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58 lines
1.3 KiB
JavaScript
58 lines
1.3 KiB
JavaScript
/**
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* @fileoverview Reports useless `catch` clauses that just rethrow their error.
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* @author Teddy Katz
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../types').Rule.RuleModule} */
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "Disallow unnecessary `catch` clauses",
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recommended: true,
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url: "https://eslint.org/docs/latest/rules/no-useless-catch",
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},
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schema: [],
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messages: {
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unnecessaryCatchClause: "Unnecessary catch clause.",
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unnecessaryCatch: "Unnecessary try/catch wrapper.",
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},
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},
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create(context) {
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return {
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CatchClause(node) {
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if (
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node.param &&
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node.param.type === "Identifier" &&
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node.body.body.length &&
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node.body.body[0].type === "ThrowStatement" &&
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node.body.body[0].argument.type === "Identifier" &&
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node.body.body[0].argument.name === node.param.name
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) {
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if (node.parent.finalizer) {
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context.report({
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node,
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messageId: "unnecessaryCatchClause",
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});
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} else {
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context.report({
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node: node.parent,
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messageId: "unnecessaryCatch",
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});
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}
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}
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},
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};
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},
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};
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