Initial commit
This commit is contained in:
@@ -0,0 +1,658 @@
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/* The following code was generated by JFlex 1.6.1 */
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/* **********************************************
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* Duale Hochschule Baden-Württemberg Karlsruhe
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* Prof. Dr. Jörn Eisenbiegler
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*
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* Vorlesung Übersetzerbau
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* Praxis AS-Scanner mit JFlex 4
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*
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* **********************************************
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*/
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package de.dhbw.compiler.jflexasscanner;
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/**
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* This class is a scanner generated by
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* <a href="http://www.jflex.de/">JFlex</a> 1.6.1
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* from the specification file <tt>C:/Development/Schule/Java/ÜB-Praxis-JFlex Scanner für AS-Leer/src/de/dhbw/compiler/jflexasscanner/JFlexASScanner.flex</tt>
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*/
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public final class JFlexASScanner {
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/** This character denotes the end of file */
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public static final int YYEOF = -1;
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/** initial size of the lookahead buffer */
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private static final int ZZ_BUFFERSIZE = 16384;
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/** lexical states */
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public static final int YYINITIAL = 0;
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public static final int NUM = 2;
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public static final int FRAC = 4;
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public static final int EXP = 6;
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public static final int STR = 8;
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public static final int NULL = 10;
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/**
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* ZZ_LEXSTATE[l] is the state in the DFA for the lexical state l
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* ZZ_LEXSTATE[l+1] is the state in the DFA for the lexical state l
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* at the beginning of a line
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* l is of the form l = 2*k, k a non negative integer
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*/
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private static final int ZZ_LEXSTATE[] = {
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
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};
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/**
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* Translates characters to character classes
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*/
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private static final String ZZ_CMAP_PACKED =
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"\10\0\3\1\2\0\1\1\22\0\1\1\13\0\1\11\3\0\12\3"+
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"\7\0\32\2\1\7\1\0\1\10\3\0\13\2\1\6\1\2\1\4"+
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"\6\2\1\5\5\2\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uff95\0";
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/**
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* Translates characters to character classes
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*/
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private static final char [] ZZ_CMAP = zzUnpackCMap(ZZ_CMAP_PACKED);
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/**
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* Translates DFA states to action switch labels.
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*/
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private static final int [] ZZ_ACTION = zzUnpackAction();
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private static final String ZZ_ACTION_PACKED_0 =
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"\2\0\1\1\1\2\1\3\1\4\1\3\1\5\1\6"+
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"\1\7\2\3\1\10";
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private static int [] zzUnpackAction() {
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int [] result = new int[13];
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int offset = 0;
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offset = zzUnpackAction(ZZ_ACTION_PACKED_0, offset, result);
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return result;
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}
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private static int zzUnpackAction(String packed, int offset, int [] result) {
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int i = 0; /* index in packed string */
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int j = offset; /* index in unpacked array */
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int l = packed.length();
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while (i < l) {
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int count = packed.charAt(i++);
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int value = packed.charAt(i++);
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do result[j++] = value; while (--count > 0);
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}
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return j;
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}
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/**
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* Translates a state to a row index in the transition table
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*/
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private static final int [] ZZ_ROWMAP = zzUnpackRowMap();
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private static final String ZZ_ROWMAP_PACKED_0 =
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"\0\0\0\12\0\12\0\24\0\36\0\50\0\62\0\12"+
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"\0\12\0\12\0\74\0\106\0\36";
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private static int [] zzUnpackRowMap() {
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int [] result = new int[13];
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int offset = 0;
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offset = zzUnpackRowMap(ZZ_ROWMAP_PACKED_0, offset, result);
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return result;
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}
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private static int zzUnpackRowMap(String packed, int offset, int [] result) {
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int i = 0; /* index in packed string */
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int j = offset; /* index in unpacked array */
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int l = packed.length();
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while (i < l) {
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int high = packed.charAt(i++) << 16;
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result[j++] = high | packed.charAt(i++);
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}
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return j;
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}
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/**
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* The transition table of the DFA
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*/
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private static final int [] ZZ_TRANS = zzUnpackTrans();
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private static final String ZZ_TRANS_PACKED_0 =
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"\1\3\1\4\1\5\1\6\1\7\2\5\1\10\1\11"+
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"\1\12\13\0\1\4\12\0\5\5\5\0\1\5\1\6"+
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"\3\5\5\0\3\5\1\13\1\5\5\0\4\5\1\14"+
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"\5\0\4\5\1\15\3\0";
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private static int [] zzUnpackTrans() {
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int [] result = new int[80];
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int offset = 0;
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offset = zzUnpackTrans(ZZ_TRANS_PACKED_0, offset, result);
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return result;
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}
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private static int zzUnpackTrans(String packed, int offset, int [] result) {
