1 files changed, 78 insertions, 0 deletions
diff --git a/chromium/third_party/node/node_modules/@babel/types/lib/modifications/flow/removeTypeDuplicates.js b/chromium/third_party/node/node_modules/@babel/types/lib/modifications/flow/removeTypeDuplicates.js
new file mode 100644
index 00000000000..de9464d1672
--- /dev/null
+++ b/chromium/third_party/node/node_modules/@babel/types/lib/modifications/flow/removeTypeDuplicates.js
@@ -0,0 +1,78 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = removeTypeDuplicates;
+
+var _generated = require("../../validators/generated");
+
+function getQualifiedName(node) {
+  return (0, _generated.isIdentifier)(node) ? node.name : `${node.id.name}.${getQualifiedName(node.qualification)}`;
+}
+
+function removeTypeDuplicates(nodes) {
+  const generics = {};
+  const bases = {};
+  const typeGroups = new Set();
+  const types = [];
+
+  for (let i = 0; i < nodes.length; i++) {
+    const node = nodes[i];
+    if (!node) continue;
+
+    if (types.indexOf(node) >= 0) {
+      continue;
+    }
+
+    if ((0, _generated.isAnyTypeAnnotation)(node)) {
+      return [node];
+    }
+
+    if ((0, _generated.isFlowBaseAnnotation)(node)) {
+      bases[node.type] = node;
+      continue;
+    }
+
+    if ((0, _generated.isUnionTypeAnnotation)(node)) {
+      if (!typeGroups.has(node.types)) {
+        nodes = nodes.concat(node.types);
+        typeGroups.add(node.types);
+      }
+
+      continue;
+    }
+
+    if ((0, _generated.isGenericTypeAnnotation)(node)) {
+      const name = getQualifiedName(node.id);
+
+      if (generics[name]) {
+        let existing = generics[name];
+
+        if (existing.typeParameters) {
+          if (node.typeParameters) {
+            existing.typeParameters.params = removeTypeDuplicates(existing.typeParameters.params.concat(node.typeParameters.params));
+          }
+        } else {
+          existing = node.typeParameters;
+        }
+      } else {
+        generics[name] = node;
+      }
+
+      continue;
+    }
+
+    types.push(node);
+  }
+
+  for (const type of Object.keys(bases)) {
+    types.push(bases[type]);
+  }
+
+  for (const name of Object.keys(generics)) {
+    types.push(generics[name]);
+  }
+
+  return types;
+}
+\ No newline at end of file