Add support for async_iterable

cf whatwg/webidl#1500

Author: dontcallmedom

src/cli/check-missing-dfns.js

@@ -213,6 +213,7 @@ function getExpectedDfnFromIdlDesc(idl, parentIdl) {
       break;
 
     case 'iterable':
+    case 'async_iterable':
     case 'maplike':
     case 'setlike':
       // No definition expected for iterable, maplike and setlike members
@@ -583,4 +584,4 @@ if (process.argv[1] === fileURLToPath(import.meta.url)) {
         console.log();
       })
     }
-}
+}

src/cli/parse-webidl.js

@@ -197,6 +197,7 @@ function parseIdlAstTree(idlReport, contextName) {
             def.arguments.forEach(a => parseType(a.idlType, idlReport));
             break;
         case "iterable":
+        case "async_iterable":
         case "setlike":
         case "maplike":
             var type = def.idlType;

src/postprocessing/idlparsed.js

@@ -19,7 +19,7 @@ export default {
       let dfnOverload = 0;
       let dfnName;
       if (member) {
-        if (['iterable', 'maplike', 'setlike'].includes(member.type) ||
+        if (['async_iterable', 'iterable', 'maplike', 'setlike'].includes(member.type) ||
             ['getter', 'setter', 'stringifier', 'deleter'].includes(member.special)) {
           // No dfns of these types in any spec as of Feb 2024, or at least no
           // no dfns that we can easily map to (for example, the HTML spec