[06 - Top Down Parser] Fix 3 tests
- program00BeginEnd - program01BeginEndMore - program02BeginEnd2
This commit is contained in:
10
ÜB-Praxis-Abstiegsparser für X-Leer/.idea/libraries/lib.xml
generated
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10
ÜB-Praxis-Abstiegsparser für X-Leer/.idea/libraries/lib.xml
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@@ -0,0 +1,10 @@
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<component name="libraryTable">
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<library name="lib">
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<CLASSES>
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<root url="file://$PROJECT_DIR$/lib" />
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</CLASSES>
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<JAVADOC />
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<SOURCES />
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<jarDirectory url="file://$PROJECT_DIR$/lib" recursive="false" />
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</library>
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</component>
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@@ -1,991 +0,0 @@
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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 X Abstiegsparser
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* - Scanner-Definition
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*
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* **********************************************
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*/
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package de.dhbw.compiler.xparser;
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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:/Users/eisenbiegler/Dropbox/workspace_<65>b/<2F>B-Praxis-Abstiegsparser für X-Leer/src/de/dhbw/compiler/XParser/JFlexXScanner.lex</tt>
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*/
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public final class JFlexXScanner {
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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 INT = 2;
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public static final int FRACTION = 4;
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public static final int EXPVZ = 6;
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public static final int EXP = 8;
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public static final int STRING = 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, 2, 2, 3, 3, 4, 4, 5, 5
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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\42\1\0\2\42\22\0\1\43\1\0\1\41\5\0\1\24"+
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"\1\25\1\20\1\16\1\0\1\17\1\35\1\21\1\40\11\37\1\22"+
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"\1\32\1\26\1\23\1\27\2\0\4\36\1\45\25\36\1\0\1\44"+
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"\4\0\1\3\1\33\1\36\1\4\1\2\1\11\1\15\1\30\1\6"+
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"\2\36\1\12\1\34\1\7\1\13\1\5\1\36\1\1\1\14\1\10"+
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"\2\36\1\31\3\36\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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"\6\0\1\1\10\2\1\3\1\4\1\5\1\6\1\7"+
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"\1\10\1\11\1\12\1\13\1\14\1\2\1\15\1\2"+
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"\1\16\1\17\1\20\1\21\1\22\2\23\1\24\1\25"+
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"\2\26\1\27\2\30\1\31\1\32\1\33\1\34\1\35"+
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"\1\36\1\37\1\35\5\2\1\40\4\2\1\0\1\41"+
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"\2\2\1\42\1\0\1\43\1\0\1\44\1\45\1\46"+
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"\1\2\1\47\3\2\1\50\2\2\1\51\1\2\1\0"+
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"\2\2\1\52\1\53\2\2\1\54\2\2\1\55\2\2"+
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"\1\56\1\2\1\57\1\2\1\60\1\61\1\2\1\62"+
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"\1\63";
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private static int [] zzUnpackAction() {
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int [] result = new int[103];
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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\46\0\114\0\162\0\230\0\276\0\344\0\u010a"+
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"\0\u0130\0\u0156\0\u017c\0\u01a2\0\u01c8\0\u01ee\0\u0214\0\344"+
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"\0\344\0\344\0\u023a\0\u0260\0\344\0\344\0\344\0\344"+
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"\0\344\0\u0286\0\344\0\u02ac\0\344\0\344\0\u02d2\0\344"+
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"\0\u02f8\0\344\0\u031e\0\344\0\344\0\344\0\u0344\0\344"+
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"\0\344\0\u036a\0\344\0\344\0\344\0\344\0\344\0\344"+
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"\0\344\0\u0390\0\u03b6\0\u03dc\0\u0402\0\u0428\0\u044e\0\u0156"+
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"\0\u0474\0\u049a\0\u04c0\0\u04e6\0\u050c\0\344\0\u0532\0\u0558"+
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"\0\344\0\u057e\0\344\0\u05a4\0\344\0\344\0\344\0\u05ca"+
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"\0\u0156\0\u05f0\0\u0616\0\u063c\0\u0156\0\u0662\0\u0688\0\u0156"+
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"\0\u06ae\0\u06d4\0\u06fa\0\u0720\0\u0156\0\u0156\0\u0746\0\u076c"+
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"\0\u0156\0\u0792\0\u07b8\0\344\0\u07de\0\u0804\0\u0156\0\u082a"+
