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57 lines
1.7 KiB
57 lines
1.7 KiB
/** |
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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('../shared/types').Rule} */ |
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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/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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