eslint-plugin-regexp
Version:
ESLint plugin for finding RegExp mistakes and RegExp style guide violations.
72 lines (71 loc) • 2.54 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const utils_1 = require("../utils");
function getErrorIndex(error) {
const index = error.index;
if (typeof index === "number") {
return index;
}
return null;
}
exports.default = (0, utils_1.createRule)("no-invalid-regexp", {
meta: {
docs: {
description: "disallow invalid regular expression strings in `RegExp` constructors",
category: "Possible Errors",
recommended: true,
},
schema: [],
messages: {
error: "{{message}}",
duplicateFlag: "Duplicate {{flag}} flag.",
uvFlag: "Regex 'u' and 'v' flags cannot be used together.",
},
type: "problem",
},
create(context) {
function visitInvalid(regexpContext) {
const { node, error, patternSource } = regexpContext;
let loc = undefined;
const index = getErrorIndex(error);
if (index !== null &&
index >= 0 &&
index <= patternSource.value.length) {
loc = patternSource.getAstLocation({
start: Math.max(index - 1, 0),
end: Math.min(index + 1, patternSource.value.length),
});
}
context.report({
node,
loc: loc !== null && loc !== void 0 ? loc : undefined,
messageId: "error",
data: { message: error.message },
});
}
function visitUnknown(regexpContext) {
const { node, flags, flagsString, getFlagsLocation } = regexpContext;
const flagSet = new Set();
for (const flag of flagsString !== null && flagsString !== void 0 ? flagsString : "") {
if (flagSet.has(flag)) {
context.report({
node,
loc: getFlagsLocation(),
messageId: "duplicateFlag",
data: { flag },
});
return;
}
flagSet.add(flag);
}
if (flags.unicode && flags.unicodeSets) {
context.report({
node,
loc: getFlagsLocation(),
messageId: "uvFlag",
});
}
}
return (0, utils_1.defineRegexpVisitor)(context, { visitInvalid, visitUnknown });
},
});