Prism: make parseSingleExpressionString a static method

Needed for subsequent use in Property for parsing RESULT expressions.


git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@11549 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/prism/Prism.java

@@ -1588,7 +1588,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 	 * Parse a single PRISM expression from a string.
 	 * @param s String to parse
 	 */
-	public Expression parseSingleExpressionString(String s) throws PrismLangException
+	public static Expression parseSingleExpressionString(String s) throws PrismLangException
 	{
 		PrismParser prismParser;
 		Expression expr;