void Get () {
for (;;) {
t = la;
la = scanner.Scan();
if (la.kind <= maxT) { ++errDist; break; }
la = t;
}
}
// make sure that peeking starts at the current scan position
public void ResetPeek () { pt = tokens; }
// peek for the next token, ignore pragmas
public Token Peek () {
do {
if (pt.next == null) {
pt.next = NextToken();
}
pt = pt.next;
} while (pt.kind > maxT); // skip pragmas
return pt;
}
// get the next token (possibly a token already seen during peeking)
public Token Scan () {
if (tokens.next == null) {
return NextToken();
} else {
pt = tokens = tokens.next;
return tokens;
}
}
Token NextToken() {
while (ch == ' ' ||
ch >= 9 && ch <= 10 || ch == 13
) NextCh();
int recKind = noSym;
int recEnd = pos;
t = new Token();
t.pos = pos; t.col = col; t.line = line; t.charPos = charPos;
int state;
if (start.ContainsKey(ch)) { state = (int) start[ch]; }
else { state = 0; }
tlen = 0; AddCh();
switch (state) {
case -1: { t.kind = eofSym; break; } // NextCh already done
case 0: {
if (recKind != noSym) {
tlen = recEnd - t.pos;
SetScannerBehindT();
}
t.kind = recKind; break;
} // NextCh already done
case 1:
if (ch == 'n') {AddCh(); goto case 13;}
else {goto case 0;}
case 2:
if (ch == 'b') {AddCh(); goto case 13;}
else {goto case 0;}
case 3:
if (ch == 'r') {AddCh(); goto case 13;}
else {goto case 0;}
case 4:
if (ch == 'r') {AddCh(); goto case 13;}
else {goto case 0;}
case 5:
if (ch == 'i') {AddCh(); goto case 13;}
else {goto case 0;}
case 6:
if (ch == 'g') {AddCh(); goto case 13;}
else {goto case 0;}
case 7:
if (ch == 'p') {AddCh(); goto case 13;}
else {goto case 0;}
case 8:
if (ch == 'k') {AddCh(); goto case 9;}
else {goto case 0;}
case 9:
if (ch == 't') {AddCh(); goto case 13;}
else {goto case 0;}
case 10:
if (ch == 'o') {AddCh(); goto case 11;}
else {goto case 0;}
case 11:
if (ch == 'v') {AddCh(); goto case 13;}
else {goto case 0;}
case 12:
if (ch == 'z') {AddCh(); goto case 13;}
else {goto case 0;}
case 13:
{t.kind = 1; break;}
case 14:
if (ch == 'n') {AddCh(); goto case 15;}
else {goto case 0;}
case 15:
if (ch == 't') {AddCh(); goto case 16;}
else {goto case 0;}
case 16:
if (ch == 'a') {AddCh(); goto case 17;}
else {goto case 0;}
case 17:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 18:
if (ch == 'e') {AddCh(); goto case 19;}
else {goto case 0;}
case 19:
if (ch == 'n') {AddCh(); goto case 20;}
else {goto case 0;}
case 20:
if (ch == 's') {AddCh(); goto case 21;}
else {goto case 0;}
case 21:
if (ch == 't') {AddCh(); goto case 22;}
else {goto case 0;}
case 22:
if (ch == 'a') {AddCh(); goto case 23;}
else {goto case 0;}
case 23:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 24:
if (ch == 't') {AddCh(); goto case 25;}
else {goto case 0;}
case 25:
if (ch == 'w') {AddCh(); goto case 26;}
else {goto case 0;}
case 26:
if (ch == 'o') {AddCh(); goto case 27;}
else {goto case 0;}
case 27:
if (ch == 'c') {AddCh(); goto case 28;}
else {goto case 0;}
case 28:
if (ch == 'h') {AddCh(); goto case 52;}
else {goto case 0;}
case 29:
if (ch == 'n') {AddCh(); goto case 30;}
else {goto case 0;}
case 30:
if (ch == 'n') {AddCh(); goto case 31;}
else {goto case 0;}
case 31:
if (ch == 'e') {AddCh(); goto case 32;}
else {goto case 0;}
case 32:
if (ch == 'r') {AddCh(); goto case 33;}
else {goto case 0;}
case 33:
if (ch == 's') {AddCh(); goto case 34;}
