[Truffle] - Implements Symbol#swapcase

Author: lucasallan

truffle/src/main/java/org/jruby/truffle/nodes/core/StringNodes.java

@@ -1982,7 +1982,7 @@ public RubyString chr(RubyString string) {
         }
     }
 
-    static class StringNodesHelper {
+    public static class StringNodesHelper {
 
         @TruffleBoundary
         public static ByteList capitalize(RubyString string) {

truffle/src/main/java/org/jruby/truffle/nodes/core/SymbolNodes.java

@@ -17,6 +17,7 @@
 import org.jruby.truffle.runtime.core.RubyProc;
 import org.jruby.truffle.runtime.core.RubyString;
 import org.jruby.truffle.runtime.core.RubySymbol;
+import org.jruby.util.ByteList;
 
 @CoreClass(name = "Symbol")
 public abstract class SymbolNodes {
@@ -230,4 +231,25 @@ public int size(RubySymbol symbol) {
 
     }
 
+    @CoreMethod(names = { "swapcase"})
+    public abstract static class SwapcaseNode extends CoreMethodNode {
+
+        public SwapcaseNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public SwapcaseNode(SwapcaseNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public RubySymbol swapcase(RubySymbol symbol) {
+            notDesignedForCompilation();
+
+            ByteList byteList = StringNodes.StringNodesHelper.swapcase(symbol.toRubyString());
+            return getContext().newSymbol(byteList);
+        }
+
+    }
+
 }