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node_modules/eslint-plugin-react/lib/util/annotations.js

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+/**
+ * @fileoverview Utility functions for type annotation detection.
+ * @author Yannick Croissant
+ * @author Vitor Balocco
+ */
+
+'use strict';
+
+const getFirstTokens = require('./eslint').getFirstTokens;
+
+/**
+ * Checks if we are declaring a `props` argument with a flow type annotation.
+ * @param {ASTNode} node The AST node being checked.
+ * @param {Object} context
+ * @returns {boolean} True if the node is a type annotated props declaration, false if not.
+ */
+function isAnnotatedFunctionPropsDeclaration(node, context) {
+  if (!node || !node.params || !node.params.length) {
+    return false;
+  }
+
+  const typeNode = node.params[0].type === 'AssignmentPattern' ? node.params[0].left : node.params[0];
+
+  const tokens = getFirstTokens(context, typeNode, 2);
+  const isAnnotated = typeNode.typeAnnotation;
+  const isDestructuredProps = typeNode.type === 'ObjectPattern';
+  const isProps = tokens[0].value === 'props' || (tokens[1] && tokens[1].value === 'props');
+
+  return (isAnnotated && (isDestructuredProps || isProps));
+}
+
+module.exports = {
+  isAnnotatedFunctionPropsDeclaration,
+};