Rewrote grammar, implemented two visitors

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/Klang.interp

@@ -1,20 +1,33 @@
 token literal names:
 null
-null
+'print'
+';'
 '*'
+'+'
+'-'
+'%'
+null
 null
 
 token symbolic names:
 null
-INTEGER_LITERAL
+PRINT
+SCOL
 MULT
+ADD
+SUB
+MOD
+INTEGER_LITERAL
 WS
 
 rule names:
 parse
-multiplicativeExpr
+block
-unaryExpression
+statement
+print
+expression
+atom
 
 
 atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 5, 21, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 7, 3, 14, 10, 3, 12, 3, 14, 3, 17, 11, 3, 3, 4, 3, 4, 3, 4, 2, 2, 5, 2, 4, 6, 2, 2, 2, 18, 2, 8, 3, 2, 2, 2, 4, 10, 3, 2, 2, 2, 6, 18, 3, 2, 2, 2, 8, 9, 5, 4, 3, 2, 9, 3, 3, 2, 2, 2, 10, 15, 5, 6, 4, 2, 11, 12, 7, 4, 2, 2, 12, 14, 5, 6, 4, 2, 13, 11, 3, 2, 2, 2, 14, 17, 3, 2, 2, 2, 15, 13, 3, 2, 2, 2, 15, 16, 3, 2, 2, 2, 16, 5, 3, 2, 2, 2, 17, 15, 3, 2, 2, 2, 18, 19, 7, 3, 2, 2, 19, 7, 3, 2, 2, 2, 3, 15]
+[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 10, 47, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 3, 2, 3, 2, 3, 3, 7, 3, 18, 10, 3, 12, 3, 14, 3, 21, 11, 3, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 3, 6, 5, 6, 43, 10, 6, 3, 7, 3, 7, 3, 7, 2, 2, 8, 2, 4, 6, 8, 10, 12, 2, 3, 3, 2, 6, 7, 2, 44, 2, 14, 3, 2, 2, 2, 4, 19, 3, 2, 2, 2, 6, 22, 3, 2, 2, 2, 8, 24, 3, 2, 2, 2, 10, 42, 3, 2, 2, 2, 12, 44, 3, 2, 2, 2, 14, 15, 5, 4, 3, 2, 15, 3, 3, 2, 2, 2, 16, 18, 5, 6, 4, 2, 17, 16, 3, 2, 2, 2, 18, 21, 3, 2, 2, 2, 19, 17, 3, 2, 2, 2, 19, 20, 3, 2, 2, 2, 20, 5, 3, 2, 2, 2, 21, 19, 3, 2, 2, 2, 22, 23, 5, 8, 5, 2, 23, 7, 3, 2, 2, 2, 24, 25, 7, 3, 2, 2, 25, 26, 5, 10, 6, 2, 26, 27, 7, 4, 2, 2, 27, 9, 3, 2, 2, 2, 28, 29, 5, 12, 7, 2, 29, 30, 7, 5, 2, 2, 30, 31, 5, 12, 7, 2, 31, 43, 3, 2, 2, 2, 32, 33, 5, 12, 7, 2, 33, 34, 9, 2, 2, 2, 34, 35, 5, 12, 7, 2, 35, 43, 3, 2, 2, 2, 36, 37, 5, 12, 7, 2, 37, 38, 7, 8, 2, 2, 38, 39, 5, 12, 7, 2, 39, 43, 3, 2, 2, 2, 40, 41, 7, 7, 2, 2, 41, 43, 5, 12, 7, 2, 42, 28, 3, 2, 2, 2, 42, 32, 3, 2, 2, 2, 42, 36, 3, 2, 2, 2, 42, 40, 3, 2, 2, 2, 43, 11, 3, 2, 2, 2, 44, 45, 7, 9, 2, 2, 45, 13, 3, 2, 2, 2, 4, 19, 42]

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/Klang.tokens

@@ -1,4 +1,14 @@
-INTEGER_LITERAL=1
+PRINT=1
-MULT=2
+SCOL=2
-WS=3
+MULT=3
-'*'=2
+ADD=4
+SUB=5
+MOD=6
+INTEGER_LITERAL=7
+WS=8
+'print'=1
+';'=2
+'*'=3
+'+'=4
+'-'=5
+'%'=6