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int i = 0; /* index in packed string */
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int j = offset; /* index in unpacked array */
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int l = packed.length();
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while (i < l) {
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int count = packed.charAt(i++);
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int value = packed.charAt(i++);
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value--;
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do result[j++] = value; while (--count > 0);
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}
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return j;
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}
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/* error codes */
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private static final int ZZ_UNKNOWN_ERROR = 0;
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private static final int ZZ_NO_MATCH = 1;
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private static final int ZZ_PUSHBACK_2BIG = 2;
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/* error messages for the codes above */
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private static final String ZZ_ERROR_MSG[] = {
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"Unknown internal scanner error",
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"Error: could not match input",
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"Error: pushback value was too large"
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};
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/**
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* ZZ_ATTRIBUTE[aState] contains the attributes of state <code>aState</code>
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*/
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private static final int [] ZZ_ATTRIBUTE = zzUnpackAttribute();
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private static final String ZZ_ATTRIBUTE_PACKED_0 =
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"\1\0\1\10\1\11\4\1\3\11\3\1";
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private static int [] zzUnpackAttribute() {
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int [] result = new int[13];
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int offset = 0;
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offset = zzUnpackAttribute(ZZ_ATTRIBUTE_PACKED_0, offset, result);
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return result;
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}
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private static int zzUnpackAttribute(String packed, int offset, int [] result) {
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int i = 0; /* index in packed string */
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int j = offset; /* index in unpacked array */
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int l = packed.length();
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while (i < l) {
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int count = packed.charAt(i++);
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int value = packed.charAt(i++);
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do result[j++] = value; while (--count > 0);
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}
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return j;
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}
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/** the input device */
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private java.io.Reader zzReader;
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/** the current state of the DFA */
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private int zzState;
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/** the current lexical state */
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private int zzLexicalState = YYINITIAL;
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/** this buffer contains the current text to be matched and is
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the source of the yytext() string */
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private char zzBuffer[] = new char[ZZ_BUFFERSIZE];
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/** the textposition at the last accepting state */
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private int zzMarkedPos;
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/** the current text position in the buffer */
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private int zzCurrentPos;
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/** startRead marks the beginning of the yytext() string in the buffer */
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private int zzStartRead;
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/** endRead marks the last character in the buffer, that has been read
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from input */
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private int zzEndRead;
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/** number of newlines encountered up to the start of the matched text */
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private int yyline;
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/** the number of characters up to the start of the matched text */
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private int yychar;
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/**
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* the number of characters from the last newline up to the start of the
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* matched text
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*/
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private int yycolumn;
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/**
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* zzAtBOL == true <=> the scanner is currently at the beginning of a line
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*/
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private boolean zzAtBOL = true;
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/** zzAtEOF == true <=> the scanner is at the EOF */
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private boolean zzAtEOF;
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/** denotes if the user-EOF-code has already been executed */
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private boolean zzEOFDone;
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/**
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* The number of occupied positions in zzBuffer beyond zzEndRead.
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* When a lead/high surrogate has been read from the input stream
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* into the final zzBuffer position, this will have a value of 1;
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* otherwise, it will have a value of 0.
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*/
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private int zzFinalHighSurrogate = 0;
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/* user code: */
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/**
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* Creates a new scanner
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*
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* @param in the java.io.Reader to read input from.
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*/
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public JFlexASScanner(java.io.Reader in) {
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this.zzReader = in;
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}
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/**
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* Unpacks the compressed character translation table.
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*
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* @param packed the packed character translation table
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* @return the unpacked character translation table
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*/
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private static char [] zzUnpackCMap(String packed) {
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char [] map = new char[0x110000];
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int i = 0; /* index in packed string */
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int j = 0; /* index in unpacked array */
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while (i < 80) {
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int count = packed.charAt(i++);
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char value = packed.charAt(i++);
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do map[j++] = value; while (--count > 0);
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}
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return map;
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}
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||||
/**
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* Refills the input buffer.
