58 lines
1.4 KiB
JavaScript
58 lines
1.4 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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