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/KlangLexer.interp

@@ -1,18 +1,33 @@
 token literal names:
 null
-null
+'print'
+';'
 '*'
+'+'
+'-'
+'%'
+null
 null
 
 token symbolic names:
 null
-INTEGER_LITERAL
+PRINT
+SCOL
 MULT
+ADD
+SUB
+MOD
+INTEGER_LITERAL
 WS
 
 rule names:
-INTEGER_LITERAL
+PRINT
+SCOL
 MULT
+ADD
+SUB
+MOD
+INTEGER_LITERAL
 WS
 
 channel names:
@@ -23,4 +38,4 @@ mode names:
 DEFAULT_MODE
 
 atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 5, 20, 8, 1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 3, 2, 6, 2, 11, 10, 2, 13, 2, 14, 2, 12, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 2, 2, 5, 3, 3, 5, 4, 7, 5, 3, 2, 4, 3, 2, 50, 59, 5, 2, 11, 12, 15, 15, 34, 34, 2, 20, 2, 3, 3, 2, 2, 2, 2, 5, 3, 2, 2, 2, 2, 7, 3, 2, 2, 2, 3, 10, 3, 2, 2, 2, 5, 14, 3, 2, 2, 2, 7, 16, 3, 2, 2, 2, 9, 11, 9, 2, 2, 2, 10, 9, 3, 2, 2, 2, 11, 12, 3, 2, 2, 2, 12, 10, 3, 2, 2, 2, 12, 13, 3, 2, 2, 2, 13, 4, 3, 2, 2, 2, 14, 15, 7, 44, 2, 2, 15, 6, 3, 2, 2, 2, 16, 17, 9, 3, 2, 2, 17, 18, 3, 2, 2, 2, 18, 19, 8, 4, 2, 2, 19, 8, 3, 2, 2, 2, 4, 2, 12, 3, 8, 2, 2]
+[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 10, 44, 8, 1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 4, 3, 4, 3, 5, 3, 5, 3, 6, 3, 6, 3, 7, 3, 7, 3, 8, 6, 8, 37, 10, 8, 13, 8, 14, 8, 38, 3, 9, 3, 9, 3, 9, 3, 9, 2, 2, 10, 3, 3, 5, 4, 7, 5, 9, 6, 11, 7, 13, 8, 15, 9, 17, 10, 3, 2, 4, 3, 2, 50, 59, 5, 2, 11, 12, 15, 15, 34, 34, 2, 44, 2, 3, 3, 2, 2, 2, 2, 5, 3, 2, 2, 2, 2, 7, 3, 2, 2, 2, 2, 9, 3, 2, 2, 2, 2, 11, 3, 2, 2, 2, 2, 13, 3, 2, 2, 2, 2, 15, 3, 2, 2, 2, 2, 17, 3, 2, 2, 2, 3, 19, 3, 2, 2, 2, 5, 25, 3, 2, 2, 2, 7, 27, 3, 2, 2, 2, 9, 29, 3, 2, 2, 2, 11, 31, 3, 2, 2, 2, 13, 33, 3, 2, 2, 2, 15, 36, 3, 2, 2, 2, 17, 40, 3, 2, 2, 2, 19, 20, 7, 114, 2, 2, 20, 21, 7, 116, 2, 2, 21, 22, 7, 107, 2, 2, 22, 23, 7, 112, 2, 2, 23, 24, 7, 118, 2, 2, 24, 4, 3, 2, 2, 2, 25, 26, 7, 61, 2, 2, 26, 6, 3, 2, 2, 2, 27, 28, 7, 44, 2, 2, 28, 8, 3, 2, 2, 2, 29, 30, 7, 45, 2, 2, 30, 10, 3, 2, 2, 2, 31, 32, 7, 47, 2, 2, 32, 12, 3, 2, 2, 2, 33, 34, 7, 39, 2, 2, 34, 14, 3, 2, 2, 2, 35, 37, 9, 2, 2, 2, 36, 35, 3, 2, 2, 2, 37, 38, 3, 2, 2, 2, 38, 36, 3, 2, 2, 2, 38, 39, 3, 2, 2, 2, 39, 16, 3, 2, 2, 2, 40, 41, 9, 3, 2, 2, 41, 42, 3, 2, 2, 2, 42, 43, 8, 9, 2, 2, 43, 18, 3, 2, 2, 2, 4, 2, 38, 3, 8, 2, 2]