else {goto case 0;}
case 34:
if (ch == 't') {AddCh(); goto case 35;}
else {goto case 0;}
case 35:
if (ch == 'a') {AddCh(); goto case 36;}
else {goto case 0;}
case 36:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 37:
if (ch == 'e') {AddCh(); goto case 38;}
else {goto case 0;}
case 38:
if (ch == 'i') {AddCh(); goto case 39;}
else {goto case 0;}
case 39:
if (ch == 't') {AddCh(); goto case 40;}
else {goto case 0;}
case 40:
if (ch == 'a') {AddCh(); goto case 41;}
else {goto case 0;}
case 41:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 42:
if (ch == 'm') {AddCh(); goto case 43;}
else {goto case 0;}
case 43:
if (ch == 's') {AddCh(); goto case 44;}
else {goto case 0;}
case 44:
if (ch == 't') {AddCh(); goto case 45;}
else {goto case 0;}
case 45:
if (ch == 'a') {AddCh(); goto case 46;}
else {goto case 0;}
case 46:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 47:
if (ch == 'n') {AddCh(); goto case 48;}
else {goto case 0;}
case 48:
if (ch == 'n') {AddCh(); goto case 49;}
else {goto case 0;}
case 49:
if (ch == 't') {AddCh(); goto case 50;}
else {goto case 0;}
case 50:
if (ch == 'a') {AddCh(); goto case 51;}
else {goto case 0;}
case 51:
if (ch == 'g') {AddCh(); goto case 52;}
else {goto case 0;}
case 52:
{t.kind = 2; break;}
case 53:
if (ch == 'd') {AddCh(); goto case 54;}
else {goto case 0;}
case 54:
{t.kind = 3; break;}
case 55:
recEnd = pos; recKind = 4;
if (ch >= '0' && ch <= '9') {AddCh(); goto case 55;}
else {t.kind = 4; break;}
case 56:
recEnd = pos; recKind = 3;
if (ch == 'a') {AddCh(); goto case 1;}
else if (ch == 'u') {AddCh(); goto case 62;}
else {t.kind = 3; break;}
case 57:
if (ch == 'e') {AddCh(); goto case 2;}
else if (ch == 'r') {AddCh(); goto case 37;}
else {goto case 0;}
case 58:
recEnd = pos; recKind = 3;
if (ch == 228) {AddCh(); goto case 3;}
else if (ch == 'a') {AddCh(); goto case 5;}
else if (ch == 'o') {AddCh(); goto case 14;}
else if (ch == 'i') {AddCh(); goto case 63;}
else {t.kind = 3; break;}
case 59:
if (ch == 'p') {AddCh(); goto case 4;}
else if (ch == 'u') {AddCh(); goto case 6;}
else {goto case 0;}
case 60:
if (ch == 'e') {AddCh(); goto case 7;}
else if (ch == 'a') {AddCh(); goto case 42;}
else if (ch == 'o') {AddCh(); goto case 47;}
else if (ch == 't') {AddCh(); goto case 53;}
else {goto case 0;}
case 61:
if (ch == 'e') {AddCh(); goto case 12;}
else if (ch == 'i') {AddCh(); goto case 18;}
else if (ch == 'o') {AddCh(); goto case 29;}
else {goto case 0;}
case 62:
if (ch == 'l' || ch == 'n') {AddCh(); goto case 13;}
else {goto case 0;}
case 63:
if (ch == 't') {AddCh(); goto case 24;}
else if (ch == 'n') {AddCh(); goto case 54;}
else {goto case 0;}
case 64:
{t.kind = 5; break;}
case 65:
{t.kind = 6; break;}
}
t.val = new String(tval, 0, tlen);
return t;
}
void Init() {
pos = -1; line = 1; col = 0; charPos = -1;
oldEols = 0;
NextCh();
if (ch == 0xEF) { // check optional byte order mark for UTF-8
NextCh(); int ch1 = ch;
NextCh(); int ch2 = ch;
if (ch1 != 0xBB || ch2 != 0xBF) {
throw new FatalError(String.Format("illegal byte order mark: EF {0,2:X} {1,2:X}", ch1, ch2));
}
buffer = new UTF8Buffer(buffer); col = 0; charPos = -1;
NextCh();
}
pt = tokens = new Token(); // first token is a dummy
}
public void Parse() {
la = new Token();
la.val = "";
Get();
Followup();
Expect(0);
}