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

   1 /**
   2  * @fileoverview Rule to flag use of unary increment and decrement operators.
   3  * @author Ian Christian Myers
   4  * @author Brody McKee (github.com/mrmckeb)
   5  */
   6
   7 "use strict";
   8
   9 //------------------------------------------------------------------------------
  10 // Rule Definition
  11 //------------------------------------------------------------------------------
  12
  13 module.exports = {
  14     meta: {
  15         type: "suggestion",
  16
  17         docs: {
  18             description: "disallow the unary operators `++` and `--`",
  19             category: "Stylistic Issues",
  20             recommended: false,
  21             url: "https://eslint.org/docs/rules/no-plusplus"
  22         },
  23
  24         schema: [
  25             {
  26                 type: "object",
  27                 properties: {
  28                     allowForLoopAfterthoughts: {
  29                         type: "boolean",
  30                         default: false
  31                     }
  32                 },
  33                 additionalProperties: false
  34             }
  35         ]
  36     },
  37
  38     create(context) {
  39
  40         const config = context.options[0];
  41         let allowInForAfterthought = false;
  42
  43         if (typeof config === "object") {
  44             allowInForAfterthought = config.allowForLoopAfterthoughts === true;
  45         }
  46
  47         return {
  48
  49             UpdateExpression(node) {
  50                 if (allowInForAfterthought && node.parent.type === "ForStatement") {
  51                     return;
  52                 }
  53                 context.report({
  54                     node,
  55                     message: "Unary operator '{{operator}}' used.",
  56                     data: {
  57                         operator: node.operator
  58                     }
  59                 });
  60             }
  61
  62         };
  63
  64     }
  65 };