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qwen/nodejs/node_modules/eslint/lib/rules/one-var-declaration-per-line.js

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+/**
+ * @fileoverview Rule to check multiple var declarations per line
+ * @author Alberto Rodríguez
+ * @deprecated in ESLint v8.53.0
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        deprecated: true,
+        replacedBy: [],
+        type: "suggestion",
+
+        docs: {
+            description: "Require or disallow newlines around variable declarations",
+            recommended: false,
+            url: "https://eslint.org/docs/latest/rules/one-var-declaration-per-line"
+        },
+
+        schema: [
+            {
+                enum: ["always", "initializations"]
+            }
+        ],
+
+        fixable: "whitespace",
+
+        messages: {
+            expectVarOnNewline: "Expected variable declaration to be on a new line."
+        }
+    },
+
+    create(context) {
+
+        const always = context.options[0] === "always";
+
+        //--------------------------------------------------------------------------
+        // Helpers
+        //--------------------------------------------------------------------------
+
+
+        /**
+         * Determine if provided keyword is a variant of for specifiers
+         * @private
+         * @param {string} keyword keyword to test
+         * @returns {boolean} True if `keyword` is a variant of for specifier
+         */
+        function isForTypeSpecifier(keyword) {
+            return keyword === "ForStatement" || keyword === "ForInStatement" || keyword === "ForOfStatement";
+        }
+
+        /**
+         * Checks newlines around variable declarations.
+         * @private
+         * @param {ASTNode} node `VariableDeclaration` node to test
+         * @returns {void}
+         */
+        function checkForNewLine(node) {
+            if (isForTypeSpecifier(node.parent.type)) {
+                return;
+            }
+
+            const declarations = node.declarations;
+            let prev;
+
+            declarations.forEach(current => {
+                if (prev && prev.loc.end.line === current.loc.start.line) {
+                    if (always || prev.init || current.init) {
+                        context.report({
+                            node,
+                            messageId: "expectVarOnNewline",
+                            loc: current.loc,
+                            fix: fixer => fixer.insertTextBefore(current, "\n")
+                        });
+                    }
+                }
+                prev = current;
+            });
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+            VariableDeclaration: checkForNewLine
+        };
+
+    }
+};