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*
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* @return <code>false</code>, iff there was new input.
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*
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* @exception java.io.IOException if any I/O-Error occurs
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*/
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private boolean zzRefill() throws java.io.IOException {
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/* first: make room (if you can) */
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if (zzStartRead > 0) {
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zzEndRead += zzFinalHighSurrogate;
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zzFinalHighSurrogate = 0;
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System.arraycopy(zzBuffer, zzStartRead,
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zzBuffer, 0,
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zzEndRead-zzStartRead);
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/* translate stored positions */
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zzEndRead-= zzStartRead;
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zzCurrentPos-= zzStartRead;
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zzMarkedPos-= zzStartRead;
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zzStartRead = 0;
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}
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/* is the buffer big enough? */
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if (zzCurrentPos >= zzBuffer.length - zzFinalHighSurrogate) {
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/* if not: blow it up */
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char newBuffer[] = new char[zzBuffer.length*2];
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System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
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zzBuffer = newBuffer;
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zzEndRead += zzFinalHighSurrogate;
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zzFinalHighSurrogate = 0;
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}
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/* fill the buffer with new input */
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int requested = zzBuffer.length - zzEndRead;
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int numRead = zzReader.read(zzBuffer, zzEndRead, requested);
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/* not supposed to occur according to specification of java.io.Reader */
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if (numRead == 0) {
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throw new java.io.IOException("Reader returned 0 characters. See JFlex examples for workaround.");
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}
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if (numRead > 0) {
|
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zzEndRead += numRead;
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/* If numRead == requested, we might have requested to few chars to
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encode a full Unicode character. We assume that a Reader would
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otherwise never return half characters. */
|
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if (numRead == requested) {
|
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if (Character.isHighSurrogate(zzBuffer[zzEndRead - 1])) {
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--zzEndRead;
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zzFinalHighSurrogate = 1;
|
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}
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}
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/* potentially more input available */
|
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return false;
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}
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|
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/* numRead < 0 ==> end of stream */
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return true;
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}
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||||
|
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/**
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* Closes the input stream.
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*/
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public final void yyclose() throws java.io.IOException {
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zzAtEOF = true; /* indicate end of file */
|
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zzEndRead = zzStartRead; /* invalidate buffer */
|
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|
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if (zzReader != null)
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zzReader.close();
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}
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|
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/**
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* Resets the scanner to read from a new input stream.
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* Does not close the old reader.
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*
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||||
* All internal variables are reset, the old input stream
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* <b>cannot</b> be reused (internal buffer is discarded and lost).
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* Lexical state is set to <tt>ZZ_INITIAL</tt>.
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*
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* Internal scan buffer is resized down to its initial length, if it has grown.
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*
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* @param reader the new input stream
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||||
*/
|
||||
public final void yyreset(java.io.Reader reader) {
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||||
zzReader = reader;
|
||||
zzAtBOL = true;
|
||||
zzAtEOF = false;
|
||||
zzEOFDone = false;
|
||||
zzEndRead = zzStartRead = 0;
|
||||
zzCurrentPos = zzMarkedPos = 0;
|
||||
zzFinalHighSurrogate = 0;
|
||||
yyline = yychar = yycolumn = 0;
|
||||
zzLexicalState = YYINITIAL;
|
||||
if (zzBuffer.length > ZZ_BUFFERSIZE)
|
||||
zzBuffer = new char[ZZ_BUFFERSIZE];
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns the current lexical state.
|
||||
*/
|
||||
public final int yystate() {
|
||||
return zzLexicalState;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Enters a new lexical state
|
||||
*
|
||||
* @param newState the new lexical state
|
||||
*/
|
||||
public final void yybegin(int newState) {
|
||||
zzLexicalState = newState;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns the text matched by the current regular expression.
|
||||
*/
|
||||
public final String yytext() {
|
||||
return new String( zzBuffer, zzStartRead, zzMarkedPos-zzStartRead );
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns the character at position <tt>pos</tt> from the
|
||||
* matched text.
|
||||
*
|
||||
* It is equivalent to yytext().charAt(pos), but faster
|
||||
*
|
||||
* @param pos the position of the character to fetch.
|
||||
* A value from 0 to yylength()-1.
