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app_vue/node_modules/eslint/lib/rules/no-confusing-arrow.js

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+/**
+ * @fileoverview A rule to warn against using arrow functions when they could be
+ * confused with comparisons
+ * @author Jxck <https://github.com/Jxck>
+ */
+
+"use strict";
+
+const astUtils = require("./utils/ast-utils.js");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Checks whether or not a node is a conditional expression.
+ * @param {ASTNode} node node to test
+ * @returns {boolean} `true` if the node is a conditional expression.
+ */
+function isConditional(node) {
+    return node && node.type === "ConditionalExpression";
+}
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "disallow arrow functions where they could be confused with comparisons",
+            category: "ECMAScript 6",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-confusing-arrow"
+        },
+
+        fixable: "code",
+
+        schema: [{
+            type: "object",
+            properties: {
+                allowParens: { type: "boolean", default: true }
+            },
+            additionalProperties: false
+        }],
+
+        messages: {
+            confusing: "Arrow function used ambiguously with a conditional expression."
+        }
+    },
+
+    create(context) {
+        const config = context.options[0] || {};
+        const allowParens = config.allowParens || (config.allowParens === void 0);
+        const sourceCode = context.getSourceCode();
+
+
+        /**
+         * Reports if an arrow function contains an ambiguous conditional.
+         * @param {ASTNode} node A node to check and report.
+         * @returns {void}
+         */
+        function checkArrowFunc(node) {
+            const body = node.body;
+
+            if (isConditional(body) && !(allowParens && astUtils.isParenthesised(sourceCode, body))) {
+                context.report({
+                    node,
+                    messageId: "confusing",
+                    fix(fixer) {
+
+                        // if `allowParens` is not set to true don't bother wrapping in parens
+                        return allowParens && fixer.replaceText(node.body, `(${sourceCode.getText(node.body)})`);
+                    }
+                });
+            }
+        }
+
+        return {
+            ArrowFunctionExpression: checkArrowFunc
+        };
+    }
+};