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/KlangLexer.java

@@ -1,4 +1,4 @@
-// Generated from /home/nitrix/Development/hsrm/cb/klang/src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4 by ANTLR 4.7.1
+// Generated from /home/marvin/Documents/university/compiler/klang/src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4 by ANTLR 4.7.1
 import org.antlr.v4.runtime.Lexer;
 import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.Token;
@@ -16,7 +16,7 @@ public class KlangLexer extends Lexer {
 	protected static final PredictionContextCache _sharedContextCache =
 		new PredictionContextCache();
 	public static final int
-		INTEGER_LITERAL=1, MULT=2, WS=3;
+		PRINT=1, SCOL=2, MULT=3, ADD=4, SUB=5, MOD=6, INTEGER_LITERAL=7, WS=8;
 	public static String[] channelNames = {
 		"DEFAULT_TOKEN_CHANNEL", "HIDDEN"
 	};
@@ -26,14 +26,15 @@ public class KlangLexer extends Lexer {
 	};
 
 	public static final String[] ruleNames = {
-		"INTEGER_LITERAL", "MULT", "WS"
+		"PRINT", "SCOL", "MULT", "ADD", "SUB", "MOD", "INTEGER_LITERAL", "WS"
 	};
 
 	private static final String[] _LITERAL_NAMES = {
-		null, null, "'*'"
+		null, "'print'", "';'", "'*'", "'+'", "'-'", "'%'"
 	};
 	private static final String[] _SYMBOLIC_NAMES = {
-		null, "INTEGER_LITERAL", "MULT", "WS"
+		null, "PRINT", "SCOL", "MULT", "ADD", "SUB", "MOD", "INTEGER_LITERAL", 
+		"WS"
 	};
 	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
 
@@ -93,13 +94,18 @@ public class KlangLexer extends Lexer {
 	public ATN getATN() { return _ATN; }
 
 	public static final String _serializedATN =
-		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\5\24\b\1\4\2\t\2"+
+		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\n,\b\1\4\2\t\2\4"+
-		"\4\3\t\3\4\4\t\4\3\2\6\2\13\n\2\r\2\16\2\f\3\3\3\3\3\4\3\4\3\4\3\4\2\2"+
+		"\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\3\2\3\2\3\2\3\2"+
-		"\5\3\3\5\4\7\5\3\2\4\3\2\62;\5\2\13\f\17\17\"\"\2\24\2\3\3\2\2\2\2\5\3"+
+		"\3\2\3\2\3\3\3\3\3\4\3\4\3\5\3\5\3\6\3\6\3\7\3\7\3\b\6\b%\n\b\r\b\16\b"+
-		"\2\2\2\2\7\3\2\2\2\3\n\3\2\2\2\5\16\3\2\2\2\7\20\3\2\2\2\t\13\t\2\2\2"+
+		"&\3\t\3\t\3\t\3\t\2\2\n\3\3\5\4\7\5\t\6\13\7\r\b\17\t\21\n\3\2\4\3\2\62"+
-		"\n\t\3\2\2\2\13\f\3\2\2\2\f\n\3\2\2\2\f\r\3\2\2\2\r\4\3\2\2\2\16\17\7"+
+		";\5\2\13\f\17\17\"\"\2,\2\3\3\2\2\2\2\5\3\2\2\2\2\7\3\2\2\2\2\t\3\2\2"+
-		",\2\2\17\6\3\2\2\2\20\21\t\3\2\2\21\22\3\2\2\2\22\23\b\4\2\2\23\b\3\2"+
+		"\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2\2\2\2\21\3\2\2\2\3\23\3\2\2\2\5\31"+
-		"\2\2\4\2\f\3\b\2\2";
+		"\3\2\2\2\7\33\3\2\2\2\t\35\3\2\2\2\13\37\3\2\2\2\r!\3\2\2\2\17$\3\2\2"+
+		"\2\21(\3\2\2\2\23\24\7r\2\2\24\25\7t\2\2\25\26\7k\2\2\26\27\7p\2\2\27"+
+		"\30\7v\2\2\30\4\3\2\2\2\31\32\7=\2\2\32\6\3\2\2\2\33\34\7,\2\2\34\b\3"+
+		"\2\2\2\35\36\7-\2\2\36\n\3\2\2\2\37 \7/\2\2 \f\3\2\2\2!\"\7\'\2\2\"\16"+
+		"\3\2\2\2#%\t\2\2\2$#\3\2\2\2%&\3\2\2\2&$\3\2\2\2&\'\3\2\2\2\'\20\3\2\2"+
+		"\2()\t\3\2\2)*\3\2\2\2*+\b\t\2\2+\22\3\2\2\2\4\2&\3\b\2\2";
 	public static final ATN _ATN =
 		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
 	static {

