Update to latest Binaryen & introduce anyref (#800)

Author: dcodeIO

.travis.yml

@@ -23,5 +23,5 @@ jobs:
     - npm run clean && npm run test:compiler rt/flags threads
     env:
     - Runs experimental tests on node.js v8-canary using
-    - ASC_FEATURES="simd,threads"
+    - ASC_FEATURES="mutable-globals,simd,threads,reference-types,bigint-integration"
     - NVM_NODEJS_ORG_MIRROR="https://nodejs.org/download/v8-canary/"

cli/asc.js

@@ -572,9 +572,20 @@ exports.main = function main(argv, options, callback) {
     }
   }
 
-  // Enable additional features if specified
-  var features = args.enable;
-  if (features != null) {
+  // Disable default features if specified
+  var features;
+  if ((features = args.disable) != null) {
+    if (typeof features === "string") features = features.split(",");
+    for (let i = 0, k = features.length; i < k; ++i) {
+      let name = features[i].trim();
+      let flag = assemblyscript["FEATURE_" + name.replace(/\-/g, "_").toUpperCase()];
+      if (!flag) return callback(Error("Feature '" + name + "' is unknown."));
+      assemblyscript.disableFeature(compilerOptions, flag);
+    }
+  }
+
+  // Enable experimental features if specified
+  if ((features = args.enable) != null) {
     if (typeof features === "string") features = features.split(",");
     for (let i = 0, k = features.length; i < k; ++i) {
       let name = features[i].trim();

cli/asc.json

@@ -186,17 +186,30 @@
   },
   "enable": {
     "description": [
-      "Enables additional (experimental) WebAssembly features.",
+      "Enables WebAssembly features that are disabled by default.",
       "",
-      " sign-extension  Enables sign-extension operations",
-      " mutable-global  Enables mutable global imports and exports",
-      " bulk-memory     Enables bulk memory operations",
-      " simd            Enables SIMD types and operations.",
-      " threads         Enables threading and atomic operations.",
+      " sign-extension      Sign-extension operations",
+      " bulk-memory         Bulk memory operations.",
+      " simd                SIMD types and operations.",
+      " threads             Threading and atomic operations.",
+      " reference-types     Reference types and operations.",
       ""
     ],
+    "TODO_doesNothingYet": [
+      " nontrapping-f2i     Non-trapping float to integer ops.",
+      " exception-handling  Exception handling.",
+      " tail-calls          Tail call operations."
+    ],
     "type": "s"
   },
+  "disable": {
+    "description": [
+      "Disables WebAssembly features that are enabled by default.",
+      "",
+      " mutable-globals     Mutable global imports and exports.",
+      ""
+    ]
+  },
   "transform": {
     "description": "Specifies the path to a custom transform to 'require'.",
     "type": "S"