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"\0\u0156\0\u0850\0\u0156\0\u0156\0\u0876\0\u0156\0\u0156";
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private static int [] zzUnpackRowMap() {
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int [] result = new int[103];
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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\7\1\10\1\11\2\12\1\13\1\14\1\12\1\15"+
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"\1\16\2\12\1\17\1\12\1\20\1\21\1\22\1\23"+
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"\1\24\1\25\1\26\1\27\1\30\1\31\1\12\1\32"+
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"\1\33\1\34\1\12\1\35\1\12\1\36\1\37\1\40"+
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"\2\41\1\7\1\12\2\42\1\43\32\42\1\44\1\42"+
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"\2\45\4\42\1\43\2\46\1\47\34\46\2\50\4\46"+
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"\1\47\17\51\1\52\17\51\1\53\1\54\5\51\37\55"+
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"\2\56\5\55\1\57\15\60\4\57\1\60\5\57\2\60"+
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"\1\57\4\60\2\57\1\61\1\57\1\60\1\62\1\60"+
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"\47\0\1\12\1\63\13\12\12\0\2\12\1\0\2\12"+
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"\1\0\3\12\4\0\1\12\1\0\6\12\1\64\2\12"+
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"\1\65\3\12\12\0\2\12\1\0\2\12\1\0\3\12"+
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"\4\0\1\12\1\0\15\12\12\0\2\12\1\0\2\12"+
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"\1\0\3\12\4\0\1\12\1\0\1\66\14\12\12\0"+
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"\2\12\1\0\2\12\1\0\3\12\4\0\1\12\1\0"+
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"\6\12\1\67\1\12\1\70\4\12\12\0\2\12\1\0"+
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"\2\12\1\0\3\12\4\0\1\12\1\0\15\12\12\0"+
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"\1\71\1\12\1\0\2\12\1\0\3\12\4\0\1\12"+
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"\1\0\11\12\1\72\1\73\2\12\12\0\2\12\1\0"+
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"\2\12\1\0\3\12\4\0\1\12\1\0\7\12\1\74"+
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"\5\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
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"\1\12\20\0\1\75\50\0\1\76\23\0\15\12\12\0"+
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"\1\77\1\12\1\0\2\12\1\0\3\12\4\0\1\12"+
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"\1\0\1\12\1\100\13\12\12\0\2\12\1\0\2\12"+
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"\1\0\3\12\4\0\1\12\35\0\1\101\52\0\2\41"+
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"\21\0\1\102\17\0\2\103\24\0\1\104\17\0\2\105"+
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"\44\0\1\106\1\54\46\0\1\107\5\0\2\12\1\110"+
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||||
"\12\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
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"\1\12\1\0\3\12\1\111\11\12\12\0\2\12\1\0"+
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"\2\12\1\0\3\12\4\0\1\12\1\0\13\12\1\112"+
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||||
"\1\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
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||||
"\1\12\1\0\5\12\1\113\4\12\1\114\2\12\12\0"+
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||||
"\2\12\1\0\2\12\1\0\3\12\4\0\1\12\1\0"+
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||||
"\7\12\1\115\5\12\12\0\2\12\1\0\2\12\1\0"+
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||||
"\3\12\4\0\1\12\1\0\1\12\1\116\13\12\12\0"+
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"\2\12\1\0\2\12\1\0\3\12\4\0\1\12\1\0"+
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||||
"\12\12\1\117\2\12\12\0\2\12\1\0\2\12\1\0"+
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"\3\12\4\0\1\12\1\0\1\120\14\12\12\0\2\12"+
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"\1\0\2\12\1\0\3\12\4\0\1\12\1\0\1\121"+
|
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"\14\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
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"\1\12\20\75\1\122\25\75\1\0\5\12\1\123\7\12"+
|
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"\12\0\2\12\1\0\2\12\1\0\3\12\4\0\1\12"+
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"\1\0\14\12\1\124\12\0\2\12\1\0\2\12\1\0"+
|
||||
"\3\12\4\0\1\12\37\0\2\103\44\0\2\105\6\0"+
|
||||
"\3\12\1\125\11\12\12\0\2\12\1\0\2\12\1\0"+
|
||||
"\3\12\4\0\1\12\1\0\1\12\1\126\13\12\12\0"+
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||||
"\2\12\1\0\2\12\1\0\3\12\4\0\1\12\1\0"+
|
||||
"\6\12\1\127\6\12\12\0\2\12\1\0\2\12\1\0"+
|
||||
"\3\12\4\0\1\12\1\0\14\12\1\130\12\0\2\12"+
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||||
"\1\0\2\12\1\0\3\12\4\0\1\12\1\0\6\12"+
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||||
"\1\131\6\12\12\0\2\12\1\0\2\12\1\0\3\12"+
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"\4\0\1\12\1\0\2\12\1\132\12\12\12\0\2\12"+
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||||
"\1\0\2\12\1\0\3\12\4\0\1\12\1\0\5\12"+
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"\1\133\7\12\12\0\2\12\1\0\2\12\1\0\3\12"+
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"\4\0\1\12\20\75\1\122\1\134\24\75\1\0\11\12"+
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||||
"\1\135\3\12\12\0\2\12\1\0\2\12\1\0\3\12"+
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||||
"\4\0\1\12\1\0\5\12\1\136\7\12\12\0\2\12"+
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||||