|
||||
*
|
||||
* @return the character at position pos
|
||||
*/
|
||||
public final char yycharat(int pos) {
|
||||
return zzBuffer[zzStartRead+pos];
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns the length of the matched text region.
|
||||
*/
|
||||
public final int yylength() {
|
||||
return zzMarkedPos-zzStartRead;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Reports an error that occured while scanning.
|
||||
*
|
||||
* In a wellformed scanner (no or only correct usage of
|
||||
* yypushback(int) and a match-all fallback rule) this method
|
||||
* will only be called with things that "Can't Possibly Happen".
|
||||
* If this method is called, something is seriously wrong
|
||||
* (e.g. a JFlex bug producing a faulty scanner etc.).
|
||||
*
|
||||
* Usual syntax/scanner level error handling should be done
|
||||
* in error fallback rules.
|
||||
*
|
||||
* @param errorCode the code of the errormessage to display
|
||||
*/
|
||||
private void zzScanError(int errorCode) {
|
||||
String message;
|
||||
try {
|
||||
message = ZZ_ERROR_MSG[errorCode];
|
||||
}
|
||||
catch (ArrayIndexOutOfBoundsException e) {
|
||||
message = ZZ_ERROR_MSG[ZZ_UNKNOWN_ERROR];
|
||||
}
|
||||
|
||||
throw new Error(message);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Pushes the specified amount of characters back into the input stream.
|
||||
*
|
||||
* They will be read again by then next call of the scanning method
|
||||
*
|
||||
* @param number the number of characters to be read again.
|
||||
* This number must not be greater than yylength()!
|
||||
*/
|
||||
public void yypushback(int number) {
|
||||
if ( number > yylength() )
|
||||
zzScanError(ZZ_PUSHBACK_2BIG);
|
||||
|
||||
zzMarkedPos -= number;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Resumes scanning until the next regular expression is matched,
|
||||
* the end of input is encountered or an I/O-Error occurs.
|
||||
*
|
||||
* @return the next token
|
||||
* @exception java.io.IOException if any I/O-Error occurs
|
||||
*/
|
||||
public Token nextToken() throws java.io.IOException {
|
||||
int zzInput;
|
||||
int zzAction;
|
||||
|
||||
// cached fields:
|
||||
int zzCurrentPosL;
|
||||
int zzMarkedPosL;
|
||||
int zzEndReadL = zzEndRead;
|
||||
char [] zzBufferL = zzBuffer;
|
||||
char [] zzCMapL = ZZ_CMAP;
|
||||
|
||||
int [] zzTransL = ZZ_TRANS;
|
||||
int [] zzRowMapL = ZZ_ROWMAP;
|
||||
int [] zzAttrL = ZZ_ATTRIBUTE;
|
||||
|
||||
while (true) {
|
||||
zzMarkedPosL = zzMarkedPos;
|
||||
|
||||
boolean zzR = false;
|
||||
int zzCh;
|
||||
int zzCharCount;
|
||||
for (zzCurrentPosL = zzStartRead ;
|
||||
zzCurrentPosL < zzMarkedPosL ;
|
||||
zzCurrentPosL += zzCharCount ) {
|
||||
zzCh = Character.codePointAt(zzBufferL, zzCurrentPosL, zzMarkedPosL);
|
||||
zzCharCount = Character.charCount(zzCh);
|
||||
switch (zzCh) {
|
||||
case '\u000B':
|
||||
case '\u000C':
|
||||
case '\u0085':
|
||||
case '\u2028':
|
||||
case '\u2029':
|
||||
yyline++;
|
||||
yycolumn = 0;
|
||||
zzR = false;
|
||||
break;
|
||||
case '\r':
|
||||
yyline++;
|
||||
yycolumn = 0;
|
||||
zzR = true;
|
||||
break;
|
||||
case '\n':
|
||||
if (zzR)
|
||||
zzR = false;
|
||||
else {
|
||||
yyline++;
|
||||
yycolumn = 0;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
zzR = false;
|
||||
yycolumn += zzCharCount;
|
||||
}
|
||||
}
|
||||
|
||||
if (zzR) {
|
||||
// peek one character ahead if it is \n (if we have counted one line too much)
