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