"\1\0\2\12\1\0\3\12\4\0\1\12\1\0\7\12"+
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||||
"\1\137\5\12\12\0\2\12\1\0\2\12\1\0\3\12"+
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||||
"\4\0\1\12\1\0\1\140\14\12\12\0\2\12\1\0"+
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||||
"\2\12\1\0\3\12\4\0\1\12\1\0\7\12\1\141"+
|
||||
"\5\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
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||||
"\1\12\1\0\6\12\1\142\6\12\12\0\2\12\1\0"+
|
||||
"\2\12\1\0\3\12\4\0\1\12\1\0\1\12\1\143"+
|
||||
"\13\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
|
||||
"\1\12\1\0\6\12\1\144\6\12\12\0\2\12\1\0"+
|
||||
"\2\12\1\0\3\12\4\0\1\12\1\0\2\12\1\145"+
|
||||
"\12\12\12\0\2\12\1\0\2\12\1\0\3\12\4\0"+
|
||||
"\1\12\1\0\14\12\1\146\12\0\2\12\1\0\2\12"+
|
||||
"\1\0\3\12\4\0\1\12\1\0\15\12\12\0\2\12"+
|
||||
"\1\0\1\12\1\147\1\0\3\12\4\0\1\12";
|
||||
|
||||
private static int [] zzUnpackTrans() {
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||||
int [] result = new int[2204];
|
||||
int offset = 0;
|
||||
offset = zzUnpackTrans(ZZ_TRANS_PACKED_0, offset, result);
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||||
return result;
|
||||
}
|
||||
|
||||
private static int zzUnpackTrans(String packed, int offset, int [] result) {
|
||||
int i = 0; /* index in packed string */
|
||||
int j = offset; /* index in unpacked array */
|
||||
int l = packed.length();
|
||||
while (i < l) {
|
||||
int count = packed.charAt(i++);
|
||||
int value = packed.charAt(i++);
|
||||
value--;
|
||||
do result[j++] = value; while (--count > 0);
|
||||
}
|
||||
return j;
|
||||
}
|
||||
|
||||
|
||||
/* error codes */
|
||||
private static final int ZZ_UNKNOWN_ERROR = 0;
|
||||
private static final int ZZ_NO_MATCH = 1;
|
||||
private static final int ZZ_PUSHBACK_2BIG = 2;
|
||||
|
||||
/* error messages for the codes above */
|
||||
private static final String ZZ_ERROR_MSG[] = {
|
||||
"Unknown internal scanner error",
|
||||
"Error: could not match input",
|
||||
"Error: pushback value was too large"
|
||||
};
|
||||
|
||||
/**
|
||||
* ZZ_ATTRIBUTE[aState] contains the attributes of state <code>aState</code>
|
||||
*/
|
||||
private static final int [] ZZ_ATTRIBUTE = zzUnpackAttribute();
|
||||
|
||||
private static final String ZZ_ATTRIBUTE_PACKED_0 =
|
||||
"\6\0\1\11\10\1\3\11\2\1\5\11\1\1\1\11"+
|
||||
"\1\1\2\11\1\1\1\11\1\1\1\11\1\1\3\11"+
|
||||
"\1\1\2\11\1\1\7\11\13\1\1\0\1\11\2\1"+
|
||||
"\1\11\1\0\1\11\1\0\3\11\12\1\1\0\11\1"+
|
||||
"\1\11\13\1";
|
||||
|
||||
private static int [] zzUnpackAttribute() {
|
||||
int [] result = new int[103];
|
||||
int offset = 0;
|
||||
offset = zzUnpackAttribute(ZZ_ATTRIBUTE_PACKED_0, offset, result);
|
||||
return result;
|
||||
}
|
||||
|
||||
private static int zzUnpackAttribute(String packed, int offset, int [] result) {
|
||||
int i = 0; /* index in packed string */
|
||||
int j = offset; /* index in unpacked array */
|
||||
int l = packed.length();
|
||||
while (i < l) {
|
||||
int count = packed.charAt(i++);
|
||||
int value = packed.charAt(i++);
|
||||
do result[j++] = value; while (--count > 0);
|
||||
}
|
||||
return j;
|
||||
}
|
||||
|
||||
/** the input device */
|
||||
private java.io.Reader zzReader;
|
||||
|
||||
/** the current state of the DFA */
|
||||
private int zzState;
|
||||
|
||||
/** the current lexical state */
|
||||
private int zzLexicalState = YYINITIAL;
|
||||
|
||||
/** this buffer contains the current text to be matched and is
|
||||
the source of the yytext() string */
|
||||
private char zzBuffer[] = new char[ZZ_BUFFERSIZE];
|
||||
|
||||
/** the textposition at the last accepting state */
|
||||
private int zzMarkedPos;
|
||||
|
||||
/** the current text position in the buffer */
|
||||
private int zzCurrentPos;
|
||||
|
||||
/** startRead marks the beginning of the yytext() string in the buffer */
|
||||
private int zzStartRead;
|
||||
|
||||
/** endRead marks the last character in the buffer, that has been read
|
||||
from input */
|
||||
private int zzEndRead;
|
||||
|
||||
/** number of newlines encountered up to the start of the matched text */
|
||||
private int yyline;
|
||||
|
||||
/** the number of characters up to the start of the matched text */
|
||||
private int yychar;
|
||||
|
||||
/**
|
||||
* the number of characters from the last newline up to the start of the
|
||||
* matched text
|
||||
*/
|
||||
private int yycolumn;
|
||||
|
||||
/**
|
||||
* zzAtBOL == true <=> the scanner is currently at the beginning of a line
|
||||
*/
|
||||
private boolean zzAtBOL = true;
|
||||
|
||||
/** zzAtEOF == true <=> the scanner is at the EOF */
|
||||
private boolean zzAtEOF;
|
||||
|
||||
/** denotes if the user-EOF-code has already been executed */
|
||||
private boolean zzEOFDone;
|
||||
|
||||
/**
|
||||
* The number of occupied positions in zzBuffer beyond zzEndRead.
|
||||
* When a lead/high surrogate has been read from the input stream
|
||||
* into the final zzBuffer position, this will have a value of 1;
|
||||
* otherwise, it will have a value of 0.
|
||||
*/
|
||||
private int zzFinalHighSurrogate = 0;
|
||||
|
||||
/* user code: */
|
||||
private int intvalue=0;
|
||||
private String textvalue ="";
|
||||
private int fracvalue=0;
|
||||
private int fraclength=0;
|
||||
private int expvalue=0;
|
||||
private int expsign=1;
|
||||
private int startline =0;
|
||||
private int startcolumn =0;
|
||||
private String stringvalue="";
|
||||
|
||||
|
||||
/**
|
||||
* Creates a new scanner
|
||||
*
|
||||
* @param in the java.io.Reader to read input from.
|
||||
*/
|
||||
public JFlexXScanner(java.io.Reader in) {
|
||||
this.zzReader = in;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Unpacks the compressed character translation table.
