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Frontend-Learner/node_modules/eslint-plugin-regexp/dist/rules/no-useless-quantifier.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const regexp_ast_analysis_1 = require("regexp-ast-analysis");
+const utils_1 = require("../utils");
+exports.default = (0, utils_1.createRule)("no-useless-quantifier", {
+    meta: {
+        docs: {
+            description: "disallow quantifiers that can be removed",
+            category: "Best Practices",
+            recommended: true,
+        },
+        fixable: "code",
+        schema: [],
+        messages: {
+            constOne: "Unexpected useless quantifier.",
+            empty: "Unexpected useless quantifier. The quantified element doesn't consume or assert characters.",
+            emptyQuestionMark: "Unexpected useless quantifier. The quantified element can already accept the empty string, so this quantifier is redundant.",
+            zeroLength: "Unexpected useless quantifier. The quantified element doesn't consume characters.",
+            remove: "Remove the '{{quant}}' quantifier.",
+        },
+        type: "suggestion",
+        hasSuggestions: true,
+    },
+    create(context) {
+        function createVisitor(regexpContext) {
+            const { node, flags, getRegexpLocation, fixReplaceNode } = regexpContext;
+            function fixRemoveQuant(qNode) {
+                return fixReplaceNode(qNode, () => {
+                    const text = qNode.element.raw;
+                    return (0, utils_1.canUnwrapped)(qNode, text) ? text : null;
+                });
+            }
+            function suggestRemoveQuant(qNode) {
+                const quant = qNode.raw.slice(qNode.element.end - qNode.start);
+                return {
+                    messageId: "remove",
+                    data: { quant },
+                    fix: fixReplaceNode(qNode, () => {
+                        const text = qNode.element.raw;
+                        return (0, utils_1.canUnwrapped)(qNode, text) ? text : null;
+                    }),
+                };
+            }
+            return {
+                onQuantifierEnter(qNode) {
+                    if (qNode.min === 1 && qNode.max === 1) {
+                        context.report({
+                            node,
+                            loc: getRegexpLocation(qNode),
+                            messageId: "constOne",
+                            fix: fixRemoveQuant(qNode),
+                        });
+                        return;
+                    }
+                    if ((0, regexp_ast_analysis_1.isEmpty)(qNode.element, flags)) {
+                        context.report({
+                            node,
+                            loc: getRegexpLocation(qNode),
+                            messageId: "empty",
+                            suggest: [suggestRemoveQuant(qNode)],
+                        });
+                        return;
+                    }
+                    if (qNode.min === 0 &&
+                        qNode.max === 1 &&
+                        qNode.greedy &&
+                        (0, regexp_ast_analysis_1.isPotentiallyEmpty)(qNode.element, flags)) {
+                        context.report({
+                            node,
+                            loc: getRegexpLocation(qNode),
+                            messageId: "emptyQuestionMark",
+                            suggest: [suggestRemoveQuant(qNode)],
+                        });
+                        return;
+                    }
+                    if (qNode.min >= 1 && (0, regexp_ast_analysis_1.isZeroLength)(qNode.element, flags)) {
+                        context.report({
+                            node,
+                            loc: getRegexpLocation(qNode),
+                            messageId: "zeroLength",
+                            suggest: [suggestRemoveQuant(qNode)],
+                        });
+                    }
+                },
+            };
+        }
+        return (0, utils_1.defineRegexpVisitor)(context, {
+            createVisitor,
+        });
+    },
+});