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1 files changed, 91 insertions, 0 deletions

diff --git a/node_modules/@webassemblyjs/ast/esm/traverse.js b/node_modules/@webassemblyjs/ast/esm/traverse.js
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+++ b/node_modules/@webassemblyjs/ast/esm/traverse.js
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+import { createPath } from "./node-path";
+import { unionTypesMap, nodeAndUnionTypes } from "./nodes"; // recursively walks the AST starting at the given node. The callback is invoked for
+// and object that has a 'type' property.
+
+function walk(context, callback) {
+  var stop = false;
+
+  function innerWalk(context, callback) {
+    if (stop) {
+      return;
+    }
+
+    var node = context.node;
+
+    if (node._deleted === true) {
+      return;
+    }
+
+    var path = createPath(context);
+    callback(node.type, path);
+
+    if (path.shouldStop) {
+      stop = true;
+      return;
+    }
+
+    Object.keys(node).forEach(function (prop) {
+      var value = node[prop];
+
+      if (value === null || value === undefined) {
+        return;
+      }
+
+      var valueAsArray = Array.isArray(value) ? value : [value];
+      valueAsArray.forEach(function (childNode) {
+        if (typeof childNode.type === "string") {
+          var childContext = {
+            node: childNode,
+            parentKey: prop,
+            parentPath: path,
+            shouldStop: false,
+            inList: Array.isArray(value)
+          };
+          innerWalk(childContext, callback);
+        }
+      });
+    });
+  }
+
+  innerWalk(context, callback);
+}
+
+var noop = function noop() {};
+
+export function traverse(node, visitors) {
+  var before = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : noop;
+  var after = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : noop;
+  Object.keys(visitors).forEach(function (visitor) {
+    if (!nodeAndUnionTypes.includes(visitor)) {
+      throw new Error("Unexpected visitor ".concat(visitor));
+    }
+  });
+  var context = {
+    node: node,
+    inList: false,
+    shouldStop: false,
+    parentPath: null,
+    parentKey: null
+  };
+  walk(context, function (type, path) {
+    if (typeof visitors[type] === "function") {
+      before(type, path);
+      visitors[type](path);
+      after(type, path);
+    }
+
+    var unionTypes = unionTypesMap[type];
+
+    if (!unionTypes) {
+      throw new Error("Unexpected node type ".concat(type));
+    }
+
+    unionTypes.forEach(function (unionType) {
+      if (typeof visitors[unionType] === "function") {
+        before(unionType, path);
+        visitors[unionType](path);
+        after(unionType, path);
+      }
+    });
+  });
+}
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