|
||||
*
|
||||
* @param packed the packed character translation table
|
||||
* @return the unpacked character translation table
|
||||
*/
|
||||
private static char [] zzUnpackCMap(String packed) {
|
||||
char [] map = new char[0x110000];
|
||||
int i = 0; /* index in packed string */
|
||||
int j = 0; /* index in unpacked array */
|
||||
while (i < 140) {
|
||||
int count = packed.charAt(i++);
|
||||
char value = packed.charAt(i++);
|
||||
do map[j++] = value; while (--count > 0);
|
||||
}
|
||||
return map;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Refills the input buffer.
|
||||
*
|
||||
* @return <code>false</code>, iff there was new input.
|
||||
*
|
||||
* @exception java.io.IOException if any I/O-Error occurs
|
||||
*/
|
||||
private boolean zzRefill() throws java.io.IOException {
|
||||
|
||||
/* first: make room (if you can) */
|
||||
if (zzStartRead > 0) {
|
||||
zzEndRead += zzFinalHighSurrogate;
|
||||
zzFinalHighSurrogate = 0;
|
||||
System.arraycopy(zzBuffer, zzStartRead,
|
||||
zzBuffer, 0,
|
||||
zzEndRead-zzStartRead);
|
||||
|
||||
/* translate stored positions */
|
||||
zzEndRead-= zzStartRead;
|
||||
zzCurrentPos-= zzStartRead;
|
||||
zzMarkedPos-= zzStartRead;
|
||||
zzStartRead = 0;
|
||||
}
|
||||
|
||||
/* is the buffer big enough? */
|
||||
if (zzCurrentPos >= zzBuffer.length - zzFinalHighSurrogate) {
|
||||
/* if not: blow it up */
|
||||
char newBuffer[] = new char[zzBuffer.length*2];
|
||||
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
|
||||
zzBuffer = newBuffer;
|
||||
zzEndRead += zzFinalHighSurrogate;
|
||||
zzFinalHighSurrogate = 0;
|
||||
}
|
||||
|
||||
/* fill the buffer with new input */
|
||||
int requested = zzBuffer.length - zzEndRead;
|
||||
int numRead = zzReader.read(zzBuffer, zzEndRead, requested);
|
||||
|
||||
/* not supposed to occur according to specification of java.io.Reader */
|
||||
if (numRead == 0) {
|
||||
throw new java.io.IOException("Reader returned 0 characters. See JFlex examples for workaround.");
|
||||
}
|
||||
if (numRead > 0) {
|
||||
zzEndRead += numRead;
|
||||
/* If numRead == requested, we might have requested to few chars to
|
||||
encode a full Unicode character. We assume that a Reader would
|
||||
otherwise never return half characters. */
|
||||
if (numRead == requested) {
|
||||
if (Character.isHighSurrogate(zzBuffer[zzEndRead - 1])) {
|
||||
--zzEndRead;
|
||||
zzFinalHighSurrogate = 1;
|
||||
}
|
||||
}
|
||||
/* potentially more input available */
|
||||
return false;
|
||||
}
|
||||
|
||||
/* numRead < 0 ==> end of stream */
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Closes the input stream.
|
||||
*/
|
||||
public final void yyclose() throws java.io.IOException {
|
||||
zzAtEOF = true; /* indicate end of file */
|
||||
zzEndRead = zzStartRead; /* invalidate buffer */
|
||||
|
||||
if (zzReader != null)
|
||||
zzReader.close();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Resets the scanner to read from a new input stream.
|
||||
* Does not close the old reader.
|
||||
*
|
||||
* All internal variables are reset, the old input stream
|
||||
* <b>cannot</b> be reused (internal buffer is discarded and lost).
|
||||
* Lexical state is set to <tt>ZZ_INITIAL</tt>.
|
||||
*
|
||||
* Internal scan buffer is resized down to its initial length, if it has grown.
|
||||
*
|
||||
* @param reader the new input stream
|
||||
*/
|
||||
public final void yyreset(java.io.Reader reader) {
|
||||
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;
|
||||
switch (zzLexicalState) {
|
||||
case INT: {
|
||||
yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new IntConstToken(Token.INTCONST, textvalue, startline, startcolumn, intvalue);
|
||||
}
|
||||
case 104: break;
|
||||
case FRACTION: {
|
||||
yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength));
|
||||
}
|
||||
case 105: break;
|
||||
case EXPVZ: {
|
||||
yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new Token(Token.INVALID, textvalue, startline, startcolumn);
|
||||
}
|
||||
case 106: break;
|
||||
case EXP: {
|
||||
yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn, (intvalue+fracvalue/Math.pow(10,fraclength))*Math.pow(10,expvalue*expsign));
|
||||
}
|
||||
case 107: break;
|
||||
case STRING: {
|
||||
yybegin(YYINITIAL); return new Token(Token.INVALID, textvalue, startline, startcolumn);
|
||||
}
|
||||
case 108: break;
|
||||
default:
|
||||
{
|
||||
return new Token(Token.EOF, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
switch (zzAction < 0 ? zzAction : ZZ_ACTION[zzAction]) {
|
||||
case 1:
|
||||
{ return new Token(Token.INVALID, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 52: break;
