filename: validate input

Author: scivision

+stdlib/filename.m

@@ -7,19 +7,17 @@
 
 function f = filename(p, method)
 arguments
-  p
-  method = 'pattern'
+  p string
+  method {mustBeMember(method, {'pattern', 'regexp'})} = 'pattern'
 end
 
 % the pattern method is a few percent faster than regexp  
 switch method
-  case 'pattern', f = extractAfter(p, asManyOfPattern(wildcardPattern + ("/" | filesep)));
+  case 'pattern'
+    f = extractAfter(p, asManyOfPattern(wildcardPattern + ("/" | filesep)));
   case 'regexp'
     f = regexp(p, ['[^/\' filesep ']*$'], 'match', 'once');
-    try %#ok<TRYNC>
-      f(ismissing(f)) = "";
-    end
-  otherwise, error('unknown method %s', method)
+    f(ismissing(f)) = "";
 end
 
 end