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() { if (pt.next == null) { do { pt = pt.next = NextToken(); } while (pt.kind > maxT); // skip pragmas } else { do { pt = pt.next; } while (pt.kind > maxT); } 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 || ch == ' ' ) NextCh(); if (ch == '/' && Comment0()) return NextToken(); t = new Token(); t.pos = pos; t.col = col; t.line = line; int state; try { state = start[ch]; } catch (KeyNotFoundException) { state = 0; } tlen = 0; AddCh(); switch (state) { case -1: { t.kind = eofSym; break; } // NextCh already done case 0: { t.kind = noSym; break; } // NextCh already done case 1: if (ch == '-' || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') { AddCh(); goto case 1; } else { t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t; } case 2: { t.kind = 2; break; } case 3: { t.kind = 3; break; } case 4: { t.kind = 4; break; } case 5: if (ch == '!') { AddCh(); goto case 6; } else { t.kind = noSym; break; } case 6: if (ch == '-') { AddCh(); goto case 7; } else { t.kind = noSym; break; } case 7: if (ch == '-') { AddCh(); goto case 8; } else { t.kind = noSym; break; } case 8: { t.kind = 5; break; } case 9: { t.kind = 6; break; } case 10: { t.kind = 7; break; } case 11: { t.kind = 8; break; } case 12: { t.kind = 10; break; } case 13: { t.kind = 11; break; } case 14: { t.kind = 23; break; } case 15: { t.kind = 24; break; } case 16: { t.kind = 25; break; } case 17: { t.kind = 26; break; } case 18: { t.kind = 27; break; } case 19: { t.kind = 28; break; } case 20: { t.kind = 29; break; } case 21: { t.kind = 32; break; } case 22: { t.kind = 33; break; } case 23: { t.kind = 34; break; } case 24: { t.kind = 35; break; } case 25: { t.kind = 36; break; } case 26: if (ch == '=') { AddCh(); goto case 27; } else { t.kind = noSym; break; } case 27: { t.kind = 37; break; } case 28: if (ch == '=') { AddCh(); goto case 29; } else { t.kind = noSym; break; } case 29: { t.kind = 38; break; } case 30: if (ch == '=') { AddCh(); goto case 31; } else { t.kind = noSym; break; } case 31: { t.kind = 39; break; } case 32: { t.kind = 40; break; } case 33: { t.kind = 41; break; } case 34: { t.kind = 42; break; } case 35: if (ch == 'i') { AddCh(); goto case 36; } else { t.kind = noSym; break; } case 36: if (ch == 'm') { AddCh(); goto case 37; } else { t.kind = noSym; break; } case 37: if (ch == 'p') { AddCh(); goto case 38; } else { t.kind = noSym; break; } case 38: if (ch == 'o') { AddCh(); goto case 39; } else { t.kind = noSym; break; } case 39: if (ch == 'r') { AddCh(); goto case 40; } else { t.kind = noSym; break; } case 40: if (ch == 't') { AddCh(); goto case 41; } else { t.kind = noSym; break; } case 41: if (ch == 'a') { AddCh(); goto case 42; } else { t.kind = noSym; break; } case 42: if (ch == 'n') { AddCh(); goto case 43; } else { t.kind = noSym; break; } case 43: if (ch == 't') { AddCh(); goto case 44; } else { t.kind = noSym; break; } case 44: { t.kind = 43; break; } case 45: { t.kind = 44; break; } case 46: { t.kind = 45; break; } case 47: { t.kind = 47; break; } case 48: if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') { AddCh(); goto case 1; } else if (ch == '-') { AddCh(); goto case 52; } else { t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t; } case 49: if (ch == '=') { AddCh(); goto case 25; } else { t.kind = 30; break; } case 50: if (ch == '=') { AddCh(); goto case 32; } else { t.kind = 31; break; } case 51: if (ch == '-' || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') { AddCh(); goto case 1; } else if (ch == 92) { AddCh(); goto case 46; } else { t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t; } case 52: if (ch == '-' || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') { AddCh(); goto case 1; } else if (ch == '>') { AddCh(); goto case 9; } else { t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t; } } t.val = new String(tval, 0, tlen); return t; }
void Init() { pos = -1; line = 1; col = 0; 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; NextCh(); } start = new Dictionary<int, int>(128); for (int i = 65; i <= 84; ++i) start[i] = 1; for (int i = 86; i <= 90; ++i) start[i] = 1; for (int i = 95; i <= 95; ++i) start[i] = 1; for (int i = 97; i <= 122; ++i) start[i] = 1; for (int i = 10; i <= 10; ++i) start[i] = 2; for (int i = 13; i <= 13; ++i) start[i] = 2; for (int i = 48; i <= 57; ++i) start[i] = 3; for (int i = 9; i <= 9; ++i) start[i] = 4; for (int i = 11; i <= 12; ++i) start[i] = 4; for (int i = 32; i <= 32; ++i) start[i] = 4; start[60] = 5; start[45] = 48; start[39] = 10; start[34] = 11; start[40] = 12; start[41] = 13; start[64] = 14; start[123] = 15; start[59] = 16; start[125] = 17; start[44] = 18; start[43] = 19; start[62] = 20; start[126] = 49; start[42] = 50; start[35] = 21; start[46] = 22; start[91] = 23; start[61] = 24; start[124] = 26; start[36] = 28; start[94] = 30; start[93] = 33; start[58] = 34; start[33] = 35; start[47] = 45; start[85] = 51; start[37] = 47; start[Buffer.EOF] = -1; pt = tokens = new Token(); // first token is a dummy }
public void Parse() { la = new Token(); la.val = ""; Get(); CSS3(); Expect(0); }