|
||||
case 2:
|
||||
{ return new Token(Token.ID, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 53: break;
|
||||
case 3:
|
||||
{ return new Token(Token.PLUS, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 54: break;
|
||||
case 4:
|
||||
{ return new Token(Token.MINUS, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 55: break;
|
||||
case 5:
|
||||
{ return new Token(Token.MULT, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 56: break;
|
||||
case 6:
|
||||
{ return new Token(Token.DIV, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 57: break;
|
||||
case 7:
|
||||
{ return new Token(Token.COLON, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 58: break;
|
||||
case 8:
|
||||
{ return new Token(Token.EQUALS, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 59: break;
|
||||
case 9:
|
||||
{ return new Token(Token.LBR, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 60: break;
|
||||
case 10:
|
||||
{ return new Token(Token.RBR, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 61: break;
|
||||
case 11:
|
||||
{ return new Token(Token.LESS, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 62: break;
|
||||
case 12:
|
||||
{ return new Token(Token.MORE, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 63: break;
|
||||
case 13:
|
||||
{ return new Token(Token.SEMICOLON, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 64: break;
|
||||
case 14:
|
||||
{ return new Token(Token.DOT, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 65: break;
|
||||
case 15:
|
||||
{ yybegin(INT); textvalue=yytext(); startline=yyline+1; startcolumn=yycolumn+1;
|
||||
intvalue=yytext().charAt(0)-'0'; fracvalue=0; fraclength=0; expvalue=0;
|
||||
}
|
||||
case 66: break;
|
||||
case 16:
|
||||
{ return new IntConstToken(Token.INTCONST, yytext(), yyline+1, yycolumn+1, 0);
|
||||
}
|
||||
case 67: break;
|
||||
case 17:
|
||||
{ yybegin(STRING); textvalue="\""; stringvalue=""; startline=yyline+1; startcolumn=yycolumn+1;
|
||||
}
|
||||
case 68: break;
|
||||
case 18:
|
||||
{ /* eat whitespace */
|
||||
}
|
||||
case 69: break;
|
||||
case 19:
|
||||
{ yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new IntConstToken(Token.INTCONST, textvalue, startline, startcolumn, intvalue);
|
||||
}
|
||||
case 70: break;
|
||||
case 20:
|
||||
{ yybegin(FRACTION);
|
||||
textvalue+=yytext();
|
||||
}
|
||||
case 71: break;
|
||||
case 21:
|
||||
{ intvalue = 10*intvalue + yytext().charAt(0)-'0';
|
||||
textvalue+=yytext();
|
||||
}
|
||||
case 72: break;
|
||||
case 22:
|
||||
{ yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength));
|
||||
}
|
||||
case 73: break;
|
||||
case 23:
|
||||
{ fracvalue= 10*fracvalue+ yytext().charAt(0)-'0';
|
||||
fraclength++;
|
||||
textvalue+=yytext();
|
||||
}
|
||||
case 74: break;
|
||||
case 24:
|
||||
{ yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new Token(Token.INVALID, textvalue, startline, startcolumn);
|
||||
}
|
||||
case 75: break;
|
||||
case 25:
|
||||
{ yybegin(EXP); expvalue=yytext().charAt(0)-'0'; expsign=1; textvalue+=yytext();
|
||||
}
|
||||
case 76: break;
|
||||
case 26:
|
||||
{ yybegin(YYINITIAL);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue+yytext(), startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength));
|
||||
}
|
||||
case 77: break;
|
||||
case 27:
|
||||
{ yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn, (intvalue+fracvalue/Math.pow(10,fraclength))*Math.pow(10,expvalue*expsign));
|
||||
}
|
||||
case 78: break;
|
||||
case 28:
|
||||
{ expvalue = 10* expvalue + yytext().charAt(0)-'0'; textvalue+=yytext();
|
||||
}
|
||||
case 79: break;
|
||||
case 29:
|
||||
{ yybegin(YYINITIAL); return new Token(Token.INVALID, textvalue+yytext(), startline, startcolumn);
|
||||
}
|
||||
case 80: break;
|
||||
case 30:
|
||||
{ textvalue+=yytext(); stringvalue+=yytext();
|
||||
}
|
||||
case 81: break;
|
||||
case 31:
|
||||
{ yybegin(YYINITIAL); return new StringConstToken(Token.STRINGCONST, textvalue+"\"", startline, startcolumn, stringvalue);
|
||||
}
|
||||
case 82: break;
|
||||
case 32:
|
||||
{ return new Token(Token.IF, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 83: break;
|
||||
case 33:
|
||||
{ return new Token(Token.ASSIGN, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 84: break;
|
||||
case 34:
|
||||
// lookahead expression with fixed base length
|
||||
zzMarkedPos = Character.offsetByCodePoints
|
||||
(zzBufferL, zzStartRead, zzEndRead - zzStartRead, zzStartRead, 1);
|
||||
{ yybegin(INT); textvalue=yytext(); startline=yyline+1; startcolumn=yycolumn+1;