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/KlangLexer.tokens

@@ -1,4 +1,14 @@
-INTEGER_LITERAL=1
+PRINT=1
-MULT=2
+SCOL=2
-WS=3
+MULT=3
-'*'=2
+ADD=4
+SUB=5
+MOD=6
+INTEGER_LITERAL=7
+WS=8
+'print'=1
+';'=2
+'*'=3
+'+'=4
+'-'=5
+'%'=6

src/main/antlr4/de/hsrm/compiler/Klang/.antlr/KlangParser.java

@@ -1,4 +1,4 @@
-// Generated from /home/nitrix/Development/hsrm/cb/klang/src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4 by ANTLR 4.7.1
+// Generated from /home/marvin/Documents/university/compiler/klang/src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4 by ANTLR 4.7.1
 import org.antlr.v4.runtime.atn.*;
 import org.antlr.v4.runtime.dfa.DFA;
 import org.antlr.v4.runtime.*;
@@ -16,18 +16,20 @@ public class KlangParser extends Parser {
 	protected static final PredictionContextCache _sharedContextCache =
 		new PredictionContextCache();
 	public static final int
-		INTEGER_LITERAL=1, MULT=2, WS=3;
+		PRINT=1, SCOL=2, MULT=3, ADD=4, SUB=5, MOD=6, INTEGER_LITERAL=7, WS=8;
 	public static final int
-		RULE_parse = 0, RULE_multiplicativeExpr = 1, RULE_unaryExpression = 2;
+		RULE_parse = 0, RULE_block = 1, RULE_statement = 2, RULE_print = 3, RULE_expression = 4, 
+		RULE_atom = 5;
 	public static final String[] ruleNames = {
-		"parse", "multiplicativeExpr", "unaryExpression"
+		"parse", "block", "statement", "print", "expression", "atom"
 	};
 
 	private static final String[] _LITERAL_NAMES = {
-		null, null, "'*'"
+		null, "'print'", "';'", "'*'", "'+'", "'-'", "'%'"
 	};
 	private static final String[] _SYMBOLIC_NAMES = {
-		null, "INTEGER_LITERAL", "MULT", "WS"
+		null, "PRINT", "SCOL", "MULT", "ADD", "SUB", "MOD", "INTEGER_LITERAL", 
+		"WS"
 	};
 	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
 
@@ -79,8 +81,8 @@ public class KlangParser extends Parser {
 		_interp = new ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
 	}
 	public static class ParseContext extends ParserRuleContext {
-		public MultiplicativeExprContext multiplicativeExpr() {
+		public BlockContext block() {
-			return getRuleContext(MultiplicativeExprContext.class,0);
+			return getRuleContext(BlockContext.class,0);
 		}
 		public ParseContext(ParserRuleContext parent, int invokingState) {
 			super(parent, invokingState);
@@ -94,8 +96,8 @@ public class KlangParser extends Parser {
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(6);
+			setState(12);
-			multiplicativeExpr();
+			block();
 			}
 		}
 		catch (RecognitionException re) {
@@ -109,45 +111,37 @@ public class KlangParser extends Parser {
 		return _localctx;
 	}
 
-	public static class MultiplicativeExprContext extends ParserRuleContext {
+	public static class BlockContext extends ParserRuleContext {
-		public List<UnaryExpressionContext> unaryExpression() {
+		public List<StatementContext> statement() {
-			return getRuleContexts(UnaryExpressionContext.class);
+			return getRuleContexts(StatementContext.class);
 		}
-		public UnaryExpressionContext unaryExpression(int i) {
+		public StatementContext statement(int i) {
-			return getRuleContext(UnaryExpressionContext.class,i);
+			return getRuleContext(StatementContext.class,i);
 		}
-		public List<TerminalNode> MULT() { return getTokens(KlangParser.MULT); }
+		public BlockContext(ParserRuleContext parent, int invokingState) {
-		public TerminalNode MULT(int i) {
-			return getToken(KlangParser.MULT, i);
-		}
-		public MultiplicativeExprContext(ParserRuleContext parent, int invokingState) {
 			super(parent, invokingState);
 		}
-		@Override public int getRuleIndex() { return RULE_multiplicativeExpr; }
+		@Override public int getRuleIndex() { return RULE_block; }
 	}
 
