[11 - Antlr Parser] Add "CC-Praxis-Antlr Parser fuer X-Leer"

2020-05-27 11:23:21 +02:00
parent 7863777f8f
commit 7d7b787c80
15 changed files with 1568 additions and 0 deletions
--- a/X-Leer/src/de/dhbw/compiler/antlrxparser/AntlrXParserMain.java
+++ b/X-Leer/src/de/dhbw/compiler/antlrxparser/AntlrXParserMain.java
@@ -0,0 +1,81 @@
+/* **********************************************
+ * Duale Hochschule Baden-Württemberg Karlsruhe
+ * Prof. Dr. Jörn Eisenbiegler
+ * 
+ * Vorlesung Übersetzerbau
+ * Praxis ANTLR-Parser für X
+ * - Main-Klasse
+ * 
+ * **********************************************
+ */
+
+package de.dhbw.compiler.antlrxparser;
+
+import java.io.ByteArrayInputStream;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+import org.antlr.runtime.ANTLRInputStream;
+import org.antlr.runtime.CommonTokenStream;
+import org.antlr.runtime.tree.CommonTree;
+import org.antlr.runtime.tree.DOTTreeGenerator;
+import org.antlr.runtime.tree.Tree;
+import org.antlr.stringtemplate.StringTemplate;
+
+public class AntlrXParserMain {
+
+	public static void saveToGrapvizDOT(Tree tree, String name) throws FileNotFoundException {
+		StringTemplate dot = (new DOTTreeGenerator()).toDOT(tree);
+		PrintWriter out = new PrintWriter(name);
+		out.println(dot.toString());
+		out.close();
+	}
+	
+	private static final String TEST = 
+			"program test2;\n"+
+			"	x : int;\n"+
+			"	y : float;\n"+
+			"	z : string;\n"+
+			"begin\n"+
+			"	x := 4+5+6.2;\n"+
+			"	y := 3.56+1.2e3+45.e-67+4e34+3E-1;\n"+
+			"	z := \"Hello \\\"World\\\"\" + \":\";\n"+
+			"	z := \"Peter\" + 4;\n"+
+			"   if 2<3 then abc := 5 else abc := 7;\n"+
+			"   while (x>y) y := y+1;\n"+
+			"   begin\n"+
+			"      for (x:=1; x<6; x:=x+1) y:=y+2;\n"+
+			"   end;\n"+
+			"end.";
+	
+	private static final String TEST2 = 
+			"program test2;\n"+
+			"begin\n"+
+			"	x := 4-5*6*7+8/9;\n"+
+			"end.";
+
+	private static final String BEISPIELFOLIEN = 
+			"program test5;\n"+
+			"	read  x : int;\n"+
+			"	print y : float;\n"+
+			"	z : int;\n"+
+			"begin\n"+
+			"	while (x<4) begin\n"+
+			"		for (z:=0; z<4; z:=z+1) x:=x+2;\n"+
+			"		if x=4 then begin\n"+
+			"			x:=z*(x+2);\n"+
+			"			x:=x+10;\n"+
+			"		end else y:=100.e-3;\n"+
+			"	end;\n"+
+			"end.\n";
+	
+	public static void main(String[] args) throws Exception {
+		
+		ANTLRInputStream input = new ANTLRInputStream(new ByteArrayInputStream(BEISPIELFOLIEN.getBytes())); 
+		
+		//TODO
+		// - Scanner aufrufen
+		// - Parser aufrufen
+		// - Text- und Grapviz-Form ausgeben/speichern
+		
+	}
+}