|
||||
intvalue=yytext().charAt(0)-'0'; fracvalue=0; fraclength=0; expvalue=0;
|
||||
}
|
||||
case 85: break;
|
||||
case 35:
|
||||
// lookahead expression with fixed base length
|
||||
zzMarkedPos = Character.offsetByCodePoints
|
||||
(zzBufferL, zzStartRead, zzEndRead - zzStartRead, zzStartRead, 1);
|
||||
{ yybegin(EXPVZ); textvalue += yytext();
|
||||
}
|
||||
case 86: break;
|
||||
case 36:
|
||||
// lookahead expression with fixed base length
|
||||
zzMarkedPos = Character.offsetByCodePoints
|
||||
(zzBufferL, zzStartRead, zzEndRead - zzStartRead, zzStartRead, 1);
|
||||
{ yybegin(EXPVZ);
|
||||
textvalue+=yytext();
|
||||
}
|
||||
case 87: break;
|
||||
case 37:
|
||||
{ yybegin(EXP); expvalue=yytext().charAt(1)-'0'; expsign=-1; textvalue+=yytext();
|
||||
}
|
||||
case 88: break;
|
||||
case 38:
|
||||
{ textvalue+="\\\""; stringvalue+="\"";
|
||||
}
|
||||
case 89: break;
|
||||
case 39:
|
||||
{ return new Token(Token.END, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 90: break;
|
||||
case 40:
|
||||
{ return new Token(Token.INT, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 91: break;
|
||||
case 41:
|
||||
{ return new Token(Token.FOR, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 92: break;
|
||||
case 42:
|
||||
{ return new Token(Token.READ, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 93: break;
|
||||
case 43:
|
||||
{ return new Token(Token.ELSE, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 94: break;
|
||||
case 44:
|
||||
{ return new Token(Token.THEN, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 95: break;
|
||||
case 45:
|
||||
{ /* eat comments */
|
||||
}
|
||||
case 96: break;
|
||||
case 46:
|
||||
{ return new Token(Token.PRINT, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 97: break;
|
||||
case 47:
|
||||
{ return new Token(Token.FLOAT, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 98: break;
|
||||
case 48:
|
||||
{ return new Token(Token.WHILE, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 99: break;
|
||||
case 49:
|
||||
{ return new Token(Token.BEGIN, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 100: break;
|
||||
case 50:
|
||||
{ return new Token(Token.STRING, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 101: break;
|
||||
case 51:
|
||||
{ return new Token(Token.PROGRAM, yytext(), yyline+1, yycolumn+1);
|
||||
}
|
||||
case 102: break;
|
||||
default:
|
||||
zzScanError(ZZ_NO_MATCH);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
@@ -0,0 +1,148 @@
|
||||
/* **********************************************
|
||||
* Duale Hochschule Baden-Württemberg Karlsruhe
|
||||
* Prof. Dr. Jörn Eisenbiegler
|
||||
*
|
||||
* Vorlesung Übersetzerbau
|
||||
* Praxis X Abstiegsparser
|
||||
* - Scanner-Definition
|
||||
*
|
||||
* **********************************************
|
||||
*/
|
||||
|
||||
|
||||
package de.dhbw.compiler.xparser;
|
||||
|
||||
%%
|
||||
|
||||
%class JFlexXScanner
|
||||
%type Token
|
||||
%function nextToken
|
||||
|
||||
|
||||
%unicode
|
||||
%line
|
||||
%column
|
||||
|
||||
%public
|
||||
%final
|
||||
|
||||
%xstate INT, FRACTION, EXPVZ, EXP, STRING
|
||||
|
||||
%{
|
||||
private int intvalue=0;
|
||||
private String textvalue ="";
|
||||
private int fracvalue=0;
|
||||
private int fraclength=0;
|
||||
private int expvalue=0;
|
||||
private int expsign=1;
|
||||
private int startline =0;
|
||||
private int startcolumn =0;
|
||||
private String stringvalue="";
|
||||
%}
|
||||
|
||||
|
||||
|
||||
%%
|
||||
|
||||
read { return new Token(Token.READ, yytext(), yyline+1, yycolumn+1); }
|
||||
print { return new Token(Token.PRINT, yytext(), yyline+1, yycolumn+1); }
|
||||
int { return new Token(Token.INT, yytext(), yyline+1, yycolumn+1); }
|
||||
float { return new Token(Token.FLOAT, yytext(), yyline+1, yycolumn+1); }
|
||||
string { return new Token(Token.STRING, yytext(), yyline+1, yycolumn+1); }
|
||||
\+ { return new Token(Token.PLUS, yytext(), yyline+1, yycolumn+1); }
|
||||
\- { return new Token(Token.MINUS, yytext(), yyline+1, yycolumn+1); }
|
||||
\* { return new Token(Token.MULT, yytext(), yyline+1, yycolumn+1); }
|
||||
\/ { return new Token(Token.DIV, yytext(), yyline+1, yycolumn+1); }
|
||||
:= { return new Token(Token.ASSIGN, yytext(), yyline+1, yycolumn+1); }
|
||||
\( { return new Token(Token.LBR, yytext(), yyline+1, yycolumn+1); }
|
||||
\) { return new Token(Token.RBR, yytext(), yyline+1, yycolumn+1); }
|
||||
\< { return new Token(Token.LESS, yytext(), yyline+1, yycolumn+1); }
|
||||
> { return new Token(Token.MORE, yytext(), yyline+1, yycolumn+1); }
|
||||
