@stylistic/eslint-plugin-js/dist/rules/no-mixed-operators.js

JavaScript stylistic rules for ESLint, migrated from [eslint core](https://github.com/eslint/eslint).

import { c as createRule, I as getPrecedence, H as isParenthesised, o as isNotClosingParenToken } from '../utils.js';
import 'eslint-visitor-keys';
import 'espree';

const ARITHMETIC_OPERATORS = ["+", "-", "*", "/", "%", "**"];
const BITWISE_OPERATORS = ["&", "|", "^", "~", "<<", ">>", ">>>"];
const COMPARISON_OPERATORS = ["==", "!=", "===", "!==", ">", ">=", "<", "<="];
const LOGICAL_OPERATORS = ["&&", "||"];
const RELATIONAL_OPERATORS = ["in", "instanceof"];
const TERNARY_OPERATOR = ["?:"];
const COALESCE_OPERATOR = ["??"];
const ALL_OPERATORS = [].concat(
  ARITHMETIC_OPERATORS,
  BITWISE_OPERATORS,
  COMPARISON_OPERATORS,
  LOGICAL_OPERATORS,
  RELATIONAL_OPERATORS,
  TERNARY_OPERATOR,
  COALESCE_OPERATOR
);
const DEFAULT_GROUPS = [
  ARITHMETIC_OPERATORS,
  BITWISE_OPERATORS,
  COMPARISON_OPERATORS,
  LOGICAL_OPERATORS,
  RELATIONAL_OPERATORS
];
const TARGET_NODE_TYPE = /^(?:Binary|Logical|Conditional)Expression$/u;
function normalizeOptions(options = {}) {
  const hasGroups = options.groups && options.groups.length > 0;
  const groups = hasGroups ? options.groups : DEFAULT_GROUPS;
  const allowSamePrecedence = options.allowSamePrecedence !== false;
  return {
    groups,
    allowSamePrecedence
  };
}
function includesBothInAGroup(groups, left, right) {
  return groups.some((group) => group.includes(left) && group.includes(right));
}
function getChildNode(node) {
  return node.type === "ConditionalExpression" ? node.test : node.left;
}
var noMixedOperators = createRule({
  name: "no-mixed-operators",
  package: "js",
  meta: {
    type: "layout",
    docs: {
      description: "Disallow mixed binary operators"
    },
    schema: [
      {
        type: "object",
        properties: {
          groups: {
            type: "array",
            items: {
              type: "array",
              items: {
                type: "string",
                enum: ALL_OPERATORS
              },
              minItems: 2,
              uniqueItems: true
            },
            uniqueItems: true
          },
          allowSamePrecedence: {
            type: "boolean",
            default: true
          }
        },
        additionalProperties: false
      }
    ],
    messages: {
      unexpectedMixedOperator: "Unexpected mix of '{{leftOperator}}' and '{{rightOperator}}'. Use parentheses to clarify the intended order of operations."
    }
  },
  create(context) {
    const sourceCode = context.sourceCode;
    const options = normalizeOptions(context.options[0]);
    function shouldIgnore(node) {
      const a = node;
      const b = node.parent;
      return !includesBothInAGroup(
        options.groups ?? [],
        a.operator,
        b.type === "ConditionalExpression" ? "?:" : b.operator
      ) || options.allowSamePrecedence && getPrecedence(a) === getPrecedence(b);
    }
    function isMixedWithParent(node) {
      return node.operator !== node.parent.operator && !isParenthesised(sourceCode, node);
    }
    function getOperatorToken(node) {
      return sourceCode.getTokenAfter(getChildNode(node), isNotClosingParenToken);
    }
    function reportBothOperators(node) {
      const parent = node.parent;
      const left = getChildNode(parent) === node ? node : parent;
      const right = getChildNode(parent) !== node ? node : parent;
      const data = {
        leftOperator: left.operator || "?:",
        rightOperator: right.operator || "?:"
      };
      context.report({
        node: left,
        loc: getOperatorToken(left).loc,
        messageId: "unexpectedMixedOperator",
        data
      });
      context.report({
        node: right,
        loc: getOperatorToken(right).loc,
        messageId: "unexpectedMixedOperator",
        data
      });
    }
    function check(node) {
      if (TARGET_NODE_TYPE.test(node.parent.type) && isMixedWithParent(node) && !shouldIgnore(node)) {
        reportBothOperators(node);
      }
    }
    return {
      BinaryExpression: check,
      LogicalExpression: check
    };
  }
});

export { noMixedOperators as default };