create a separate enum for use of other APIs, to accept URLPattern di…

…rectly

spec.bs

@@ -164,6 +164,7 @@ It can be constructed using a string for each component, or from a shorthand str
 
 <xmp class="idl">
 typedef (USVString or URLPatternInit) URLPatternInput;
+typedef (USVString or URLPatternInit or URLPattern) URLPatternCompatible;
 
 [Exposed=(Window,Worker)]
 interface URLPattern {
@@ -1951,19 +1952,19 @@ JavaScript APIs should accept all of:
 * a dictionary-like object which specifies the components required to construct a pattern
 * a string (in the constructor string syntax)
 
-To accomplish this, specifications should accept {{URLPatternInput}} as an argument to an [=operation=] or [=dictionary member=], and process it using the following algorithm, using the appropriate [=environment settings object=]'s [=environment settings object/API base URL=] or equivalent.
+To accomplish this, specifications should accept {{URLPatternCompatible}} as an argument to an [=operation=] or [=dictionary member=], and process it using the following algorithm, using the appropriate [=environment settings object=]'s [=environment settings object/API base URL=] or equivalent.
 
 <div algorithm>
-  To <dfn for=URLPattern>build a {{URLPattern}} from a WebIDL value</dfn> {{URLPatternInput}} |input| given [=URL=] |baseURL|, perform the following steps:
+  To <dfn for=URLPattern>build a {{URLPattern}} from a WebIDL value</dfn> {{URLPatternCompatible}} |input| given [=URL=] |baseURL|, perform the following steps:
 
-  1. If the [=specific type=] of |input| is {{USVString}}:
-    1. Return the result of constructing a {{URLPattern/constructor(input, baseURL, options)}} given |input| and the [=URL serializer|serialization=] of |baseURL|.
-  1. Otherwise:
-    1. [=Assert=]: the [=specific type=] of |input| is {{URLPatternInit}}.
+  1. If the [=specific type=] of |input| is {{URLPattern}}:
+    1. Return |input|.
+  1. Otherwise, if the [=specific type=] of |input| is {{URLPatternInit}}:
     1. If |input|["`baseURL`"] does not [=map/exist=], set it to the [=URL serializer|serialization=] of |baseURL|.
     1. Return the result of constructing a {{URLPattern/constructor(input, options)}} given |input|.
-
-  <div class=issue>Currently, {{URLPattern}} objects are not handled specially here, but perhaps they should be, since even though {{URLPattern}} has the properties necessary for {{URLPatternInit}}, this loses the {{URLPatternOptions/ignoreCase}} option (which is not exposed on the {{URLPattern}} interface).</div>
+  1. Otherwise:
+    1. [=Assert=]: The [=specific type=] of |input| is {{USVString}}:
+    1. Return the result of constructing a {{URLPattern/constructor(input, baseURL, options)}} given |input| and the [=URL serializer|serialization=] of |baseURL|.
 </div>
 
 This allows authors to concisely specify most patterns, and use the {{URLPattern/constructor|constructor}} to access uncommon options if necessary. The implicit use of the base URL is similar to, and consistent with, [[HTML]]'s [=parse a URL=] algorithm.