= { return new Token(Token.EQUALS, yytext(), yyline+1, yycolumn+1); }
|
||||
if { return new Token(Token.IF, yytext(), yyline+1, yycolumn+1); }
|
||||
then { return new Token(Token.THEN, yytext(), yyline+1, yycolumn+1); }
|
||||
else { return new Token(Token.ELSE, yytext(), yyline+1, yycolumn+1); }
|
||||
while { return new Token(Token.WHILE, yytext(), yyline+1, yycolumn+1); }
|
||||
for { return new Token(Token.FOR, yytext(), yyline+1, yycolumn+1); }
|
||||
; { return new Token(Token.SEMICOLON, yytext(), yyline+1, yycolumn+1); }
|
||||
begin { return new Token(Token.BEGIN, yytext(), yyline+1, yycolumn+1); }
|
||||
end { return new Token(Token.END, yytext(), yyline+1, yycolumn+1); }
|
||||
program { return new Token(Token.PROGRAM, yytext(), yyline+1, yycolumn+1); }
|
||||
\. { return new Token(Token.DOT, yytext(), yyline+1, yycolumn+1); }
|
||||
: { return new Token(Token.COLON, yytext(), yyline+1, yycolumn+1); }
|
||||
|
||||
|
||||
[a-zA-Z][a-zA-Z0-9]* { return new Token(Token.ID, yytext(), yyline+1, yycolumn+1); }
|
||||
|
||||
0 { return new IntConstToken(Token.INTCONST, yytext(), yyline+1, yycolumn+1, 0); }
|
||||
0/\. { yybegin(INT); textvalue=yytext(); startline=yyline+1; startcolumn=yycolumn+1;
|
||||
intvalue=yytext().charAt(0)-'0'; fracvalue=0; fraclength=0; expvalue=0; }
|
||||
[1-9] { yybegin(INT); textvalue=yytext(); startline=yyline+1; startcolumn=yycolumn+1;
|
||||
intvalue=yytext().charAt(0)-'0'; fracvalue=0; fraclength=0; expvalue=0; }
|
||||
|
||||
\" { yybegin(STRING); textvalue="\""; stringvalue=""; startline=yyline+1; startcolumn=yycolumn+1; }
|
||||
|
||||
(\/\*)~(\*\/) { /* eat comments */ }
|
||||
[\ \t\b\f\r\n]+ { /* eat whitespace */ }
|
||||
<<EOF>> { return new Token(Token.EOF, yytext(), yyline+1, yycolumn+1); }
|
||||
[^] { return new Token(Token.INVALID, yytext(), yyline+1, yycolumn+1); }
|
||||
|
||||
<STRING> {
|
||||
[a-zA-Z \.:] { textvalue+=yytext(); stringvalue+=yytext(); }
|
||||
\\\" { textvalue+="\\\""; stringvalue+="\""; }
|
||||
\" { yybegin(YYINITIAL); return new StringConstToken(Token.STRINGCONST, textvalue+"\"", startline, startcolumn, stringvalue); }
|
||||
[^] { yybegin(YYINITIAL); return new Token(Token.INVALID, textvalue+yytext(), startline, startcolumn); }
|
||||
<<EOF>> { yybegin(YYINITIAL); return new Token(Token.INVALID, textvalue, startline, startcolumn); }
|
||||
}
|
||||
|
||||
<INT> {
|
||||
[0-9] { intvalue = 10*intvalue + yytext().charAt(0)-'0';
|
||||
textvalue+=yytext();}
|
||||
\. { yybegin(FRACTION);
|
||||
textvalue+=yytext();}
|
||||
[eE]/-?[0-9] { yybegin(EXPVZ); textvalue += yytext(); }
|
||||
[^] { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new IntConstToken(Token.INTCONST, textvalue, startline, startcolumn, intvalue); }
|
||||
<<EOF>> { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new IntConstToken(Token.INTCONST, textvalue, startline, startcolumn, intvalue);}
|
||||
}
|
||||
|
||||
<FRACTION> {
|
||||
[0-9] { fracvalue= 10*fracvalue+ yytext().charAt(0)-'0';
|
||||
fraclength++;
|
||||
textvalue+=yytext();}
|
||||
[eE]/-?[0-9] { yybegin(EXPVZ);
|
||||
textvalue+=yytext();}
|
||||
[^] { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength)); }
|
||||
<<EOF>> { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength)); }
|
||||
}
|
||||
|
||||
<EXPVZ> {
|
||||
-0|0 { yybegin(YYINITIAL);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue+yytext(), startline, startcolumn,intvalue+fracvalue/Math.pow(10,fraclength)); }
|
||||
-[1-9] { yybegin(EXP); expvalue=yytext().charAt(1)-'0'; expsign=-1; textvalue+=yytext(); }
|
||||
[1-9] { yybegin(EXP); expvalue=yytext().charAt(0)-'0'; expsign=1; textvalue+=yytext(); }
|
||||
[^] { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new Token(Token.INVALID, textvalue, startline, startcolumn); }
|
||||
<<EOF>> { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new Token(Token.INVALID, textvalue, startline, startcolumn); }
|
||||
}
|
||||
|
||||
<EXP> {
|
||||
[0-9] { expvalue = 10* expvalue + yytext().charAt(0)-'0'; textvalue+=yytext(); }
|
||||
[^] { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn, (intvalue+fracvalue/Math.pow(10,fraclength))*Math.pow(10,expvalue*expsign)); }
|
||||
<<EOF>> { yybegin(YYINITIAL);
|
||||
yypushback(1);
|
||||
return new FloatConstToken(Token.FLOATCONST, textvalue, startline, startcolumn, (intvalue+fracvalue/Math.pow(10,fraclength))*Math.pow(10,expvalue*expsign)); }
|
||||
}
|
||||
|
||||
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BIN
ÜB-Praxis-Abstiegsparser für X-Leer/lib/hamcrest-all-1.3.jar
Normal file
BIN
ÜB-Praxis-Abstiegsparser für X-Leer/lib/hamcrest-all-1.3.jar
Normal file
Binary file not shown.