-	public final MultiplicativeExprContext multiplicativeExpr() throws RecognitionException {
+	public final BlockContext block() throws RecognitionException {
-		MultiplicativeExprContext _localctx = new MultiplicativeExprContext(_ctx, getState());
+		BlockContext _localctx = new BlockContext(_ctx, getState());
-		enterRule(_localctx, 2, RULE_multiplicativeExpr);
+		enterRule(_localctx, 2, RULE_block);
 		int _la;
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(8);
+			setState(17);
-			unaryExpression();
-			setState(13);
 			_errHandler.sync(this);
 			_la = _input.LA(1);
-			while (_la==MULT) {
+			while (_la==PRINT) {
 				{
 				{
-				setState(9);
+				setState(14);
-				match(MULT);
+				statement();
-				setState(10);
-				unaryExpression();
 				}
 				}
-				setState(15);
+				setState(19);
 				_errHandler.sync(this);
 				_la = _input.LA(1);
 			}
@@ -164,21 +158,225 @@ public class KlangParser extends Parser {
 		return _localctx;
 	}
 
-	public static class UnaryExpressionContext extends ParserRuleContext {
+	public static class StatementContext extends ParserRuleContext {
-		public TerminalNode INTEGER_LITERAL() { return getToken(KlangParser.INTEGER_LITERAL, 0); }
+		public PrintContext print() {
-		public UnaryExpressionContext(ParserRuleContext parent, int invokingState) {
+			return getRuleContext(PrintContext.class,0);
+		}
+		public StatementContext(ParserRuleContext parent, int invokingState) {
 			super(parent, invokingState);
 		}
-		@Override public int getRuleIndex() { return RULE_unaryExpression; }
+		@Override public int getRuleIndex() { return RULE_statement; }
 	}
 
