implement fielfd assignment node

src/main/java/de/hsrm/compiler/Klang/nodes/statements/FieldAssignment.java

@@ -0,0 +1,25 @@
+package de.hsrm.compiler.Klang.nodes.statements;
+
+import de.hsrm.compiler.Klang.nodes.expressions.Expression;
+import de.hsrm.compiler.Klang.visitors.Visitor;
+
+public class FieldAssignment extends Statement {
+
+    public String varName;
+    public String structName;
+    public String[] path;
+    public Expression expression;
+
+    public FieldAssignment(String varName, String structName, String[] path, Expression expression) {
+        this.varName = varName;
+        this.structName = structName;
+        this.path = path;
+        this.expression = expression;
+    }
+
+    @Override
+    public <R> R welcome(Visitor<R> v) {
+        return v.visit(this);
+    }
+
+}