}
static final public void B() throws ParseException {
jj_consume_token(B);
System.out.print("B");
}
static final public void C() throws ParseException {
jj_consume_token(C);
System.out.print("C");
}
static final public void D() throws ParseException {
jj_consume_token(D);
System.out.print("D");
}
static void javacode_method() throws ParseException {Token t = getNextToken();
System.out.print("javacode " + t.image);
}
static private boolean jj_2_1(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return (!jj_3_1()); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(0, xla); }
}
static private boolean jj_2_2(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return (!jj_3_2()); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(1, xla); }
}
static private boolean jj_2_3(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return (!jj_3_3()); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(2, xla); }
}
static private boolean jj_2_4(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return (!jj_3_4()); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(3, xla); }
}
static private boolean jj_3R_8()
{
if (jj_scan_token(B)) return true;
return false;
}
static private boolean jj_3_3()
{
Token xsp;
xsp = jj_scanpos;
if (jj_3R_4()) {
jj_scanpos = xsp;
jj_lookingAhead = true;
jj_semLA = isC();
jj_lookingAhead = false;
if (!jj_semLA || jj_3R_5()) {
jj_scanpos = xsp;
if (jj_3R_6()) return true;
}
}
return false;
}
static private boolean jj_3R_4()
{
if (jj_3R_7()) return true;
return false;
}
static private boolean jj_3R_7()
{
if (jj_scan_token(A)) return true;
return false;
}
static private boolean jj_3_1()
{
if (jj_scan_token(C)) return true;
return false;
}
static private boolean jj_3R_9()
{
if (jj_scan_token(D)) return true;
return false;
}
static private boolean jj_3R_6()
{
if (jj_3R_9()) return true;
return false;
}
static private boolean jj_3_2()
{
if (jj_scan_token(C)) return true;
return false;
}
static private boolean jj_3R_5()
{
if (jj_3R_8()) return true;
return false;
}
static private boolean jj_3_4()
{
if (jj_scan_token(5)) return true;
return false;
}
static private boolean jj_initialized_once = false;
/** Generated Token Manager. */
static public JavacodeTestTokenManager token_source;
static SimpleCharStream jj_input_stream;
/** Current token. */
static public Token token;
/** Next token. */
static public Token jj_nt;
static private int jj_ntk;
static private Token jj_scanpos, jj_lastpos;
static private int jj_la;
/** Whether we are looking ahead. */
static private boolean jj_lookingAhead = false;
static private boolean jj_semLA;
static private int jj_gen;
static final private int[] jj_la1 = new int[12];
static private int[] jj_la1_0;
static {
jj_la1_init_0();
}
private static void jj_la1_init_0() {
jj_la1_0 = new int[] {0x1a,0x2,0x10,0x2,0x16,0x2,0x10,0x2,0x10,0x2,0x2,0x4,};
}
static final private JJCalls[] jj_2_rtns = new JJCalls[4];
static private boolean jj_rescan = false;
static private int jj_gc = 0;
/** Constructor with InputStream. */
public JavacodeTest(java.io.InputStream stream) {
this(stream, null);
}
/** Constructor with InputStream and supplied encoding */
public JavacodeTest(java.io.InputStream stream, String encoding) {
if (jj_initialized_once) {
System.out.println("ERROR: Second call to constructor of static parser. ");
System.out.println(" You must either use ReInit() or set the JavaCC option STATIC to false");
System.out.println(" during parser generation.");
throw new Error();
}
jj_initialized_once = true;
try { jj_input_stream = new SimpleCharStream(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
token_source = new JavacodeTestTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Reinitialise. */
static public void ReInit(java.io.InputStream stream) {
ReInit(stream, null);
}
/** Reinitialise. */
static public void ReInit(java.io.InputStream stream, String encoding) {
try { jj_input_stream.ReInit(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Constructor. */
public JavacodeTest(java.io.Reader stream) {
if (jj_initialized_once) {
System.out.println("ERROR: Second call to constructor of static parser. ");
System.out.println(" You must either use ReInit() or set the JavaCC option STATIC to false");
System.out.println(" during parser generation.");
throw new Error();
}
jj_initialized_once = true;
jj_input_stream = new SimpleCharStream(stream, 1, 1);
token_source = new JavacodeTestTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Reinitialise. */
static public void ReInit(java.io.Reader stream) {