-	public final UnaryExpressionContext unaryExpression() throws RecognitionException {
+	public final StatementContext statement() throws RecognitionException {
-		UnaryExpressionContext _localctx = new UnaryExpressionContext(_ctx, getState());
+		StatementContext _localctx = new StatementContext(_ctx, getState());
-		enterRule(_localctx, 4, RULE_unaryExpression);
+		enterRule(_localctx, 4, RULE_statement);
 		try {
 			enterOuterAlt(_localctx, 1);
 			{
-			setState(16);
+			setState(20);
+			print();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class PrintContext extends ParserRuleContext {
+		public TerminalNode PRINT() { return getToken(KlangParser.PRINT, 0); }
+		public ExpressionContext expression() {
+			return getRuleContext(ExpressionContext.class,0);
+		}
+		public TerminalNode SCOL() { return getToken(KlangParser.SCOL, 0); }
+		public PrintContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_print; }
+	}
+
+	public final PrintContext print() throws RecognitionException {
+		PrintContext _localctx = new PrintContext(_ctx, getState());
+		enterRule(_localctx, 6, RULE_print);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(22);
+			match(PRINT);
+			setState(23);
+			expression();
+			setState(24);
+			match(SCOL);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class ExpressionContext extends ParserRuleContext {
+		public ExpressionContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_expression; }
+	 
+		public ExpressionContext() { }
+		public void copyFrom(ExpressionContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	public static class AdditiveExpressionContext extends ExpressionContext {
+		public Token op;
+		public List<AtomContext> atom() {
+			return getRuleContexts(AtomContext.class);
+		}
+		public AtomContext atom(int i) {
+			return getRuleContext(AtomContext.class,i);
+		}
+		public TerminalNode ADD() { return getToken(KlangParser.ADD, 0); }
+		public TerminalNode SUB() { return getToken(KlangParser.SUB, 0); }
+		public AdditiveExpressionContext(ExpressionContext ctx) { copyFrom(ctx); }
+	}
+	public static class ModuloExpressionContext extends ExpressionContext {
+		public List<AtomContext> atom() {
+			return getRuleContexts(AtomContext.class);
+		}
+		public AtomContext atom(int i) {
+			return getRuleContext(AtomContext.class,i);
+		}
+		public TerminalNode MOD() { return getToken(KlangParser.MOD, 0); }
+		public ModuloExpressionContext(ExpressionContext ctx) { copyFrom(ctx); }
+	}
+	public static class UnaryNegateExpressionContext extends ExpressionContext {
+		public TerminalNode SUB() { return getToken(KlangParser.SUB, 0); }
+		public AtomContext atom() {
+			return getRuleContext(AtomContext.class,0);
+		}
+		public UnaryNegateExpressionContext(ExpressionContext ctx) { copyFrom(ctx); }
+	}
+	public static class MultiplicationExpressionContext extends ExpressionContext {
+		public List<AtomContext> atom() {
+			return getRuleContexts(AtomContext.class);
+		}
+		public AtomContext atom(int i) {
+			return getRuleContext(AtomContext.class,i);
+		}
+		public TerminalNode MULT() { return getToken(KlangParser.MULT, 0); }
+		public MultiplicationExpressionContext(ExpressionContext ctx) { copyFrom(ctx); }
+	}
+
+	public final ExpressionContext expression() throws RecognitionException {
+		ExpressionContext _localctx = new ExpressionContext(_ctx, getState());
+		enterRule(_localctx, 8, RULE_expression);
+		int _la;
+		try {
+			setState(40);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,1,_ctx) ) {
+			case 1:
+				_localctx = new MultiplicationExpressionContext(_localctx);
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(26);
+				atom();
+				setState(27);
+				match(MULT);
+				setState(28);
+				atom();
+				}
+				break;
+			case 2:
+				_localctx = new AdditiveExpressionContext(_localctx);
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(30);
+				atom();
+				setState(31);
+				((AdditiveExpressionContext)_localctx).op = _input.LT(1);
+				_la = _input.LA(1);
+				if ( !(_la==ADD || _la==SUB) ) {
+					((AdditiveExpressionContext)_localctx).op = (Token)_errHandler.recoverInline(this);
+				}
+				else {
+					if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+					_errHandler.reportMatch(this);
+					consume();
+				}
+				setState(32);
+				atom();
+				}
+				break;
+			case 3:
+				_localctx = new ModuloExpressionContext(_localctx);
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(34);
+				atom();
+				setState(35);
+				match(MOD);
+				setState(36);
+				atom();
+				}
+				break;
+			case 4:
+				_localctx = new UnaryNegateExpressionContext(_localctx);
+				enterOuterAlt(_localctx, 4);
+				{
+				setState(38);
+				match(SUB);
+				setState(39);
+				atom();
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public static class AtomContext extends ParserRuleContext {
+		public AtomContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_atom; }
+	 
+		public AtomContext() { }
+		public void copyFrom(AtomContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	public static class IntAtomContext extends AtomContext {
+		public TerminalNode INTEGER_LITERAL() { return getToken(KlangParser.INTEGER_LITERAL, 0); }
+		public IntAtomContext(AtomContext ctx) { copyFrom(ctx); }
+	}
+
+	public final AtomContext atom() throws RecognitionException {
+		AtomContext _localctx = new AtomContext(_ctx, getState());
+		enterRule(_localctx, 10, RULE_atom);
+		try {
+			_localctx = new IntAtomContext(_localctx);
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(42);
 			match(INTEGER_LITERAL);
 			}
 		}
@@ -194,12 +392,18 @@ public class KlangParser extends Parser {
 	}
 
