49 lines
1.8 KiB
JavaScript
49 lines
1.8 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-empty-character-class", {
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meta: {
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docs: {
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description: "disallow character classes that match no characters",
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category: "Possible Errors",
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recommended: true,
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},
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schema: [],
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messages: {
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empty: "This character class matches no characters because it is empty.",
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cannotMatchAny: "This character class cannot match any characters.",
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},
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type: "suggestion",
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},
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create(context) {
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function createVisitor(regexpContext) {
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const { node, getRegexpLocation, flags } = regexpContext;
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return {
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onCharacterClassEnter(ccNode) {
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if ((0, regexp_ast_analysis_1.matchesNoCharacters)(ccNode, flags)) {
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context.report({
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node,
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loc: getRegexpLocation(ccNode),
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messageId: ccNode.elements.length
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? "cannotMatchAny"
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: "empty",
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});
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}
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},
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onExpressionCharacterClassEnter(ccNode) {
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if ((0, regexp_ast_analysis_1.matchesNoCharacters)(ccNode, flags)) {
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context.report({
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node,
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loc: getRegexpLocation(ccNode),
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messageId: "cannotMatchAny",
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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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