Initial commit

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

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+/**
+ * Copyright (c) 2018-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 type { ASTNode } from './ast';
+import { Kind } from './kinds';
+
+export function isDefinitionNode(node: ASTNode): boolean %checks {
+  return (
+    isExecutableDefinitionNode(node) ||
+    isTypeSystemDefinitionNode(node) ||
+    isTypeSystemExtensionNode(node)
+  );
+}
+
+export function isExecutableDefinitionNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.OPERATION_DEFINITION ||
+    node.kind === Kind.FRAGMENT_DEFINITION
+  );
+}
+
+export function isSelectionNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.FIELD ||
+    node.kind === Kind.FRAGMENT_SPREAD ||
+    node.kind === Kind.INLINE_FRAGMENT
+  );
+}
+
+export function isValueNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.VARIABLE ||
+    node.kind === Kind.INT ||
+    node.kind === Kind.FLOAT ||
+    node.kind === Kind.STRING ||
+    node.kind === Kind.BOOLEAN ||
+    node.kind === Kind.NULL ||
+    node.kind === Kind.ENUM ||
+    node.kind === Kind.LIST ||
+    node.kind === Kind.OBJECT
+  );
+}
+
+export function isTypeNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.NAMED_TYPE ||
+    node.kind === Kind.LIST_TYPE ||
+    node.kind === Kind.NON_NULL_TYPE
+  );
+}
+
+export function isTypeSystemDefinitionNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.SCHEMA_DEFINITION ||
+    isTypeDefinitionNode(node) ||
+    node.kind === Kind.DIRECTIVE_DEFINITION
+  );
+}
+
+export function isTypeDefinitionNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.SCALAR_TYPE_DEFINITION ||
+    node.kind === Kind.OBJECT_TYPE_DEFINITION ||
+    node.kind === Kind.INTERFACE_TYPE_DEFINITION ||
+    node.kind === Kind.UNION_TYPE_DEFINITION ||
+    node.kind === Kind.ENUM_TYPE_DEFINITION ||
+    node.kind === Kind.INPUT_OBJECT_TYPE_DEFINITION
+  );
+}
+
+export function isTypeSystemExtensionNode(node: ASTNode): boolean %checks {
+  return node.kind === Kind.SCHEMA_EXTENSION || isTypeExtensionNode(node);
+}
+
+export function isTypeExtensionNode(node: ASTNode): boolean %checks {
+  return (
+    node.kind === Kind.SCALAR_TYPE_EXTENSION ||
+    node.kind === Kind.OBJECT_TYPE_EXTENSION ||
+    node.kind === Kind.INTERFACE_TYPE_EXTENSION ||
+    node.kind === Kind.UNION_TYPE_EXTENSION ||
+    node.kind === Kind.ENUM_TYPE_EXTENSION ||
+    node.kind === Kind.INPUT_OBJECT_TYPE_EXTENSION
+  );
+}