 	public static final String _serializedATN =
-		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\3\5\25\4\2\t\2\4\3"+
+		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\3\n/\4\2\t\2\4\3\t"+
-		"\t\3\4\4\t\4\3\2\3\2\3\3\3\3\3\3\7\3\16\n\3\f\3\16\3\21\13\3\3\4\3\4\3"+
+		"\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\3\2\3\2\3\3\7\3\22\n\3\f\3\16\3\25"+
-		"\4\2\2\5\2\4\6\2\2\2\22\2\b\3\2\2\2\4\n\3\2\2\2\6\22\3\2\2\2\b\t\5\4\3"+
+		"\13\3\3\4\3\4\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6"+
-		"\2\t\3\3\2\2\2\n\17\5\6\4\2\13\f\7\4\2\2\f\16\5\6\4\2\r\13\3\2\2\2\16"+
+		"\3\6\3\6\3\6\3\6\5\6+\n\6\3\7\3\7\3\7\2\2\b\2\4\6\b\n\f\2\3\3\2\6\7\2"+
-		"\21\3\2\2\2\17\r\3\2\2\2\17\20\3\2\2\2\20\5\3\2\2\2\21\17\3\2\2\2\22\23"+
+		",\2\16\3\2\2\2\4\23\3\2\2\2\6\26\3\2\2\2\b\30\3\2\2\2\n*\3\2\2\2\f,\3"+
-		"\7\3\2\2\23\7\3\2\2\2\3\17";
+		"\2\2\2\16\17\5\4\3\2\17\3\3\2\2\2\20\22\5\6\4\2\21\20\3\2\2\2\22\25\3"+
+		"\2\2\2\23\21\3\2\2\2\23\24\3\2\2\2\24\5\3\2\2\2\25\23\3\2\2\2\26\27\5"+
+		"\b\5\2\27\7\3\2\2\2\30\31\7\3\2\2\31\32\5\n\6\2\32\33\7\4\2\2\33\t\3\2"+
+		"\2\2\34\35\5\f\7\2\35\36\7\5\2\2\36\37\5\f\7\2\37+\3\2\2\2 !\5\f\7\2!"+
+		"\"\t\2\2\2\"#\5\f\7\2#+\3\2\2\2$%\5\f\7\2%&\7\b\2\2&\'\5\f\7\2\'+\3\2"+
+		"\2\2()\7\7\2\2)+\5\f\7\2*\34\3\2\2\2* \3\2\2\2*$\3\2\2\2*(\3\2\2\2+\13"+
+		"\3\2\2\2,-\7\t\2\2-\r\3\2\2\2\4\23*";
 	public static final ATN _ATN =
 		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
 	static {

src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4

@@ -1,25 +1,44 @@
 grammar Klang;
 
 parse
-  : multiplicativeExpr <EOF>
+  : block <EOF>
   ;
 
-multiplicativeExpr
+block
-  : unaryExpression (MULT unaryExpression)*  
+  : statement*
   ;
 
-unaryExpression
+statement
-  : INTEGER_LITERAL
+  : print
   ;
 
+print
+  : PRINT expression SCOL
+  ;
+
+expression
+  : atom MULT atom #multiplicationExpression
+  | atom op=(ADD | SUB) atom #additiveExpression
+  | atom MOD atom #moduloExpression
+  | SUB atom #unaryNegateExpression
+  ;
+
+atom
+  : INTEGER_LITERAL #intAtom
+  ;
+
+PRINT: 'print';
+SCOL: ';';
+
+MULT: '*';
+ADD: '+';
+SUB: '-';
+MOD: '%';
+
 INTEGER_LITERAL
   : [0-9]+
   ;
 
-MULT
-  : '*'
-  ;
-
 WS
  : [ \t\r\n] -> skip
  ;

src/main/java/de/hsrm/compiler/Klang/JSVisitor.java

@@ -0,0 +1,71 @@
+package de.hsrm.compiler.Klang;
+
+public class JSVisitor extends KlangBaseVisitor<Void> {
+  private final StringBuilder sb;
+
+  public JSVisitor(StringBuilder sb) {
+    this.sb = sb;
+  }
+
+  @Override
+  public Void visitStatement(KlangParser.StatementContext ctx) {
+    for (int i = 0; i < ctx.children.size(); i++) {
+      this.visit(ctx.children.get(i));
+      sb.append("\n");
+    }
+    return null;
+  }
+
+  @Override
+  public Void visitPrint(KlangParser.PrintContext ctx) {
+    sb.append("console.log(");
+    this.visit(ctx.expression());
+    sb.append(");");
+    return null;
+  }
+
+  @Override
+  public Void visitMultiplicationExpression(KlangParser.MultiplicationExpressionContext ctx) {
+    this.visit(ctx.atom(0));
+    sb.append(" * ");
+    this.visit(ctx.atom(1));
+    return null;
+  }
+
+  @Override
+  public Void visitAdditiveExpression(KlangParser.AdditiveExpressionContext ctx) {
+    this.visit(ctx.atom(0));
+
+    switch (ctx.op.getType()) {
+    case KlangParser.ADD:
+      sb.append(" + ");
+      break;
+    case KlangParser.SUB:
+      sb.append(" - ");
+      break;
+    }
+    this.visit(ctx.atom(1));
+    return null;
+  }
+
+  @Override
+  public Void visitModuloExpression(KlangParser.ModuloExpressionContext ctx) {
+    this.visit(ctx.atom(0));
+    sb.append(" % ");
+    this.visit(ctx.atom(1));
+    return null;
+  }
+
+  @Override
+  public Void visitUnaryNegateExpression(KlangParser.UnaryNegateExpressionContext ctx) {
+    sb.append("-");
+    this.visit(ctx.atom());
+    return null;
+  }
+
+  @Override
+  public Void visitIntAtom(KlangParser.IntAtomContext ctx) {
+    sb.append(ctx.getText());
+    return null;
+  }
+}

src/main/java/de/hsrm/compiler/Klang/Klang.java

@@ -19,8 +19,9 @@ public class Klang {
     KlangParser parser = new KlangParser(tokens);
 