if (jj_input_stream == null) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
} else {
jj_input_stream.ReInit(stream, 1, 1);
}
if (token_source == null) {
token_source = new JavacodeTestTokenManager(jj_input_stream);
}
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Constructor with generated Token Manager. */
public JavacodeTest(JavacodeTestTokenManager tm) {
if (jj_initialized_once) {
System.out.println("ERROR: Second call to constructor of static parser. ");
System.out.println(" You must either use ReInit() or set the JavaCC option STATIC to false");
System.out.println(" during parser generation.");
throw new Error();
}
jj_initialized_once = true;
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Reinitialise. */
public void ReInit(JavacodeTestTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 12; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
static private Token jj_consume_token(int kind) throws ParseException {
Token oldToken;
if ((oldToken = token).next != null) token = token.next;
else token = token.next = token_source.getNextToken();
jj_ntk = -1;
if (token.kind == kind) {
jj_gen++;
if (++jj_gc > 100) {
jj_gc = 0;
for (int i = 0; i < jj_2_rtns.length; i++) {
JJCalls c = jj_2_rtns[i];
while (c != null) {
if (c.gen < jj_gen) c.first = null;
c = c.next;
}
}
}
return token;
}
token = oldToken;
jj_kind = kind;
throw generateParseException();
}
@SuppressWarnings("serial")
static private final class LookaheadSuccess extends java.lang.Error { }
static final private LookaheadSuccess jj_ls = new LookaheadSuccess();
static private boolean jj_scan_token(int kind) {
if (jj_scanpos == jj_lastpos) {
jj_la--;
if (jj_scanpos.next == null) {
jj_lastpos = jj_scanpos = jj_scanpos.next = token_source.getNextToken();
} else {
jj_lastpos = jj_scanpos = jj_scanpos.next;
}
} else {
jj_scanpos = jj_scanpos.next;
}
if (jj_rescan) {
int i = 0; Token tok = token;
while (tok != null && tok != jj_scanpos) { i++; tok = tok.next; }
if (tok != null) jj_add_error_token(kind, i);
}
if (jj_scanpos.kind != kind) return true;
if (jj_la == 0 && jj_scanpos == jj_lastpos) throw jj_ls;
return false;
}
/** Get the next Token. */
static final public Token getNextToken() {
if (token.next != null) token = token.next;
else token = token.next = token_source.getNextToken();
jj_ntk = -1;
jj_gen++;
return token;
}
/** Get the specific Token. */
static final public Token getToken(int index) {
Token t = jj_lookingAhead ? jj_scanpos : token;
for (int i = 0; i < index; i++) {
if (t.next != null) t = t.next;
else t = t.next = token_source.getNextToken();
}
return t;
}
static private int jj_ntk_f() {
if ((jj_nt=token.next) == null)
return (jj_ntk = (token.next=token_source.getNextToken()).kind);
else
return (jj_ntk = jj_nt.kind);
}
static private java.util.List jj_expentries = new java.util.ArrayList();
static private int[] jj_expentry;
static private int jj_kind = -1;
static private int[] jj_lasttokens = new int[100];
static private int jj_endpos;
static private void jj_add_error_token(int kind, int pos) {
if (pos >= 100) {
return;
}
if (pos == jj_endpos + 1) {
jj_lasttokens[jj_endpos++] = kind;
} else if (jj_endpos != 0) {
jj_expentry = new int[jj_endpos];
for (int i = 0; i < jj_endpos; i++) {
jj_expentry[i] = jj_lasttokens[i];
}
for (int[] oldentry : jj_expentries) {
if (oldentry.length == jj_expentry.length) {
boolean isMatched = true;
for (int i = 0; i < jj_expentry.length; i++) {
if (oldentry[i] != jj_expentry[i]) {
isMatched = false;
break;
}
}
if (isMatched) {
jj_expentries.add(jj_expentry);
break;
}
}
}
if (pos != 0) {
jj_lasttokens[(jj_endpos = pos) - 1] = kind;
}
}
}
/** Generate ParseException. */
static public ParseException generateParseException() {
jj_expentries.clear();
boolean[] la1tokens = new boolean[6];
if (jj_kind >= 0) {
la1tokens[jj_kind] = true;
jj_kind = -1;
}
for (int i = 0; i < 12; i++) {
if (jj_la1[i] == jj_gen) {
for (int j = 0; j < 32; j++) {
if ((jj_la1_0[i] & (1< jj_gen) {
jj_la = p.arg; jj_lastpos = jj_scanpos = p.first;
switch (i) {
case 0: jj_3_1(); break;
case 1: jj_3_2(); break;
case 2: jj_3_3(); break;
case 3: jj_3_4(); break;
}
}
p = p.next;
} while (p != null);
} catch(LookaheadSuccess ls) { }
}
jj_rescan = false;
}
static private void jj_save(int index, int xla) {
JJCalls p = jj_2_rtns[index];
while (p.gen > jj_gen) {
if (p.next == null) { p = p.next = new JJCalls(); break; }
p = p.next;
}
p.gen = jj_gen + xla - jj_la;
p.first = token;
p.arg = xla;
}
static final class JJCalls {
int gen;
Token first;
int arg;
JJCalls next;
}
}