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server/node_modules/graphql/language/source.js.flow

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+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+import invariant from '../jsutils/invariant';
+import defineToStringTag from '../jsutils/defineToStringTag';
+
+type Location = {|
+  line: number,
+  column: number,
+|};
+
+/**
+ * A representation of source input to GraphQL.
+ * `name` and `locationOffset` are optional. They are useful for clients who
+ * store GraphQL documents in source files; for example, if the GraphQL input
+ * starts at line 40 in a file named Foo.graphql, it might be useful for name to
+ * be "Foo.graphql" and location to be `{ line: 40, column: 0 }`.
+ * line and column in locationOffset are 1-indexed
+ */
+export class Source {
+  body: string;
+  name: string;
+  locationOffset: Location;
+
+  constructor(body: string, name?: string, locationOffset?: Location): void {
+    this.body = body;
+    this.name = name || 'GraphQL request';
+    this.locationOffset = locationOffset || { line: 1, column: 1 };
+    invariant(
+      this.locationOffset.line > 0,
+      'line in locationOffset is 1-indexed and must be positive',
+    );
+    invariant(
+      this.locationOffset.column > 0,
+      'column in locationOffset is 1-indexed and must be positive',
+    );
+  }
+}
+
+// Conditionally apply `[Symbol.toStringTag]` if `Symbol`s are supported
+defineToStringTag(Source);