.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-useless-catch.js

   1 /**
   2  * @fileoverview Reports useless `catch` clauses that just rethrow their error.
   3  * @author Teddy Katz
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Rule Definition
  10 //------------------------------------------------------------------------------
  11
  12 module.exports = {
  13     meta: {
  14         type: "suggestion",
  15
  16         docs: {
  17             description: "disallow unnecessary `catch` clauses",
  18             category: "Best Practices",
  19             recommended: true,
  20             url: "https://eslint.org/docs/rules/no-useless-catch"
  21         },
  22
  23         schema: []
  24     },
  25
  26     create(context) {
  27         return {
  28             CatchClause(node) {
  29                 if (
  30                     node.param &&
  31                     node.param.type === "Identifier" &&
  32                     node.body.body.length &&
  33                     node.body.body[0].type === "ThrowStatement" &&
  34                     node.body.body[0].argument.type === "Identifier" &&
  35                     node.body.body[0].argument.name === node.param.name
  36                 ) {
  37                     if (node.parent.finalizer) {
  38                         context.report({
  39                             node,
  40                             message: "Unnecessary catch clause."
  41                         });
  42                     } else {
  43                         context.report({
  44                             node: node.parent,
  45                             message: "Unnecessary try/catch wrapper."
  46                         });
  47                     }
  48                 }
  49             }
  50         };
  51     }
  52 };