40 lines
1.6 KiB
JavaScript
40 lines
1.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const regexp_ast_analysis_1 = require("regexp-ast-analysis");
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const utils_1 = require("../utils");
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exports.default = (0, utils_1.createRule)("no-potentially-useless-backreference", {
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meta: {
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docs: {
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description: "disallow backreferences that reference a group that might not be matched",
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category: "Possible Errors",
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recommended: true,
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default: "warn",
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},
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schema: [],
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messages: {
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potentiallyUselessBackreference: "Some paths leading to the backreference do not go through the referenced capturing group or the captured text might be reset before reaching the backreference.",
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},
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type: "problem",
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},
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create(context) {
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function createVisitor({ node, flags, getRegexpLocation, }) {
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return {
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onBackreferenceEnter(backreference) {
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if ((0, regexp_ast_analysis_1.isEmptyBackreference)(backreference, flags)) {
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return;
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}
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if (!(0, regexp_ast_analysis_1.isStrictBackreference)(backreference)) {
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context.report({
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node,
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loc: getRegexpLocation(backreference),
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messageId: "potentiallyUselessBackreference",
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});
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}
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},
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};
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}
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return (0, utils_1.defineRegexpVisitor)(context, {
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createVisitor,
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});
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},
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});
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