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qwen/nodejs/node_modules/eslint/lib/rules/space-infix-ops.js

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+/**
+ * @fileoverview Require spaces around infix operators
+ * @author Michael Ficarra
+ * @deprecated in ESLint v8.53.0
+ */
+"use strict";
+
+const { isEqToken } = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        deprecated: true,
+        replacedBy: [],
+        type: "layout",
+
+        docs: {
+            description: "Require spacing around infix operators",
+            recommended: false,
+            url: "https://eslint.org/docs/latest/rules/space-infix-ops"
+        },
+
+        fixable: "whitespace",
+
+        schema: [
+            {
+                type: "object",
+                properties: {
+                    int32Hint: {
+                        type: "boolean",
+                        default: false
+                    }
+                },
+                additionalProperties: false
+            }
+        ],
+
+        messages: {
+            missingSpace: "Operator '{{operator}}' must be spaced."
+        }
+    },
+
+    create(context) {
+        const int32Hint = context.options[0] ? context.options[0].int32Hint === true : false;
+        const sourceCode = context.sourceCode;
+
+        /**
+         * Returns the first token which violates the rule
+         * @param {ASTNode} left The left node of the main node
+         * @param {ASTNode} right The right node of the main node
+         * @param {string} op The operator of the main node
+         * @returns {Object} The violator token or null
+         * @private
+         */
+        function getFirstNonSpacedToken(left, right, op) {
+            const operator = sourceCode.getFirstTokenBetween(left, right, token => token.value === op);
+            const prev = sourceCode.getTokenBefore(operator);
+            const next = sourceCode.getTokenAfter(operator);
+
+            if (!sourceCode.isSpaceBetweenTokens(prev, operator) || !sourceCode.isSpaceBetweenTokens(operator, next)) {
+                return operator;
+            }
+
+            return null;
+        }
+
+        /**
+         * Reports an AST node as a rule violation
+         * @param {ASTNode} mainNode The node to report
+         * @param {Object} culpritToken The token which has a problem
+         * @returns {void}
+         * @private
+         */
+        function report(mainNode, culpritToken) {
+            context.report({
+                node: mainNode,
+                loc: culpritToken.loc,
+                messageId: "missingSpace",
+                data: {
+                    operator: culpritToken.value
+                },
+                fix(fixer) {
+                    const previousToken = sourceCode.getTokenBefore(culpritToken);
+                    const afterToken = sourceCode.getTokenAfter(culpritToken);
+                    let fixString = "";
+
+                    if (culpritToken.range[0] - previousToken.range[1] === 0) {
+                        fixString = " ";
+                    }
+
+                    fixString += culpritToken.value;
+
+                    if (afterToken.range[0] - culpritToken.range[1] === 0) {
+                        fixString += " ";
+                    }
+
+                    return fixer.replaceText(culpritToken, fixString);
+                }
+            });
+        }
+
+        /**
+         * Check if the node is binary then report
+         * @param {ASTNode} node node to evaluate
+         * @returns {void}
+         * @private
+         */
+        function checkBinary(node) {
+            const leftNode = (node.left.typeAnnotation) ? node.left.typeAnnotation : node.left;
+            const rightNode = node.right;
+
+            // search for = in AssignmentPattern nodes
+            const operator = node.operator || "=";
+
+            const nonSpacedNode = getFirstNonSpacedToken(leftNode, rightNode, operator);
+
+            if (nonSpacedNode) {
+                if (!(int32Hint && sourceCode.getText(node).endsWith("|0"))) {
+                    report(node, nonSpacedNode);
+                }
+            }
+        }
+
+        /**
+         * Check if the node is conditional
+         * @param {ASTNode} node node to evaluate
+         * @returns {void}
+         * @private
+         */
+        function checkConditional(node) {
+            const nonSpacedConsequentNode = getFirstNonSpacedToken(node.test, node.consequent, "?");
+            const nonSpacedAlternateNode = getFirstNonSpacedToken(node.consequent, node.alternate, ":");
+
+            if (nonSpacedConsequentNode) {
+                report(node, nonSpacedConsequentNode);
+            }
+
+            if (nonSpacedAlternateNode) {
+                report(node, nonSpacedAlternateNode);
+            }
+        }
+
+        /**
+         * Check if the node is a variable
+         * @param {ASTNode} node node to evaluate
+         * @returns {void}
+         * @private
+         */
+        function checkVar(node) {
+            const leftNode = (node.id.typeAnnotation) ? node.id.typeAnnotation : node.id;
+            const rightNode = node.init;
+
+            if (rightNode) {
+                const nonSpacedNode = getFirstNonSpacedToken(leftNode, rightNode, "=");
+
+                if (nonSpacedNode) {
+                    report(node, nonSpacedNode);
+                }
+            }
+        }
+
+        return {
+            AssignmentExpression: checkBinary,
+            AssignmentPattern: checkBinary,
+            BinaryExpression: checkBinary,
+            LogicalExpression: checkBinary,
+            ConditionalExpression: checkConditional,
+            VariableDeclarator: checkVar,
+
+            PropertyDefinition(node) {
+                if (!node.value) {
+                    return;
+                }
+
+                /*
+                 * Because of computed properties and type annotations, some
+                 * tokens may exist between `node.key` and `=`.
+                 * Therefore, find the `=` from the right.
+                 */
+                const operatorToken = sourceCode.getTokenBefore(node.value, isEqToken);
+                const leftToken = sourceCode.getTokenBefore(operatorToken);
+                const rightToken = sourceCode.getTokenAfter(operatorToken);
+
+                if (
+                    !sourceCode.isSpaceBetweenTokens(leftToken, operatorToken) ||
+                    !sourceCode.isSpaceBetweenTokens(operatorToken, rightToken)
+                ) {
+                    report(node, operatorToken);
+                }
+            }
+        };
+
+    }
+};