move creation of new scanner into scanner class itself

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/parser/Scanner.java

@@ -5906,4 +5906,18 @@ protected void growCommentInfoArrays(int length, int newLength) {
 	System.arraycopy(this.commentTagStarts, 0, this.commentTagStarts = new int[newLength], 0, length);
 }
 
+@Override
+public Scanner clone() {
+	return new Scanner(
+			this.tokenizeComments,
+			this.tokenizeWhiteSpace,
+			this.checkNonExternalizedStringLiterals,
+			this.sourceLevel,
+			this.complianceLevel,
+			this.taskTags,
+			this.taskPriorities,
+			this.isTaskCaseSensitive,
+			this.previewEnabled);
+}
+
 }

org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/CharacterLiteral.java

@@ -206,16 +206,7 @@ void internalSetEscapedValue(String value) {
 	 */
 	public char charValue() {
 		// create a new local scanner to allow concurrent use
-		Scanner scanner = new Scanner(
-				this.ast.scanner.tokenizeComments,
-				this.ast.scanner.tokenizeWhiteSpace,
-				this.ast.scanner.checkNonExternalizedStringLiterals,
-				this.ast.scanner.sourceLevel,
-				this.ast.scanner.complianceLevel,
-				this.ast.scanner.taskTags,
-				this.ast.scanner.taskPriorities,
-				this.ast.scanner.isTaskCaseSensitive,
-				this.ast.scanner.previewEnabled);
+		Scanner scanner = this.ast.scanner.clone();
 
 		char[] source = this.escapedValue.toCharArray();
 		scanner.setSource(source);

org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/StringLiteral.java

@@ -217,16 +217,7 @@ public String getLiteralValue() {
 		}
 
 		// create a new local scanner to allow concurrent use
-		Scanner scanner = new Scanner(
-				this.ast.scanner.tokenizeComments,
-				this.ast.scanner.tokenizeWhiteSpace,
-				this.ast.scanner.checkNonExternalizedStringLiterals,
-				this.ast.scanner.sourceLevel,
-				this.ast.scanner.complianceLevel,
-				this.ast.scanner.taskTags,
-				this.ast.scanner.taskPriorities,
-				this.ast.scanner.isTaskCaseSensitive,
-				this.ast.scanner.previewEnabled);
+		Scanner scanner = this.ast.scanner.clone();
 
 		char[] source = s.toCharArray();
 		scanner.setSource(source);