|
||||
boolean zzPeek;
|
||||
if (zzMarkedPosL < zzEndReadL)
|
||||
zzPeek = zzBufferL[zzMarkedPosL] == '\n';
|
||||
else if (zzAtEOF)
|
||||
zzPeek = false;
|
||||
else {
|
||||
boolean eof = zzRefill();
|
||||
zzEndReadL = zzEndRead;
|
||||
zzMarkedPosL = zzMarkedPos;
|
||||
zzBufferL = zzBuffer;
|
||||
if (eof)
|
||||
zzPeek = false;
|
||||
else
|
||||
zzPeek = zzBufferL[zzMarkedPosL] == '\n';
|
||||
}
|
||||
if (zzPeek) yyline--;
|
||||
}
|
||||
zzAction = -1;
|
||||
|
||||
zzCurrentPosL = zzCurrentPos = zzStartRead = zzMarkedPosL;
|
||||
|
||||
zzState = ZZ_LEXSTATE[zzLexicalState];
|
||||
|
||||
// set up zzAction for empty match case:
|
||||
int zzAttributes = zzAttrL[zzState];
|
||||
if ( (zzAttributes & 1) == 1 ) {
|
||||
zzAction = zzState;
|
||||
}
|
||||
|
||||
|
||||
zzForAction: {
|
||||
while (true) {
|
||||
|
||||
if (zzCurrentPosL < zzEndReadL) {
|
||||
zzInput = Character.codePointAt(zzBufferL, zzCurrentPosL, zzEndReadL);
|
||||
zzCurrentPosL += Character.charCount(zzInput);
|
||||
}
|
||||
else if (zzAtEOF) {
|
||||
zzInput = YYEOF;
|
||||
break zzForAction;
|
||||
}
|
||||
else {
|
||||
// store back cached positions
|
||||
zzCurrentPos = zzCurrentPosL;
|
||||
zzMarkedPos = zzMarkedPosL;
|
||||
boolean eof = zzRefill();
|
||||
// get translated positions and possibly new buffer
|
||||
zzCurrentPosL = zzCurrentPos;
|
||||
zzMarkedPosL = zzMarkedPos;
|
||||
zzBufferL = zzBuffer;
|
||||
zzEndReadL = zzEndRead;
|
||||
if (eof) {
|
||||
zzInput = YYEOF;
|
||||
break zzForAction;
|
||||
}
|
||||
else {
|
||||
zzInput = Character.codePointAt(zzBufferL, zzCurrentPosL, zzEndReadL);
|
||||
zzCurrentPosL += Character.charCount(zzInput);
|
||||
}
|
||||
}
|
||||
int zzNext = zzTransL[ zzRowMapL[zzState] + zzCMapL[zzInput] ];
|
||||
if (zzNext == -1) break zzForAction;
|
||||
zzState = zzNext;
|
||||
|
||||
zzAttributes = zzAttrL[zzState];
|
||||
if ( (zzAttributes & 1) == 1 ) {
|
||||
zzAction = zzState;
|
||||
zzMarkedPosL = zzCurrentPosL;
|
||||
if ( (zzAttributes & 8) == 8 ) break zzForAction;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
// store back cached position
|
||||
zzMarkedPos = zzMarkedPosL;
|
||||
|
||||
if (zzInput == YYEOF && zzStartRead == zzCurrentPos) {
|
||||
zzAtEOF = true;
|
||||
{ return new Token(Token.EOF, "", yyline+1, yycolumn+1);
|
||||
}
|
||||
}
|
||||
else {
|
||||
switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
|
||||
case 1:
|
||||
{ throw new Error("Illegal character <" + yytext() + ">");
|
||||
}
|
||||
case 9: break;
|
||||
case 2:
|
||||
{ /* Ignore */
|
||||
}
|
||||
case 10: break;
|
||||
case 3:
|
||||
{ return new Token(Token.ID, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 11: break;
|
||||
case 4:
|
||||
{ return new Token(Token.NUM, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 12: break;
|
||||
case 5:
|
||||
{ return new Token(Token.LSBR, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 13: break;
|
||||
case 6:
|
||||
{ return new Token(Token.RSBR, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 14: break;
|
||||
case 7:
|
||||
{ return new Token(Token.COMMA, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 15: break;
|
||||
case 8:
|
||||
{ return new Token(Token.NULL, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 16: break;
|
||||
default:
|
||||
zzScanError(ZZ_NO_MATCH);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user