@@ -12,15 +12,163 @@
|
||||
package de.dhbw.compiler.xparser;
|
||||
|
||||
public class XParser {
|
||||
|
||||
private final TokenReader in;
|
||||
|
||||
public XParser(TokenReader in) {
|
||||
//TODO Initialization
|
||||
this.in = in;
|
||||
}
|
||||
|
||||
public Tree parseProgram() {
|
||||
//TODO Parser
|
||||
int oldPosition = in.getPosition();
|
||||
Tree program, id, semicolon, block, dot, eof;
|
||||
|
||||
if ((program = parseToken(Token.PROGRAM)) != null
|
||||
&& ((id = parseToken(Token.ID)) != null)
|
||||
&& ((semicolon = parseToken(Token.SEMICOLON)) != null)
|
||||
&& ((block = parseBlock()) != null)
|
||||
&& ((dot = parseToken(Token.DOT)) != null)
|
||||
&& ((eof = parseToken(Token.EOF)) != null)) {
|
||||
Tree tree = new Tree(new Token(Token.APROGRAM));
|
||||
tree.addLastChild(program);
|
||||
tree.addLastChild(id);
|
||||
tree.addLastChild(semicolon);
|
||||
tree.addLastChild(block);
|
||||
tree.addLastChild(dot);
|
||||
tree.addLastChild(eof);
|
||||
|
||||
return tree;
|
||||
}
|
||||
|
||||
System.out.println("> Skipping Tree");
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseBlock() {
|
||||
int oldPosition = in.getPosition();
|
||||
|
||||
Tree begin, statList, end;
|
||||
if ((begin = parseToken(Token.BEGIN)) != null
|
||||
&& (statList = parseStatList()) != null
|
||||
&& (end = parseToken(Token.END)) != null) {
|
||||
Tree tree = new Tree(new Token(Token.BLOCK));
|
||||
tree.addFirstChild(begin);
|
||||
tree.addLastChild(statList);
|
||||
tree.addLastChild(end);
|
||||
|
||||
return tree;
|
||||
}
|
||||
|
||||
System.out.println("parseBlock> Skipping Tree");
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseStatList() {
|
||||
// int oldPosition = in.getPosition();
|
||||
Tree tree = new Tree(new Token(Token.STATLIST));
|
||||
Tree stat;
|
||||
|
||||
while ((stat = parseStatWithSemicolon()) != null) {
|
||||
tree.addLastChild(stat);
|
||||
}
|
||||
|
||||
// if ((block = parseBlock()) != null) {
|
||||
// tree.addFirstChild(new Tree(new Token(Token.STATWITHSEMI)));
|
||||
// tree.addFirstChild(block);
|
||||
// tree.addLastChild(new Tree(new Token(Token.SEMICOLON)));
|
||||
//
|
||||
// return tree;
|
||||
// }
|
||||
|
||||
// in.setPosition(oldPosition);
|
||||
return tree;
|
||||
}
|
||||
|
||||
private Tree parseStatWithSemicolon() {
|
||||
int oldPosition = in.getPosition();
|
||||
Tree tree = new Tree(new Token(Token.STATWITHSEMI));
|
||||
Tree state, semicolon;
|
||||
|
||||
if (((state = parseStat()) != null)
|
||||
&& ((semicolon = parseToken(Token.SEMICOLON)) != null)) {
|
||||
tree.addLastChild(state);
|
||||
tree.addLastChild(semicolon);
|
||||
return tree;
|
||||
}
|
||||
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseStat() {
|
||||
int oldPosition = in.getPosition();
|
||||
Tree tree = new Tree(new Token(Token.STAT));
|
||||
Tree numAssign, condStat, block;
|
||||
|
||||
if ((numAssign = parseNumAssign()) != null) {
|
||||
tree.addLastChild(numAssign);
|
||||
return tree;
|
||||
}
|
||||
|
||||
in.setPosition(oldPosition);
|
||||
if ((condStat = parseCondStat()) != null) {
|
||||
tree.addLastChild(condStat);
|
||||
return tree;
|
||||
}
|
||||
|
||||
in.setPosition(oldPosition);
|
||||
if ((block = parseBlock()) != null) {
|
||||
tree.addLastChild(block);
|
||||
return tree;
|
||||
}
|
||||
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseCondStat() {
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseNumAssign() {
|
||||
int oldPosition = in.getPosition();
|
||||
Tree tree = new Tree(new Token(Token.ASSIGNSTAT));
|
||||
Tree id, assign, numExpr;
|
||||
|
||||
if ((id = parseToken(Token.ID)) != null
|
||||
&& (assign = parseToken(Token.ASSIGN)) != null
|
||||
&& (numExpr = parseNumExpr()) != null) {
|
||||
tree.addLastChild(id);
|
||||
tree.addLastChild(assign);
|
||||
tree.addLastChild(numExpr);
|
||||
return tree;
|
||||
}
|
||||
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseNumExpr() {
|
||||
int oldPosition = in.getPosition();
|
||||
Tree tree = new Tree(new Token(Token.EXPR));
|
||||
|
||||
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
private Tree parseToken(int tokenType) {
|
||||
int oldPosition = in.getPosition();
|
||||
Token nextToken = in.nextToken();
|
||||
System.out.println("parseToken> " + nextToken);
|
||||
if (nextToken.getType() == tokenType) {
|
||||
return new Tree(nextToken);
|
||||
} else {
|
||||
// Reset to last position as it needs to be re-read again
|
||||
in.setPosition(oldPosition);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@@ -12,7 +12,7 @@ package de.dhbw.compiler.xparser;
|
||||
|
||||
import java.io.PrintWriter;
|
||||
import java.io.StringReader;
|
||||
|
||||
import java.util.Scanner;
|
||||
|
||||
|
||||
public class XParserMain {
|
||||
@@ -75,7 +75,12 @@ public class XParserMain {
|
||||
//TODO Initialize scanner and parser
|
||||
//TODO Call parser
|
||||
//TODO Output: Tree, count of tokens and comparisons
|
||||
|
||||
StringReader reader = new StringReader(BEISPIELFOLIEN);
|
||||
JFlexXScanner scanner = new JFlexXScanner(reader);
|
||||
TokenReader tokenReader = new TokenReader(scanner);
|
||||
XParser parser = new XParser(tokenReader);
|
||||
|
||||
parser.parseProgram();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@@ -17,5 +17,6 @@
|
||||
<SOURCES />
|
||||
</library>
|
||||
</orderEntry>
|
||||
<orderEntry type="library" name="lib" level="project" />
|
||||
</component>
|
||||
</module>
|
||||
Reference in New Issue
Block a user