     ParseTree tree = parser.parse(); // begin parsing at init rule
-    Visitor visitor = new Visitor();
+    StringBuilder sb = new StringBuilder();
-    int result = visitor.visit(tree);
+    JSVisitor visitor = new JSVisitor(sb);
-    System.out.println(result);
+    visitor.visit(tree);
+    System.out.println(sb.toString());
   }
 }

src/main/java/de/hsrm/compiler/Klang/Value.java

@@ -0,0 +1,55 @@
+package de.hsrm.compiler.Klang;
+
+public class Value {
+
+  public static Value VOID = new Value(new Object());
+
+  final Object value;
+
+  public Value(Object value) {
+      this.value = value;
+  }
+
+  public Integer asInteger() {
+    return (Integer)value;
+  }
+
+  public String asString() {
+      return String.valueOf(value);
+  }
+
+  public boolean isDouble() {
+      return value instanceof Double;
+  }
+
+  @Override
+  public int hashCode() {
+
+      if(value == null) {
+          return 0;
+      }
+
+      return this.value.hashCode();
+  }
+
+  @Override
+  public boolean equals(Object o) {
+
+      if(value == o) {
+          return true;
+      }
+
+      if(value == null || o == null || o.getClass() != value.getClass()) {
+          return false;
+      }
+
+      Value that = (Value)o;
+
+      return this.value.equals(that.value);
+  }
+
+  @Override
+  public String toString() {
+      return String.valueOf(value);
+  }
+}

src/main/java/de/hsrm/compiler/Klang/Visitor.java

@@ -1,19 +1,51 @@
 package de.hsrm.compiler.Klang;
 
-public class Visitor extends KlangBaseVisitor<Integer> {
+public class Visitor extends KlangBaseVisitor<Value> {
-    @Override
-    public Integer visitMultiplicativeExpr(KlangParser.MultiplicativeExprContext ctx) {
-        int result = 1;
 
-        for (var expr: ctx.unaryExpression()) {
+  @Override
-            result *= this.visit(expr);
+  public Value visitPrint(KlangParser.PrintContext ctx) {
-        }
+    Value value = this.visit(ctx.expression());
+    System.out.println(value);
+    return value;
+  }
 
-        return result;
+  @Override
+  public Value visitMultiplicationExpression(KlangParser.MultiplicationExpressionContext ctx) {
+    Value left = this.visit(ctx.atom(0));
+    Value right = this.visit(ctx.atom(1));
+    return new Value(left.asInteger() * right.asInteger());
+  }
+
+  @Override
+  public Value visitAdditiveExpression(KlangParser.AdditiveExpressionContext ctx) {
+    Value left = this.visit(ctx.atom(0));
+    Value right = this.visit(ctx.atom(1));
+
+    switch (ctx.op.getType()) {
+    case KlangParser.ADD:
+      return new Value(left.asInteger() + right.asInteger());
+    case KlangParser.SUB:
+      return new Value(left.asInteger() - right.asInteger());
+    default:
+      throw new RuntimeException("Unknown operator for additive expression: "+ KlangParser.VOCABULARY.getDisplayName(ctx.op.getType()));
     }
+  }
 
-    @Override
+  @Override
-    public Integer visitUnaryExpression(KlangParser.UnaryExpressionContext ctx) {
+  public Value visitModuloExpression(KlangParser.ModuloExpressionContext ctx) {
-        return Integer.parseInt(ctx.getText());
+    Value left = this.visit(ctx.atom(0));
-    }
+    Value right = this.visit(ctx.atom(1));
+    return new Value(left.asInteger() % right.asInteger());
+  }
+
+  @Override
+  public Value visitUnaryNegateExpression(KlangParser.UnaryNegateExpressionContext ctx) {
+    Value value = this.visit(ctx.atom());
+    return new Value(-value.asInteger());
+  }
+
+  @Override
+  public Value visitIntAtom(KlangParser.IntAtomContext ctx) {
+    return new Value(Integer.parseInt(ctx.getText()));
+  }
 }