eslint-plugin-regexp
Version:
ESLint plugin for finding RegExp mistakes and RegExp style guide violations.
92 lines (91 loc) • 3.87 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const utils_1 = require("../utils");
const mention_1 = require("../utils/mention");
const regexp_ast_1 = require("../utils/regexp-ast");
exports.default = (0, utils_1.createRule)("prefer-question-quantifier", {
meta: {
docs: {
description: "enforce using `?` quantifier",
category: "Stylistic Issues",
recommended: true,
},
fixable: "code",
schema: [],
messages: {
unexpected: "Unexpected quantifier '{{expr}}'. Use '?' instead.",
unexpectedGroup: "Unexpected group {{expr}}. Use '{{instead}}' instead.",
},
type: "suggestion",
},
create(context) {
function createVisitor({ node, getRegexpLocation, fixReplaceQuant, fixReplaceNode, }) {
return {
onQuantifierEnter(qNode) {
if (qNode.min === 0 && qNode.max === 1) {
const [startOffset, endOffset] = (0, regexp_ast_1.getQuantifierOffsets)(qNode);
const text = qNode.raw.slice(startOffset, endOffset);
if (text !== "?") {
context.report({
node,
loc: getRegexpLocation(qNode, [
startOffset,
endOffset,
]),
messageId: "unexpected",
data: {
expr: text,
},
fix: fixReplaceQuant(qNode, "?"),
});
}
}
},
onGroupEnter(gNode) {
const lastAlt = gNode.alternatives[gNode.alternatives.length - 1];
if (!lastAlt.elements.length) {
const alternatives = gNode.alternatives.slice(0, -1);
while (alternatives.length > 0) {
if (!alternatives[alternatives.length - 1].elements
.length) {
alternatives.pop();
continue;
}
break;
}
if (!alternatives.length) {
return;
}
let reportNode = gNode;
const instead = `(?:${alternatives
.map((ne) => ne.raw)
.join("|")})?`;
if (gNode.parent.type === "Quantifier") {
if (gNode.parent.greedy &&
gNode.parent.min === 0 &&
gNode.parent.max === 1) {
reportNode = gNode.parent;
}
else {
return;
}
}
context.report({
node,
loc: getRegexpLocation(reportNode),
messageId: "unexpectedGroup",
data: {
expr: (0, mention_1.mention)(reportNode),
instead,
},
fix: fixReplaceNode(reportNode, instead),
});
}
},
};
}
return (0, utils_1.defineRegexpVisitor)(context, {
createVisitor,
});
},
});