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qwen/nodejs/node_modules/eslint/lib/rules/dot-location.js

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+/**
+ * @fileoverview Validates newlines before and after dots
+ * @author Greg Cochard
+ * @deprecated in ESLint v8.53.0
+ */
+
+"use strict";
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        deprecated: true,
+        replacedBy: [],
+        type: "layout",
+
+        docs: {
+            description: "Enforce consistent newlines before and after dots",
+            recommended: false,
+            url: "https://eslint.org/docs/latest/rules/dot-location"
+        },
+
+        schema: [
+            {
+                enum: ["object", "property"]
+            }
+        ],
+
+        fixable: "code",
+
+        messages: {
+            expectedDotAfterObject: "Expected dot to be on same line as object.",
+            expectedDotBeforeProperty: "Expected dot to be on same line as property."
+        }
+    },
+
+    create(context) {
+
+        const config = context.options[0];
+
+        // default to onObject if no preference is passed
+        const onObject = config === "object" || !config;
+
+        const sourceCode = context.sourceCode;
+
+        /**
+         * Reports if the dot between object and property is on the correct location.
+         * @param {ASTNode} node The `MemberExpression` node.
+         * @returns {void}
+         */
+        function checkDotLocation(node) {
+            const property = node.property;
+            const dotToken = sourceCode.getTokenBefore(property);
+
+            if (onObject) {
+
+                // `obj` expression can be parenthesized, but those paren tokens are not a part of the `obj` node.
+                const tokenBeforeDot = sourceCode.getTokenBefore(dotToken);
+
+                if (!astUtils.isTokenOnSameLine(tokenBeforeDot, dotToken)) {
+                    context.report({
+                        node,
+                        loc: dotToken.loc,
+                        messageId: "expectedDotAfterObject",
+                        *fix(fixer) {
+                            if (dotToken.value.startsWith(".") && astUtils.isDecimalIntegerNumericToken(tokenBeforeDot)) {
+                                yield fixer.insertTextAfter(tokenBeforeDot, ` ${dotToken.value}`);
+                            } else {
+                                yield fixer.insertTextAfter(tokenBeforeDot, dotToken.value);
+                            }
+                            yield fixer.remove(dotToken);
+                        }
+                    });
+                }
+            } else if (!astUtils.isTokenOnSameLine(dotToken, property)) {
+                context.report({
+                    node,
+                    loc: dotToken.loc,
+                    messageId: "expectedDotBeforeProperty",
+                    *fix(fixer) {
+                        yield fixer.remove(dotToken);
+                        yield fixer.insertTextBefore(property, dotToken.value);
+                    }
+                });
+            }
+        }
+
+        /**
+         * Checks the spacing of the dot within a member expression.
+         * @param {ASTNode} node The node to check.
+         * @returns {void}
+         */
+        function checkNode(node) {
+            if (!node.computed) {
+                checkDotLocation(node);
+            }
+        }
+
+        return {
+            MemberExpression: checkNode
+        };
+    }
+};